diff --git a/apps/indexer/config/dev/parity.exs b/apps/indexer/config/dev/parity.exs
index bdda087359..d6e300f077 100644
--- a/apps/indexer/config/dev/parity.exs
+++ b/apps/indexer/config/dev/parity.exs
@@ -16,6 +16,23 @@ config :indexer,
     ],
     variant: EthereumJSONRPC.Parity
   ],
+  # Example configuration to override json_rpc_named_arguments for just the realtime block fetcher
+  # realtime_overrides: [
+  #   json_rpc_named_arguments: [
+  #     transport: EthereumJSONRPC.HTTP,
+  #     transport_options: [
+  #       http: EthereumJSONRPC.HTTP.HTTPoison,
+  #       url: System.get_env("ETHEREUM_JSONRPC_REALTIME_HTTP_URL") || "http://localhost:8545",
+  #       method_to_url: [
+  #         eth_getBalance: System.get_env("ETHEREUM_JSONRPC_REALTIME_TRACE_URL") || "http://localhost:8545",
+  #         trace_block: System.get_env("ETHEREUM_JSONRPC_REALTIME_TRACE_URL") || "http://localhost:8545",
+  #         trace_