diff --git a/consensus/clique/src/main/java/org/hyperledger/besu/consensus/clique/jsonrpc/methods/CliqueGetSigners.java b/consensus/clique/src/main/java/org/hyperledger/besu/consensus/clique/jsonrpc/methods/CliqueGetSigners.java
index 9f7b2d9f9d..813c296098 100644
--- a/consensus/clique/src/main/java/org/hyperledger/besu/consensus/clique/jsonrpc/methods/CliqueGetSigners.java
+++ b/consensus/clique/src/main/java/org/hyperledger/besu/consensus/clique/jsonrpc/methods/CliqueGetSigners.java
@@ -17,6 +17,7 @@ package org.hyperledger.besu.consensus.clique.jsonrpc.methods;
 import org.hyperledger.besu.consensus.common.validator.ValidatorProvider;
 import org.hyperledger.besu.ethereum.api.jsonrpc.RpcMethod;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.JsonRpcRequestContext;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.exception.InvalidJsonRpcParameters;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.methods.JsonRpcMethod;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.parameters.BlockParameter;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.JsonRpcErrorResponse;
@@ -67,8 +68,13 @@ public class CliqueGetSigners implements JsonRpcMethod {
   }
 
   private Optional<BlockHeader> determineBlockHeader(final JsonRpcRequestContext request) {
-    final Optional<BlockParameter> blockParameter =
-        request.getOptionalParameter(0, BlockParameter.class);
+    final Optional<BlockParameter> blockParameter;
+    try {
+      blockParameter = request.getOptionalParameter(0, BlockParameter.class);
+    } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
+      throw new InvalidJsonRpcParameters(
+          "Invalid block parameter (index 0)", RpcErrorType.INVALID_BLOCK_PARAMS, e);
+    }
     final long latest = blockchainQueries.headBlockNumber();
     final long blockNumber = blockParameter.map(b -> b.getNumber().orElse(latest)).orElse(latest);
     return blockchainQueries.blockByNumber(blockNumber).map(BlockWithMetadata::getHeader);
diff --git a/consensus/ibft/src/main/java/org/hyperledger/besu/consensus/ibft/jsonrpc/methods/IbftGetValidatorsByBlockNumber.java b/consensus/ibft/src/main/java/org/hyperledger/besu/consensus/ibft/jsonrpc/methods/IbftGetValidatorsByBlockNumber.java
index 5e36ca2070..7992f0918c 100644
--- a/consensus/ibft/src/main/java/org/hyperledger/besu/consensus/ibft/jsonrpc/methods/IbftGetValidatorsByBlockNumber.java
+++ b/consensus/ibft/src/main/java/org/hyperledger/besu/consensus/ibft/jsonrpc/methods/IbftGetValidatorsByBlockNumber.java
@@ -17,9 +17,11 @@ package org.hyperledger.besu.consensus.ibft.jsonrpc.methods;
 import org.hyperledger.besu.consensus.common.BlockInterface;
 import org.hyperledger.besu.ethereum.api.jsonrpc.RpcMethod;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.JsonRpcRequestContext;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.exception.InvalidJsonRpcParameters;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.methods.AbstractBlockParameterMethod;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.methods.JsonRpcMethod;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.parameters.BlockParameter;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.RpcErrorType;
 import org.hyperledger.besu.ethereum.api.query.BlockchainQueries;
 import org.hyperledger.besu.ethereum.core.BlockHeader;
 
@@ -50,7 +52,12 @@ public class IbftGetValidatorsByBlockNumber extends AbstractBlockParameterMethod
 
   @Override
   protected BlockParameter blockParameter(final JsonRpcRequestContext request) {
-    return request.getRequiredParameter(0, BlockParameter.class);
+    try {
+      return request.getRequiredParameter(0, BlockParameter.class);
+    } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
+      throw new InvalidJsonRpcParameters(
+          "Invalid block parameter (index 0)", RpcErrorType.INVALID_BLOCK_PARAMS, e);
+    }
   }
 
   @Override
diff --git a/consensus/qbft/src/main/java/org/hyperledger/besu/consensus/qbft/jsonrpc/methods/QbftGetValidatorsByBlockNumber.java b/consensus/qbft/src/main/java/org/hyperledger/besu/consensus/qbft/jsonrpc/methods/QbftGetValidatorsByBlockNumber.java
index 804ecc6b5a..7a64a7ab22 100644
--- a/consensus/qbft/src/main/java/org/hyperledger/besu/consensus/qbft/jsonrpc/methods/QbftGetValidatorsByBlockNumber.java
+++ b/consensus/qbft/src/main/java/org/hyperledger/besu/consensus/qbft/jsonrpc/methods/QbftGetValidatorsByBlockNumber.java
@@ -18,9 +18,11 @@ import org.hyperledger.besu.consensus.common.validator.ValidatorProvider;
 import org.hyperledger.besu.datatypes.Address;
 import org.hyperledger.besu.ethereum.api.jsonrpc.RpcMethod;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.JsonRpcRequestContext;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.exception.InvalidJsonRpcParameters;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.methods.AbstractBlockParameterMethod;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.methods.JsonRpcMethod;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.parameters.BlockParameter;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.RpcErrorType;
 import org.hyperledger.besu.ethereum.api.query.BlockchainQueries;
 import org.hyperledger.besu.ethereum.core.BlockHeader;
 
@@ -50,7 +52,12 @@ public class QbftGetValidatorsByBlockNumber extends AbstractBlockParameterMethod
 
   @Override
   protected BlockParameter blockParameter(final JsonRpcRequestContext request) {
-    return request.getRequiredParameter(0, BlockParameter.class);
+    try {
+      return request.getRequiredParameter(0, BlockParameter.class);
+    } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
+      throw new InvalidJsonRpcParameters(
+          "Invalid block parameter (index 0)", RpcErrorType.INVALID_BLOCK_PARAMS, e);
+    }
   }
 
   @Override
diff --git a/ethereum/api/src/integration-test/java/org/hyperledger/besu/ethereum/api/jsonrpc/methods/fork/frontier/EthGetBlockByNumberIntegrationTest.java b/ethereum/api/src/integration-test/java/org/hyperledger/besu/ethereum/api/jsonrpc/methods/fork/frontier/EthGetBlockByNumberIntegrationTest.java
index a7c3aa254e..9f76609fd7 100644
--- a/ethereum/api/src/integration-test/java/org/hyperledger/besu/ethereum/api/jsonrpc/methods/fork/frontier/EthGetBlockByNumberIntegrationTest.java
+++ b/ethereum/api/src/integration-test/java/org/hyperledger/besu/ethereum/api/jsonrpc/methods/fork/frontier/EthGetBlockByNumberIntegrationTest.java
@@ -410,7 +410,7 @@ public class EthGetBlockByNumberIntegrationTest {
 
     assertThat(thrown)
         .isInstanceOf(InvalidJsonRpcParameters.class)
-        .hasMessageContaining("Invalid json rpc parameter at index 0");
+        .hasMessageContaining("Invalid block parameter");
   }
 
   /** The Tag | Quantity is the first parameter, either a String or a number */
@@ -422,7 +422,7 @@ public class EthGetBlockByNumberIntegrationTest {
 
     assertThat(thrown)
         .isInstanceOf(InvalidJsonRpcParameters.class)
-        .hasMessageContaining("Invalid json rpc parameter at index 0");
+        .hasMessageContaining("Invalid block parameter");
   }
 
   /**
@@ -437,7 +437,6 @@ public class EthGetBlockByNumberIntegrationTest {
 
     assertThat(thrown)
         .isInstanceOf(InvalidJsonRpcParameters.class)
-        .hasNoCause()
         .hasMessage("Missing required json rpc parameter at index 1");
   }
 
@@ -453,8 +452,7 @@ public class EthGetBlockByNumberIntegrationTest {
 
     assertThat(thrown)
         .isInstanceOf(InvalidJsonRpcParameters.class)
-        .hasNoCause()
-        .hasMessage("Missing required json rpc parameter at index 0");
+        .hasMessage("Invalid block parameter (index 0)");
   }
 
   private JsonRpcRequestContext requestWithParams(final Object... params) {
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/DebugReplayBlock.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/DebugReplayBlock.java
index e55a8c4785..6dbf9f586f 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/DebugReplayBlock.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/DebugReplayBlock.java
@@ -19,10 +19,12 @@ import static org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.RpcErr
 
 import org.hyperledger.besu.ethereum.ProtocolContext;
 import org.hyperledger.besu.ethereum.api.jsonrpc.RpcMethod;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.exception.InvalidJsonRpcParameters;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.methods.AbstractBlockParameterMethod;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.parameters.BlockParameter;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.JsonRpcErrorResponse;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.JsonRpcSuccessResponse;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.RpcErrorType;
 import org.hyperledger.besu.ethereum.api.query.BlockchainQueries;
 import org.hyperledger.besu.ethereum.core.Block;
 import org.hyperledger.besu.ethereum.mainnet.HeaderValidationMode;
@@ -56,7 +58,12 @@ public class DebugReplayBlock extends AbstractBlockParameterMethod {
 
   @Override
   protected BlockParameter blockParameter(final JsonRpcRequestContext request) {
-    return request.getRequiredParameter(0, BlockParameter.class);
+    try {
+      return request.getRequiredParameter(0, BlockParameter.class);
+    } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
+      throw new InvalidJsonRpcParameters(
+          "Invalid block parameter (index 0)", RpcErrorType.INVALID_BLOCK_PARAMS, e);
+    }
   }
 
   @Override
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/AbstractTraceByBlock.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/AbstractTraceByBlock.java
index 4fd98cd4fe..a596521175 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/AbstractTraceByBlock.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/AbstractTraceByBlock.java
@@ -17,9 +17,11 @@ package org.hyperledger.besu.ethereum.api.jsonrpc.internal.methods;
 import static org.hyperledger.besu.ethereum.api.jsonrpc.internal.parameters.TraceTypeParameter.TraceType;
 
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.JsonRpcRequestContext;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.exception.InvalidJsonRpcParameters;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.parameters.BlockParameter;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.parameters.TraceTypeParameter;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.processor.TransactionTrace;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.RpcErrorType;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.results.TraceCallResult;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.results.tracing.diff.StateDiffGenerator;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.results.tracing.diff.StateDiffTrace;
@@ -62,8 +64,13 @@ public abstract class AbstractTraceByBlock extends AbstractBlockParameterMethod
 
   @Override
   protected BlockParameter blockParameter(final JsonRpcRequestContext request) {
-    final Optional<BlockParameter> maybeBlockParameter =
-        request.getOptionalParameter(2, BlockParameter.class);
+    final Optional<BlockParameter> maybeBlockParameter;
+    try {
+      maybeBlockParameter = request.getOptionalParameter(2, BlockParameter.class);
+    } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
+      throw new InvalidJsonRpcParameters(
+          "Invalid block parameter (index 2)", RpcErrorType.INVALID_BLOCK_PARAMS, e);
+    }
 
     if (maybeBlockParameter.isPresent()) {
       return maybeBlockParameter.get();
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/AdminGenerateLogBloomCache.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/AdminGenerateLogBloomCache.java
index fd197110b6..437f7f5821 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/AdminGenerateLogBloomCache.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/AdminGenerateLogBloomCache.java
@@ -16,9 +16,11 @@ package org.hyperledger.besu.ethereum.api.jsonrpc.internal.methods;
 
 import org.hyperledger.besu.ethereum.api.jsonrpc.RpcMethod;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.JsonRpcRequestContext;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.exception.InvalidJsonRpcParameters;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.parameters.BlockParameter;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.JsonRpcResponse;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.JsonRpcSuccessResponse;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.RpcErrorType;
 import org.hyperledger.besu.ethereum.api.query.BlockchainQueries;
 
 import java.util.Optional;
@@ -38,8 +40,13 @@ public class AdminGenerateLogBloomCache implements JsonRpcMethod {
 
   @Override
   public JsonRpcResponse response(final JsonRpcRequestContext requestContext) {
-    final Optional<BlockParameter> startBlockParam =
-        requestContext.getOptionalParameter(0, BlockParameter.class);
+    final Optional<BlockParameter> startBlockParam;
+    try {
+      startBlockParam = requestContext.getOptionalParameter(0, BlockParameter.class);
+    } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
+      throw new InvalidJsonRpcParameters(
+          "Invalid start block parameter (index 0)", RpcErrorType.INVALID_BLOCK_PARAMS, e);
+    }
     final long startBlock;
     if (startBlockParam.isEmpty() || startBlockParam.get().isEarliest()) {
       startBlock = 0;
@@ -50,8 +57,13 @@ public class AdminGenerateLogBloomCache implements JsonRpcMethod {
       startBlock = Long.MAX_VALUE;
     }
 
-    final Optional<BlockParameter> stopBlockParam =
-        requestContext.getOptionalParameter(1, BlockParameter.class);
+    final Optional<BlockParameter> stopBlockParam;
+    try {
+      stopBlockParam = requestContext.getOptionalParameter(1, BlockParameter.class);
+    } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
+      throw new InvalidJsonRpcParameters(
+          "Invalid stop block parameter (index 1)", RpcErrorType.INVALID_BLOCK_PARAMS, e);
+    }
     final long stopBlock;
     if (stopBlockParam.isEmpty()) {
       if (startBlockParam.isEmpty()) {
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugAccountAt.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugAccountAt.java
index 8fafd5ec3d..550a25982d 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugAccountAt.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugAccountAt.java
@@ -67,7 +67,12 @@ public class DebugAccountAt extends AbstractBlockParameterOrBlockHashMethod {
   @Override
   protected BlockParameterOrBlockHash blockParameterOrBlockHash(
       final JsonRpcRequestContext requestContext) {
-    return requestContext.getRequiredParameter(0, BlockParameterOrBlockHash.class);
+    try {
+      return requestContext.getRequiredParameter(0, BlockParameterOrBlockHash.class);
+    } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
+      throw new InvalidJsonRpcParameters(
+          "Invalid block or block hash parameter (index 0)", RpcErrorType.INVALID_BLOCK_PARAMS, e);
+    }
   }
 
   @Override
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugAccountRange.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugAccountRange.java
index 32ed9c5611..c891bde56a 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugAccountRange.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugAccountRange.java
@@ -58,8 +58,16 @@ public class DebugAccountRange implements JsonRpcMethod {
 
   @Override
   public JsonRpcResponse response(final JsonRpcRequestContext requestContext) {
-    final BlockParameterOrBlockHash blockParameterOrBlockHash =
-        requestContext.getRequiredParameter(0, BlockParameterOrBlockHash.class);
+    final BlockParameterOrBlockHash blockParameterOrBlockHash;
+    try {
+      blockParameterOrBlockHash =
+          requestContext.getRequiredParameter(0, BlockParameterOrBlockHash.class);
+    } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
+      throw new InvalidJsonRpcParameters(
+          "Invalid block parameter or block hash parameter (index 0)",
+          RpcErrorType.INVALID_BLOCK_PARAMS,
+          e);
+    }
     final String addressHash;
     try {
       addressHash = requestContext.getRequiredParameter(2, String.class);
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugGetRawBlock.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugGetRawBlock.java
index cec275e5a6..28d886bd81 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugGetRawBlock.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugGetRawBlock.java
@@ -16,6 +16,7 @@ package org.hyperledger.besu.ethereum.api.jsonrpc.internal.methods;
 
 import org.hyperledger.besu.ethereum.api.jsonrpc.RpcMethod;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.JsonRpcRequestContext;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.exception.InvalidJsonRpcParameters;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.parameters.BlockParameter;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.JsonRpcErrorResponse;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.RpcErrorType;
@@ -37,7 +38,12 @@ public class DebugGetRawBlock extends AbstractBlockParameterMethod {
 
   @Override
   protected BlockParameter blockParameter(final JsonRpcRequestContext request) {
-    return request.getRequiredParameter(0, BlockParameter.class);
+    try {
+      return request.getRequiredParameter(0, BlockParameter.class);
+    } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
+      throw new InvalidJsonRpcParameters(
+          "Invalid block parameter (index 0)", RpcErrorType.INVALID_BLOCK_PARAMS, e);
+    }
   }
 
   @Override
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugGetRawHeader.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugGetRawHeader.java
index 05ef0eb53d..e2f2c89e1a 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugGetRawHeader.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugGetRawHeader.java
@@ -16,6 +16,7 @@ package org.hyperledger.besu.ethereum.api.jsonrpc.internal.methods;
 
 import org.hyperledger.besu.ethereum.api.jsonrpc.RpcMethod;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.JsonRpcRequestContext;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.exception.InvalidJsonRpcParameters;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.parameters.BlockParameter;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.JsonRpcErrorResponse;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.RpcErrorType;
@@ -37,7 +38,12 @@ public class DebugGetRawHeader extends AbstractBlockParameterMethod {
 
   @Override
   protected BlockParameter blockParameter(final JsonRpcRequestContext request) {
-    return request.getRequiredParameter(0, BlockParameter.class);
+    try {
+      return request.getRequiredParameter(0, BlockParameter.class);
+    } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
+      throw new InvalidJsonRpcParameters(
+          "Invalid block parameter (index 0)", RpcErrorType.INVALID_BLOCK_PARAMS, e);
+    }
   }
 
   @Override
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugGetRawReceipts.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugGetRawReceipts.java
index 7965480c6f..cddba5086e 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugGetRawReceipts.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugGetRawReceipts.java
@@ -17,7 +17,9 @@ package org.hyperledger.besu.ethereum.api.jsonrpc.internal.methods;
 import org.hyperledger.besu.datatypes.Hash;
 import org.hyperledger.besu.ethereum.api.jsonrpc.RpcMethod;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.JsonRpcRequestContext;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.exception.InvalidJsonRpcParameters;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.parameters.BlockParameterOrBlockHash;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.RpcErrorType;
 import org.hyperledger.besu.ethereum.api.query.BlockchainQueries;
 import org.hyperledger.besu.ethereum.core.TransactionReceipt;
 import org.hyperledger.besu.ethereum.rlp.RLP;
@@ -40,7 +42,12 @@ public class DebugGetRawReceipts extends AbstractBlockParameterOrBlockHashMethod
   @Override
   protected BlockParameterOrBlockHash blockParameterOrBlockHash(
       final JsonRpcRequestContext request) {
-    return request.getRequiredParameter(0, BlockParameterOrBlockHash.class);
+    try {
+      return request.getRequiredParameter(0, BlockParameterOrBlockHash.class);
+    } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
+      throw new InvalidJsonRpcParameters(
+          "Invalid block or block hash parameter (index 0)", RpcErrorType.INVALID_BLOCK_PARAMS, e);
+    }
   }
 
   @Override
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugSetHead.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugSetHead.java
index 7d26eaca25..a3b423675f 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugSetHead.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugSetHead.java
@@ -20,9 +20,11 @@ import org.hyperledger.besu.datatypes.Hash;
 import org.hyperledger.besu.ethereum.ProtocolContext;
 import org.hyperledger.besu.ethereum.api.jsonrpc.RpcMethod;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.JsonRpcRequestContext;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.exception.InvalidJsonRpcParameters;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.parameters.BlockParameter;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.JsonRpcErrorResponse;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.JsonRpcSuccessResponse;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.RpcErrorType;
 import org.hyperledger.besu.ethereum.api.query.BlockchainQueries;
 
 import java.util.Optional;
@@ -43,7 +45,12 @@ public class DebugSetHead extends AbstractBlockParameterMethod {
 
   @Override
   protected BlockParameter blockParameter(final JsonRpcRequestContext request) {
-    return request.getRequiredParameter(0, BlockParameter.class);
+    try {
+      return request.getRequiredParameter(0, BlockParameter.class);
+    } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
+      throw new InvalidJsonRpcParameters(
+          "Invalid block parameter (index 0)", RpcErrorType.INVALID_BLOCK_PARAMS, e);
+    }
   }
 
   @Override
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugStorageRangeAt.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugStorageRangeAt.java
index 72110852b7..9f0f2f0b1e 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugStorageRangeAt.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugStorageRangeAt.java
@@ -69,8 +69,14 @@ public class DebugStorageRangeAt implements JsonRpcMethod {
 
   @Override
   public JsonRpcResponse response(final JsonRpcRequestContext requestContext) {
-    final BlockParameterOrBlockHash blockParameterOrBlockHash =
-        requestContext.getRequiredParameter(0, BlockParameterOrBlockHash.class);
+    final BlockParameterOrBlockHash blockParameterOrBlockHash;
+    try {
+      blockParameterOrBlockHash =
+          requestContext.getRequiredParameter(0, BlockParameterOrBlockHash.class);
+    } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
+      throw new InvalidJsonRpcParameters(
+          "Invalid block or block hash parameter (index 0)", RpcErrorType.INVALID_BLOCK_PARAMS, e);
+    }
     final int transactionIndex = requestContext.getRequiredParameter(1, Integer.class);
     final Address accountAddress;
     try {
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugTraceBlock.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugTraceBlock.java
index 3a1dee6560..44cbf153de 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugTraceBlock.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugTraceBlock.java
@@ -16,6 +16,7 @@ package org.hyperledger.besu.ethereum.api.jsonrpc.internal.methods;
 
 import org.hyperledger.besu.ethereum.api.jsonrpc.RpcMethod;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.JsonRpcRequestContext;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.exception.InvalidJsonRpcParameters;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.parameters.TransactionTraceParams;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.processor.BlockTrace;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.processor.BlockTracer;
@@ -69,9 +70,12 @@ public class DebugTraceBlock implements JsonRpcMethod {
     try {
       block = Block.readFrom(RLP.input(Bytes.fromHexString(input)), this.blockHeaderFunctions);
     } catch (final RLPException e) {
-      LOG.debug("Failed to parse block RLP", e);
+      LOG.debug("Failed to parse block RLP (index 0)", e);
       return new JsonRpcErrorResponse(
-          requestContext.getRequest().getId(), RpcErrorType.INVALID_PARAMS);
+          requestContext.getRequest().getId(), RpcErrorType.INVALID_BLOCK_PARAMS);
+    } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
+      throw new InvalidJsonRpcParameters(
+          "Invalid block params (index 0)", RpcErrorType.INVALID_BLOCK_PARAMS, e);
     }
     final TraceOptions traceOptions =
         requestContext
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugTraceBlockByNumber.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugTraceBlockByNumber.java
index 32d0e02f90..dce3ab1ebf 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugTraceBlockByNumber.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugTraceBlockByNumber.java
@@ -17,11 +17,13 @@ package org.hyperledger.besu.ethereum.api.jsonrpc.internal.methods;
 import org.hyperledger.besu.datatypes.Hash;
 import org.hyperledger.besu.ethereum.api.jsonrpc.RpcMethod;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.JsonRpcRequestContext;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.exception.InvalidJsonRpcParameters;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.parameters.BlockParameter;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.parameters.TransactionTraceParams;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.processor.BlockTrace;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.processor.BlockTracer;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.processor.Tracer;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.RpcErrorType;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.results.DebugTraceTransactionResult;
 import org.hyperledger.besu.ethereum.api.query.BlockchainQueries;
 import org.hyperledger.besu.ethereum.debug.TraceOptions;
@@ -47,7 +49,12 @@ public class DebugTraceBlockByNumber extends AbstractBlockParameterMethod {
 
   @Override
   protected BlockParameter blockParameter(final JsonRpcRequestContext request) {
-    return request.getRequiredParameter(0, BlockParameter.class);
+    try {
+      return request.getRequiredParameter(0, BlockParameter.class);
+    } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
+      throw new InvalidJsonRpcParameters(
+          "Invalid block parameter (index 0)", RpcErrorType.INVALID_BLOCK_PARAMS, e);
+    }
   }
 
   @Override
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugTraceCall.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugTraceCall.java
index 0243398833..9de8108e67 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugTraceCall.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugTraceCall.java
@@ -18,11 +18,13 @@ import static org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.RpcErr
 
 import org.hyperledger.besu.ethereum.api.jsonrpc.RpcMethod;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.JsonRpcRequestContext;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.exception.InvalidJsonRpcParameters;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.parameters.BlockParameter;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.parameters.TransactionTraceParams;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.processor.TransactionTrace;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.JsonRpcError;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.JsonRpcErrorResponse;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.RpcErrorType;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.results.DebugTraceTransactionResult;
 import org.hyperledger.besu.ethereum.api.query.BlockchainQueries;
 import org.hyperledger.besu.ethereum.debug.TraceOptions;
@@ -61,8 +63,13 @@ public class DebugTraceCall extends AbstractTraceCall {
 
   @Override
   protected BlockParameter blockParameter(final JsonRpcRequestContext request) {
-    final Optional<BlockParameter> maybeBlockParameter =
-        request.getOptionalParameter(1, BlockParameter.class);
+    final Optional<BlockParameter> maybeBlockParameter;
+    try {
+      maybeBlockParameter = request.getOptionalParameter(1, BlockParameter.class);
+    } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
+      throw new InvalidJsonRpcParameters(
+          "Invalid block parameter (index 1)", RpcErrorType.INVALID_BLOCK_PARAMS, e);
+    }
 
     return maybeBlockParameter.orElse(BlockParameter.LATEST);
   }
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthCall.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthCall.java
index c645bab453..a08b17dfc6 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthCall.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthCall.java
@@ -22,6 +22,7 @@ import org.hyperledger.besu.datatypes.Wei;
 import org.hyperledger.besu.ethereum.api.jsonrpc.JsonRpcErrorConverter;
 import org.hyperledger.besu.ethereum.api.jsonrpc.RpcMethod;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.JsonRpcRequestContext;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.exception.InvalidJsonRpcParameters;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.parameters.BlockParameterOrBlockHash;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.parameters.JsonCallParameter;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.JsonRpcError;
@@ -57,7 +58,12 @@ public class EthCall extends AbstractBlockParameterOrBlockHashMethod {
   @Override
   protected BlockParameterOrBlockHash blockParameterOrBlockHash(
       final JsonRpcRequestContext request) {
-    return request.getRequiredParameter(1, BlockParameterOrBlockHash.class);
+    try {
+      return request.getRequiredParameter(1, BlockParameterOrBlockHash.class);
+    } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
+      throw new InvalidJsonRpcParameters(
+          "Invalid block or block hash parameters (index 1)", RpcErrorType.INVALID_BLOCK_PARAMS, e);
+    }
   }
 
   @Override
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthFeeHistory.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthFeeHistory.java
index 6bea493d31..26e414acda 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthFeeHistory.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthFeeHistory.java
@@ -22,6 +22,7 @@ import org.hyperledger.besu.datatypes.Wei;
 import org.hyperledger.besu.ethereum.api.ApiConfiguration;
 import org.hyperledger.besu.ethereum.api.jsonrpc.RpcMethod;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.JsonRpcRequestContext;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.exception.InvalidJsonRpcParameters;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.parameters.BlockParameter;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.parameters.UnsignedIntParameter;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.JsonRpcErrorResponse;
@@ -91,7 +92,13 @@ public class EthFeeHistory implements JsonRpcMethod {
     if (isInvalidBlockCount(blockCount)) {
       return new JsonRpcErrorResponse(requestId, RpcErrorType.INVALID_PARAMS);
     }
-    final BlockParameter highestBlock = request.getRequiredParameter(1, BlockParameter.class);
+    final BlockParameter highestBlock;
+    try {
+      highestBlock = request.getRequiredParameter(1, BlockParameter.class);
+    } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
+      throw new InvalidJsonRpcParameters(
+          "Invalid highest block parameter (index 1)", RpcErrorType.INVALID_BLOCK_PARAMS, e);
+    }
     final Optional<List<Double>> maybeRewardPercentiles =
         request.getOptionalParameter(2, Double[].class).map(Arrays::asList);
 
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBalance.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBalance.java
index 449de64261..e863626c96 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBalance.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBalance.java
@@ -43,7 +43,12 @@ public class EthGetBalance extends AbstractBlockParameterOrBlockHashMethod {
   @Override
   protected BlockParameterOrBlockHash blockParameterOrBlockHash(
       final JsonRpcRequestContext request) {
-    return request.getRequiredParameter(1, BlockParameterOrBlockHash.class);
+    try {
+      return request.getRequiredParameter(1, BlockParameterOrBlockHash.class);
+    } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
+      throw new InvalidJsonRpcParameters(
+          "Invalid block or block hash parameter (index 1)", RpcErrorType.INVALID_BLOCK_PARAMS, e);
+    }
   }
 
   @Override
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBlockByNumber.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBlockByNumber.java
index c1bdcc37dd..19ad9a51ad 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBlockByNumber.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBlockByNumber.java
@@ -17,7 +17,9 @@ package org.hyperledger.besu.ethereum.api.jsonrpc.internal.methods;
 import org.hyperledger.besu.datatypes.Hash;
 import org.hyperledger.besu.ethereum.api.jsonrpc.RpcMethod;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.JsonRpcRequestContext;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.exception.InvalidJsonRpcParameters;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.parameters.BlockParameter;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.RpcErrorType;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.results.BlockResult;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.results.BlockResultFactory;
 import org.hyperledger.besu.ethereum.api.query.BlockchainQueries;
@@ -62,7 +64,12 @@ public class EthGetBlockByNumber extends AbstractBlockParameterMethod {
 
   @Override
   protected BlockParameter blockParameter(final JsonRpcRequestContext request) {
-    return request.getRequiredParameter(0, BlockParameter.class);
+    try {
+      return request.getRequiredParameter(0, BlockParameter.class);
+    } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
+      throw new InvalidJsonRpcParameters(
+          "Invalid block parameter (index 0)", RpcErrorType.INVALID_BLOCK_PARAMS, e);
+    }
   }
 
   @Override
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBlockReceipts.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBlockReceipts.java
index 54a3733286..d9592db8c1 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBlockReceipts.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBlockReceipts.java
@@ -17,7 +17,9 @@ package org.hyperledger.besu.ethereum.api.jsonrpc.internal.methods;
 import org.hyperledger.besu.datatypes.Hash;
 import org.hyperledger.besu.ethereum.api.jsonrpc.RpcMethod;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.JsonRpcRequestContext;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.exception.InvalidJsonRpcParameters;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.parameters.BlockParameterOrBlockHash;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.RpcErrorType;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.results.BlockReceiptsResult;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.results.TransactionReceiptResult;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.results.TransactionReceiptRootResult;
@@ -53,7 +55,12 @@ public class EthGetBlockReceipts extends AbstractBlockParameterOrBlockHashMethod
   @Override
   protected BlockParameterOrBlockHash blockParameterOrBlockHash(
       final JsonRpcRequestContext request) {
-    return request.getRequiredParameter(0, BlockParameterOrBlockHash.class);
+    try {
+      return request.getRequiredParameter(0, BlockParameterOrBlockHash.class);
+    } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
+      throw new InvalidJsonRpcParameters(
+          "Invalid block or block hash parameters (index 0)", RpcErrorType.INVALID_BLOCK_PARAMS, e);
+    }
   }
 
   @Override
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBlockTransactionCountByNumber.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBlockTransactionCountByNumber.java
index b6819c7510..2a068a6174 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBlockTransactionCountByNumber.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBlockTransactionCountByNumber.java
@@ -16,7 +16,9 @@ package org.hyperledger.besu.ethereum.api.jsonrpc.internal.methods;
 
 import org.hyperledger.besu.ethereum.api.jsonrpc.RpcMethod;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.JsonRpcRequestContext;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.exception.InvalidJsonRpcParameters;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.parameters.BlockParameter;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.RpcErrorType;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.results.Quantity;
 import org.hyperledger.besu.ethereum.api.query.BlockchainQueries;
 
@@ -33,7 +35,12 @@ public class EthGetBlockTransactionCountByNumber extends AbstractBlockParameterM
 
   @Override
   protected BlockParameter blockParameter(final JsonRpcRequestContext request) {
-    return request.getRequiredParameter(0, BlockParameter.class);
+    try {
+      return request.getRequiredParameter(0, BlockParameter.class);
+    } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
+      throw new InvalidJsonRpcParameters(
+          "Invalid block parameters (index 0)", RpcErrorType.INVALID_BLOCK_PARAMS, e);
+    }
   }
 
   @Override
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetCode.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetCode.java
index 9002b6d89c..8a9881a012 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetCode.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetCode.java
@@ -45,7 +45,12 @@ public class EthGetCode extends AbstractBlockParameterOrBlockHashMethod {
   @Override
   protected BlockParameterOrBlockHash blockParameterOrBlockHash(
       final JsonRpcRequestContext request) {
-    return request.getRequiredParameter(1, BlockParameterOrBlockHash.class);
+    try {
+      return request.getRequiredParameter(1, BlockParameterOrBlockHash.class);
+    } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
+      throw new InvalidJsonRpcParameters(
+          "Invalid block or block hash parameter (index 1)", RpcErrorType.INVALID_BLOCK_PARAMS, e);
+    }
   }
 
   @Override
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetMinerDataByBlockNumber.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetMinerDataByBlockNumber.java
index 83ca008890..c2df712686 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetMinerDataByBlockNumber.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetMinerDataByBlockNumber.java
@@ -17,7 +17,9 @@ package org.hyperledger.besu.ethereum.api.jsonrpc.internal.methods;
 import org.hyperledger.besu.datatypes.Hash;
 import org.hyperledger.besu.ethereum.api.jsonrpc.RpcMethod;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.JsonRpcRequestContext;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.exception.InvalidJsonRpcParameters;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.parameters.BlockParameter;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.RpcErrorType;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.results.MinerDataResult;
 import org.hyperledger.besu.ethereum.api.query.BlockWithMetadata;
 import org.hyperledger.besu.ethereum.api.query.BlockchainQueries;
@@ -40,7 +42,12 @@ public class EthGetMinerDataByBlockNumber extends AbstractBlockParameterMethod {
 
   @Override
   protected BlockParameter blockParameter(final JsonRpcRequestContext request) {
-    return request.getRequiredParameter(0, BlockParameter.class);
+    try {
+      return request.getRequiredParameter(0, BlockParameter.class);
+    } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
+      throw new InvalidJsonRpcParameters(
+          "Invalid block parameter (index 0)", RpcErrorType.INVALID_BLOCK_PARAMS, e);
+    }
   }
 
   @Override
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetProof.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetProof.java
index 67a0792408..a20cd62f29 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetProof.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetProof.java
@@ -49,7 +49,12 @@ public class EthGetProof extends AbstractBlockParameterOrBlockHashMethod {
   @Override
   protected BlockParameterOrBlockHash blockParameterOrBlockHash(
       final JsonRpcRequestContext request) {
-    return request.getRequiredParameter(2, BlockParameterOrBlockHash.class);
+    try {
+      return request.getRequiredParameter(2, BlockParameterOrBlockHash.class);
+    } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
+      throw new InvalidJsonRpcParameters(
+          "Invalid block or block hash parameter (index 2)", RpcErrorType.INVALID_BLOCK_PARAMS, e);
+    }
   }
 
   @Override
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetStorageAt.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetStorageAt.java
index efec2ee1d6..7b84365b56 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetStorageAt.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetStorageAt.java
@@ -39,7 +39,12 @@ public class EthGetStorageAt extends AbstractBlockParameterOrBlockHashMethod {
   @Override
   protected BlockParameterOrBlockHash blockParameterOrBlockHash(
       final JsonRpcRequestContext request) {
-    return request.getRequiredParameter(2, BlockParameterOrBlockHash.class);
+    try {
+      return request.getRequiredParameter(2, BlockParameterOrBlockHash.class);
+    } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
+      throw new InvalidJsonRpcParameters(
+          "Invalid block or block hash parameter (index 2)", RpcErrorType.INVALID_BLOCK_PARAMS, e);
+    }
   }
 
   @Override
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetTransactionByBlockNumberAndIndex.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetTransactionByBlockNumberAndIndex.java
index ab08127ca7..6a419d35c5 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetTransactionByBlockNumberAndIndex.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetTransactionByBlockNumberAndIndex.java
@@ -16,8 +16,10 @@ package org.hyperledger.besu.ethereum.api.jsonrpc.internal.methods;
 
 import org.hyperledger.besu.ethereum.api.jsonrpc.RpcMethod;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.JsonRpcRequestContext;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.exception.InvalidJsonRpcParameters;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.parameters.BlockParameter;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.parameters.UnsignedIntParameter;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.RpcErrorType;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.results.TransactionCompleteResult;
 import org.hyperledger.besu.ethereum.api.query.BlockchainQueries;
 import org.hyperledger.besu.ethereum.api.query.TransactionWithMetadata;
@@ -37,7 +39,12 @@ public class EthGetTransactionByBlockNumberAndIndex extends AbstractBlockParamet
 
   @Override
   protected BlockParameter blockParameter(final JsonRpcRequestContext request) {
-    return request.getRequiredParameter(0, BlockParameter.class);
+    try {
+      return request.getRequiredParameter(0, BlockParameter.class);
+    } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
+      throw new InvalidJsonRpcParameters(
+          "Invalid block parameter (index 0)", RpcErrorType.INVALID_BLOCK_PARAMS, e);
+    }
   }
 
   @Override
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetTransactionCount.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetTransactionCount.java
index a03d90ea29..a9916099ea 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetTransactionCount.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetTransactionCount.java
@@ -52,7 +52,12 @@ public class EthGetTransactionCount extends AbstractBlockParameterOrBlockHashMet
   @Override
   protected BlockParameterOrBlockHash blockParameterOrBlockHash(
       final JsonRpcRequestContext request) {
-    return request.getRequiredParameter(1, BlockParameterOrBlockHash.class);
+    try {
+      return request.getRequiredParameter(1, BlockParameterOrBlockHash.class);
+    } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
+      throw new InvalidJsonRpcParameters(
+          "Invalid block or block hash parameter (index 1)", RpcErrorType.INVALID_BLOCK_PARAMS, e);
+    }
   }
 
   @Override
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetUncleByBlockNumberAndIndex.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetUncleByBlockNumberAndIndex.java
index 2687982b8e..d2ac0b26af 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetUncleByBlockNumberAndIndex.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetUncleByBlockNumberAndIndex.java
@@ -16,8 +16,10 @@ package org.hyperledger.besu.ethereum.api.jsonrpc.internal.methods;
 
 import org.hyperledger.besu.ethereum.api.jsonrpc.RpcMethod;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.JsonRpcRequestContext;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.exception.InvalidJsonRpcParameters;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.parameters.BlockParameter;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.parameters.UnsignedIntParameter;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.RpcErrorType;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.results.BlockResult;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.results.UncleBlockResult;
 import org.hyperledger.besu.ethereum.api.query.BlockchainQueries;
@@ -35,7 +37,12 @@ public class EthGetUncleByBlockNumberAndIndex extends AbstractBlockParameterMeth
 
   @Override
   protected BlockParameter blockParameter(final JsonRpcRequestContext request) {
-    return request.getRequiredParameter(0, BlockParameter.class);
+    try {
+      return request.getRequiredParameter(0, BlockParameter.class);
+    } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
+      throw new InvalidJsonRpcParameters(
+          "Invalid block parameter (index 0)", RpcErrorType.INVALID_BLOCK_PARAMS, e);
+    }
   }
 
   @Override
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthSendRawTransaction.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthSendRawTransaction.java
index 5fbfc80a98..e79c0b60b7 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthSendRawTransaction.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthSendRawTransaction.java
@@ -86,7 +86,7 @@ public class EthSendRawTransaction implements JsonRpcMethod {
     } catch (final RLPException e) {
       LOG.debug("RLPException: {} caused by {}", e.getMessage(), e.getCause());
       return new JsonRpcErrorResponse(
-          requestContext.getRequest().getId(), RpcErrorType.INVALID_PARAMS);
+          requestContext.getRequest().getId(), RpcErrorType.INVALID_BLOCK_PARAMS);
     } catch (final InvalidJsonRpcRequestException i) {
       LOG.debug("InvalidJsonRpcRequestException: {} caused by {}", i.getMessage(), i.getCause());
       return new JsonRpcErrorResponse(
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/TraceBlock.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/TraceBlock.java
index cd78d837df..5ec46e08cc 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/TraceBlock.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/TraceBlock.java
@@ -18,10 +18,12 @@ import static org.hyperledger.besu.services.pipeline.PipelineBuilder.createPipel
 
 import org.hyperledger.besu.ethereum.api.jsonrpc.RpcMethod;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.JsonRpcRequestContext;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.exception.InvalidJsonRpcParameters;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.parameters.BlockParameter;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.parameters.FilterParameter;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.processor.Tracer;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.processor.TransactionTrace;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.RpcErrorType;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.results.tracing.flat.FlatTraceGenerator;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.results.tracing.flat.RewardTraceGenerator;
 import org.hyperledger.besu.ethereum.api.query.BlockchainQueries;
@@ -68,7 +70,12 @@ public class TraceBlock extends AbstractBlockParameterMethod {
 
   @Override
   protected BlockParameter blockParameter(final JsonRpcRequestContext request) {
-    return request.getRequiredParameter(0, BlockParameter.class);
+    try {
+      return request.getRequiredParameter(0, BlockParameter.class);
+    } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
+      throw new InvalidJsonRpcParameters(
+          "Invalid block parameter (index 0)", RpcErrorType.INVALID_BLOCK_PARAMS, e);
+    }
   }
 
   @Override
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/TraceCallMany.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/TraceCallMany.java
index 3e3b0c9343..8dabd29a3e 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/TraceCallMany.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/TraceCallMany.java
@@ -19,6 +19,7 @@ import static org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.RpcErr
 
 import org.hyperledger.besu.ethereum.api.jsonrpc.RpcMethod;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.JsonRpcRequestContext;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.exception.InvalidJsonRpcParameters;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.parameters.BlockParameter;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.parameters.JsonCallParameter;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.parameters.TraceCallManyParameter;
@@ -63,8 +64,13 @@ public class TraceCallMany extends TraceCall implements JsonRpcMethod {
 
   @Override
   protected BlockParameter blockParameter(final JsonRpcRequestContext request) {
-    final Optional<BlockParameter> maybeBlockParameter =
-        request.getOptionalParameter(1, BlockParameter.class);
+    final Optional<BlockParameter> maybeBlockParameter;
+    try {
+      maybeBlockParameter = request.getOptionalParameter(1, BlockParameter.class);
+    } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
+      throw new InvalidJsonRpcParameters(
+          "Invalid block parameter (index 1)", RpcErrorType.INVALID_BLOCK_PARAMS, e);
+    }
 
     return maybeBlockParameter.orElse(BlockParameter.LATEST);
   }
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/TraceReplayBlockTransactions.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/TraceReplayBlockTransactions.java
index 058fbd4796..50e580cd86 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/TraceReplayBlockTransactions.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/TraceReplayBlockTransactions.java
@@ -18,11 +18,13 @@ import static org.hyperledger.besu.services.pipeline.PipelineBuilder.createPipel
 
 import org.hyperledger.besu.ethereum.api.jsonrpc.RpcMethod;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.JsonRpcRequestContext;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.exception.InvalidJsonRpcParameters;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.methods.TraceBlock.ChainUpdater;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.parameters.BlockParameter;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.parameters.TraceTypeParameter;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.processor.Tracer;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.processor.TransactionTrace;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.RpcErrorType;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.results.TraceReplayResult;
 import org.hyperledger.besu.ethereum.api.query.BlockchainQueries;
 import org.hyperledger.besu.ethereum.api.util.ArrayNodeWrapper;
@@ -70,7 +72,12 @@ public class TraceReplayBlockTransactions extends AbstractBlockParameterMethod {
 
   @Override
   protected BlockParameter blockParameter(final JsonRpcRequestContext request) {
-    return request.getRequiredParameter(0, BlockParameter.class);
+    try {
+      return request.getRequiredParameter(0, BlockParameter.class);
+    } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
+      throw new InvalidJsonRpcParameters(
+          "Invalid block parameter (index 0)", RpcErrorType.INVALID_BLOCK_PARAMS, e);
+    }
   }
 
   @Override
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/privacy/methods/priv/PrivCall.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/privacy/methods/priv/PrivCall.java
index 31469530b0..8fe48474a8 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/privacy/methods/priv/PrivCall.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/privacy/methods/priv/PrivCall.java
@@ -53,7 +53,12 @@ public class PrivCall extends AbstractBlockParameterMethod {
 
   @Override
   protected BlockParameter blockParameter(final JsonRpcRequestContext request) {
-    return request.getRequiredParameter(2, BlockParameter.class);
+    try {
+      return request.getRequiredParameter(2, BlockParameter.class);
+    } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
+      throw new InvalidJsonRpcParameters(
+          "Invalid block parameter (index 2)", RpcErrorType.INVALID_BLOCK_PARAMS, e);
+    }
   }
 
   @Override
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/privacy/methods/priv/PrivDebugGetStateRoot.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/privacy/methods/priv/PrivDebugGetStateRoot.java
index 6ccc9630f9..b6ea645dc3 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/privacy/methods/priv/PrivDebugGetStateRoot.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/privacy/methods/priv/PrivDebugGetStateRoot.java
@@ -20,6 +20,7 @@ import org.hyperledger.besu.enclave.EnclaveClientException;
 import org.hyperledger.besu.enclave.types.PrivacyGroup;
 import org.hyperledger.besu.ethereum.api.jsonrpc.RpcMethod;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.JsonRpcRequestContext;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.exception.InvalidJsonRpcParameters;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.methods.AbstractBlockParameterMethod;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.parameters.BlockParameter;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.privacy.methods.PrivacyIdProvider;
@@ -60,7 +61,12 @@ public class PrivDebugGetStateRoot extends AbstractBlockParameterMethod {
 
   @Override
   protected BlockParameter blockParameter(final JsonRpcRequestContext request) {
-    return request.getRequiredParameter(1, BlockParameter.class);
+    try {
+      return request.getRequiredParameter(1, BlockParameter.class);
+    } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
+      throw new InvalidJsonRpcParameters(
+          "Invalid block parameter (index 1)", RpcErrorType.INVALID_BLOCK_PARAMS, e);
+    }
   }
 
   @Override
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/privacy/methods/priv/PrivGetCode.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/privacy/methods/priv/PrivGetCode.java
index 56318da37e..0010b8e052 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/privacy/methods/priv/PrivGetCode.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/privacy/methods/priv/PrivGetCode.java
@@ -48,7 +48,12 @@ public class PrivGetCode extends AbstractBlockParameterMethod {
 
   @Override
   protected BlockParameter blockParameter(final JsonRpcRequestContext request) {
-    return request.getRequiredParameter(2, BlockParameter.class);
+    try {
+      return request.getRequiredParameter(2, BlockParameter.class);
+    } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
+      throw new InvalidJsonRpcParameters(
+          "Invalid block parameter (index 2)", RpcErrorType.INVALID_BLOCK_PARAMS, e);
+    }
   }
 
   @Override
diff --git a/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/JsonRpcHttpServiceTest.java b/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/JsonRpcHttpServiceTest.java
index 7c3157d223..96b9b9f779 100644
--- a/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/JsonRpcHttpServiceTest.java
+++ b/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/JsonRpcHttpServiceTest.java
@@ -980,7 +980,7 @@ public class JsonRpcHttpServiceTest extends JsonRpcHttpServiceTestBase {
       // Check general format of result
       final String respBody = resp.body().string();
       final JsonObject json = new JsonObject(respBody);
-      final RpcErrorType expectedError = RpcErrorType.INVALID_PARAMS;
+      final RpcErrorType expectedError = RpcErrorType.INVALID_BLOCK_PARAMS;
       testHelper.assertValidJsonRpcError(
           json, id, expectedError.getCode(), expectedError.getMessage());
     }
diff --git a/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBlockByNumberTest.java b/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBlockByNumberTest.java
index b12cdbe22f..e283759380 100644
--- a/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBlockByNumberTest.java
+++ b/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBlockByNumberTest.java
@@ -129,8 +129,7 @@ public class EthGetBlockByNumberTest {
   public void exceptionWhenNumberParamInvalid() {
     assertThatThrownBy(() -> method.response(requestWithParams("invalid", "true")))
         .isInstanceOf(InvalidJsonRpcParameters.class)
-        .hasMessage(
-            "Invalid json rpc parameter at index 0. Supplied value was: 'invalid' of type: 'java.lang.String' - expected type: 'org.hyperledger.besu.ethereum.api.jsonrpc.internal.parameters.BlockParameter'");
+        .hasMessage("Invalid block parameter (index 0)");
     verifyNoMoreInteractions(blockchainQueries);
   }
 
diff --git a/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBlockReceiptsTest.java b/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBlockReceiptsTest.java
index 5e8ad1455d..545b43a6e7 100644
--- a/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBlockReceiptsTest.java
+++ b/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBlockReceiptsTest.java
@@ -100,7 +100,7 @@ public class EthGetBlockReceiptsTest {
   public void exceptionWhenNoParamsSupplied() {
     assertThatThrownBy(() -> method.response(requestWithParams()))
         .isInstanceOf(InvalidJsonRpcParameters.class)
-        .hasMessage("Missing required json rpc parameter at index 0");
+        .hasMessage("Invalid block or block hash parameters (index 0)");
     verifyNoMoreInteractions(blockchainQueries);
   }
 
diff --git a/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetMinerDataByBlockNumberTest.java b/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetMinerDataByBlockNumberTest.java
index ca65fcf42a..9295e64da9 100644
--- a/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetMinerDataByBlockNumberTest.java
+++ b/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetMinerDataByBlockNumberTest.java
@@ -103,7 +103,7 @@ public class EthGetMinerDataByBlockNumberTest {
     JsonRpcRequestContext requestContext = new JsonRpcRequestContext(request);
     assertThatThrownBy(() -> method.response(requestContext))
         .isInstanceOf(InvalidJsonRpcParameters.class)
-        .hasMessage("Missing required json rpc parameter at index 0");
+        .hasMessage("Invalid block parameter (index 0)");
 
     verifyNoMoreInteractions(blockchainQueries);
   }
@@ -114,7 +114,7 @@ public class EthGetMinerDataByBlockNumberTest {
     JsonRpcRequestContext requestContext = new JsonRpcRequestContext(request);
     assertThatThrownBy(() -> method.response(requestContext))
         .isInstanceOf(InvalidJsonRpcParameters.class)
-        .hasMessageContaining("Invalid json rpc parameter at index 0");
+        .hasMessageContaining("Invalid block parameter");
 
     verifyNoMoreInteractions(blockchainQueries);
   }
diff --git a/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetProofTest.java b/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetProofTest.java
index 344ee39d80..3cf24df3d4 100644
--- a/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetProofTest.java
+++ b/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetProofTest.java
@@ -129,7 +129,7 @@ class EthGetProofTest {
 
     Assertions.assertThatThrownBy(() -> method.response(request))
         .isInstanceOf(InvalidJsonRpcParameters.class)
-        .hasMessageContaining("Missing required json rpc parameter at index 2");
+        .hasMessageContaining("Invalid block or block hash parameter");
   }
 
   @Test
diff --git a/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetUncleByBlockNumberAndIndexTest.java b/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetUncleByBlockNumberAndIndexTest.java
index 59b20d5846..06c7408a84 100644
--- a/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetUncleByBlockNumberAndIndexTest.java
+++ b/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetUncleByBlockNumberAndIndexTest.java
@@ -79,7 +79,7 @@ public class EthGetUncleByBlockNumberAndIndexTest {
 
     assertThat(thrown)
         .isInstanceOf(InvalidJsonRpcParameters.class)
-        .hasMessage("Missing required json rpc parameter at index 0");
+        .hasMessage("Invalid block parameter (index 0)");
   }
 
   @Test
diff --git a/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_call_callParamsMissing_block_8.json b/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_call_callParamsMissing_block_8.json
index 562e0f3326..70a9be13f5 100644
--- a/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_call_callParamsMissing_block_8.json
+++ b/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_call_callParamsMissing_block_8.json
@@ -12,7 +12,7 @@
     "id": 4,
     "error":{
       "code":-32602,
-      "message":"Invalid params"
+      "message":"Invalid block, unable to parse RLP"
     }
   },
   "statusCode": 200
diff --git a/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_call_invalidBlockhash.json b/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_call_invalidBlockhash.json
index d6a714eb49..f00531954c 100644
--- a/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_call_invalidBlockhash.json
+++ b/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_call_invalidBlockhash.json
@@ -17,7 +17,7 @@
     "id": 3,
     "error" : {
       "code" : -32602,
-      "message" : "Invalid params"
+      "message" : "Invalid block, unable to parse RLP"
     }
   },
   "statusCode": 200
diff --git a/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getBalance_invalidBlockHash.json b/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getBalance_invalidBlockHash.json
index fa6fab6306..7e56b0a566 100644
--- a/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getBalance_invalidBlockHash.json
+++ b/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getBalance_invalidBlockHash.json
@@ -13,7 +13,7 @@
     "id": 28,
     "error" : {
       "code" : -32602,
-      "message" : "Invalid params"
+      "message" : "Invalid block, unable to parse RLP"
     }
   },
   "statusCode": 200
diff --git a/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getBalance_invalidParams.json b/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getBalance_invalidParams.json
index e84f3045a3..0f07f4a3bb 100644
--- a/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getBalance_invalidParams.json
+++ b/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getBalance_invalidParams.json
@@ -10,7 +10,7 @@
     "id": 32,
     "error" : {
       "code" : -32602,
-      "message" : "Invalid params"
+      "message" : "Invalid block, unable to parse RLP"
     }
   },
   "statusCode": 200
diff --git a/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getBlockReceipts_invalidParams_blockNumber.json b/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getBlockReceipts_invalidParams_blockNumber.json
index 91f6a6af8f..4dca011466 100644
--- a/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getBlockReceipts_invalidParams_blockNumber.json
+++ b/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getBlockReceipts_invalidParams_blockNumber.json
@@ -12,7 +12,7 @@
     "id": 300,
     "error" : {
       "code" : -32602,
-      "message" : "Invalid params"
+      "message" : "Invalid block, unable to parse RLP"
     }
   },
   "statusCode": 200
diff --git a/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getBlockReceipts_invalidParams_tag.json b/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getBlockReceipts_invalidParams_tag.json
index 655ff6013a..8fc9c2d805 100644
--- a/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getBlockReceipts_invalidParams_tag.json
+++ b/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getBlockReceipts_invalidParams_tag.json
@@ -12,7 +12,7 @@
     "id": 301,
     "error" : {
       "code" : -32602,
-      "message" : "Invalid params"
+      "message" : "Invalid block, unable to parse RLP"
     }
   },
   "statusCode": 200
diff --git a/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getBlockTransactionCountByNumber_invalidParams.json b/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getBlockTransactionCountByNumber_invalidParams.json
index 7e40d417e7..1a56a83a60 100644
--- a/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getBlockTransactionCountByNumber_invalidParams.json
+++ b/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getBlockTransactionCountByNumber_invalidParams.json
@@ -10,7 +10,7 @@
     "id": 248,
     "error": {
       "code" : -32602,
-      "message" : "Invalid params"
+      "message" : "Invalid block, unable to parse RLP"
     }
   },
   "statusCode": 200
diff --git a/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getCode_invalidBlockHash.json b/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getCode_invalidBlockHash.json
index a5e1e004af..9e715fca1d 100644
--- a/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getCode_invalidBlockHash.json
+++ b/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getCode_invalidBlockHash.json
@@ -13,7 +13,7 @@
     "id": 0,
     "error" : {
       "code" : -32602,
-      "message" : "Invalid params"
+      "message" : "Invalid block, unable to parse RLP"
     }
   },
   "statusCode": 200
diff --git a/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getCode_invalidParams.json b/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getCode_invalidParams.json
index 5a65b4d17c..929a0f3f35 100644
--- a/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getCode_invalidParams.json
+++ b/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getCode_invalidParams.json
@@ -10,7 +10,7 @@
     "id": 255,
     "error": {
       "code": -32602,
-      "message": "Invalid params"
+      "message": "Invalid block, unable to parse RLP"
     }
   },
   "statusCode": 200
diff --git a/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getProof_invalidBlockHash.json b/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getProof_invalidBlockHash.json
index 257380fdac..4fb69d437c 100644
--- a/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getProof_invalidBlockHash.json
+++ b/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getProof_invalidBlockHash.json
@@ -14,7 +14,7 @@
     "id": 28,
     "error" : {
       "code" : -32602,
-      "message" : "Invalid params"
+      "message" : "Invalid block, unable to parse RLP"
     }
   },
   "statusCode": 200
diff --git a/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getProof_invalidParams.json b/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getProof_invalidParams.json
index ba169f79de..095ebd2a91 100644
--- a/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getProof_invalidParams.json
+++ b/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getProof_invalidParams.json
@@ -10,7 +10,7 @@
     "id": 28,
     "error" : {
       "code" : -32602,
-      "message" : "Invalid params"
+      "message" : "Invalid block, unable to parse RLP"
     }
   },
   "statusCode": 200
diff --git a/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getStorageAt_invalidBlockHash.json b/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getStorageAt_invalidBlockHash.json
index 3ab3afb25e..e8fecda103 100644
--- a/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getStorageAt_invalidBlockHash.json
+++ b/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getStorageAt_invalidBlockHash.json
@@ -14,7 +14,7 @@
     "id": 341,
     "error" : {
       "code" : -32602,
-      "message" : "Invalid params"
+      "message" : "Invalid block, unable to parse RLP"
     }
   },
   "statusCode": 200
diff --git a/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getStorageAt_invalidParams.json b/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getStorageAt_invalidParams.json
index 99af70906a..9ad533c0c6 100644
--- a/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getStorageAt_invalidParams.json
+++ b/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getStorageAt_invalidParams.json
@@ -10,7 +10,7 @@
     "id": 342,
     "error" : {
       "code" : -32602,
-      "message" : "Invalid params"
+      "message" : "Invalid block, unable to parse RLP"
     }
   },
   "statusCode": 200
diff --git a/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getTransactionByBlockNumberAndIndex_invalidParams.json b/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getTransactionByBlockNumberAndIndex_invalidParams.json
index 8ba25d9c33..c88d01904d 100644
--- a/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getTransactionByBlockNumberAndIndex_invalidParams.json
+++ b/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getTransactionByBlockNumberAndIndex_invalidParams.json
@@ -10,7 +10,7 @@
     "id": 486,
     "error": {
       "code" : -32602,
-      "message" : "Invalid params"
+      "message" : "Invalid block, unable to parse RLP"
     }
   },
   "statusCode": 200
diff --git a/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getTransactionCount_invalidBlockHash.json b/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getTransactionCount_invalidBlockHash.json
index 52651090e9..f98c40c0d2 100644
--- a/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getTransactionCount_invalidBlockHash.json
+++ b/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getTransactionCount_invalidBlockHash.json
@@ -13,7 +13,7 @@
     "id": 487,
     "error" : {
       "code" : -32602,
-      "message" : "Invalid params"
+      "message" : "Invalid block, unable to parse RLP"
     }
   },
   "statusCode": 200
diff --git a/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getTransactionCount_invalidBlockNumber.json b/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getTransactionCount_invalidBlockNumber.json
index 0ad4a0d3cb..c25d81a1ab 100644
--- a/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getTransactionCount_invalidBlockNumber.json
+++ b/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getTransactionCount_invalidBlockNumber.json
@@ -13,7 +13,7 @@
     "id": 487,
     "error" : {
       "code" : -32602,
-      "message" : "Invalid params"
+      "message" : "Invalid block, unable to parse RLP"
     }
   },
   "statusCode": 200
diff --git a/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getTransactionCount_missingArgument.json b/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getTransactionCount_missingArgument.json
index 75437d4db8..75ca3aed1a 100644
--- a/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getTransactionCount_missingArgument.json
+++ b/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/eth/eth_getTransactionCount_missingArgument.json
@@ -10,7 +10,7 @@
     "id": 489,
     "error": {
       "code": -32602,
-      "message": "Invalid params"
+      "message": "Invalid block, unable to parse RLP"
     }
   },
   "statusCode": 200
diff --git a/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/trace/specs/replay-trace-transaction/flat/trace_replayBlockTransactions_invalidBlockParam.json b/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/trace/specs/replay-trace-transaction/flat/trace_replayBlockTransactions_invalidBlockParam.json
index b67f6eb872..42967740d9 100644
--- a/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/trace/specs/replay-trace-transaction/flat/trace_replayBlockTransactions_invalidBlockParam.json
+++ b/ethereum/api/src/test/resources/org/hyperledger/besu/ethereum/api/jsonrpc/trace/specs/replay-trace-transaction/flat/trace_replayBlockTransactions_invalidBlockParam.json
@@ -13,7 +13,7 @@
     "id": 415,
     "error": {
       "code": -32602,
-      "message": "Invalid params"
+      "message": "Invalid block, unable to parse RLP"
     }
   },
   "statusCode": 200
diff --git a/ethereum/retesteth/src/main/java/org/hyperledger/besu/ethereum/retesteth/methods/TestImportRawBlock.java b/ethereum/retesteth/src/main/java/org/hyperledger/besu/ethereum/retesteth/methods/TestImportRawBlock.java
index 0652b92cdb..516dc2f55f 100644
--- a/ethereum/retesteth/src/main/java/org/hyperledger/besu/ethereum/retesteth/methods/TestImportRawBlock.java
+++ b/ethereum/retesteth/src/main/java/org/hyperledger/besu/ethereum/retesteth/methods/TestImportRawBlock.java
@@ -16,6 +16,7 @@ package org.hyperledger.besu.ethereum.retesteth.methods;
 
 import org.hyperledger.besu.ethereum.ProtocolContext;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.JsonRpcRequestContext;
+import org.hyperledger.besu.ethereum.api.jsonrpc.internal.exception.InvalidJsonRpcParameters;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.methods.JsonRpcMethod;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.JsonRpcErrorResponse;
 import org.hyperledger.besu.ethereum.api.jsonrpc.internal.response.JsonRpcResponse;
@@ -52,7 +53,13 @@ public class TestImportRawBlock implements JsonRpcMethod {
 
   @Override
   public JsonRpcResponse response(final JsonRpcRequestContext requestContext) {
-    final String input = requestContext.getRequiredParameter(0, String.class);
+    final String input;
+    try {
+      input = requestContext.getRequiredParameter(0, String.class);
+    } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
+      throw new InvalidJsonRpcParameters(
+          "Invalid block parameter (index 0)", RpcErrorType.INVALID_BLOCK_PARAMS, e);
+    }
     final ProtocolContext protocolContext = this.context.getProtocolContext();
 
     final Block block;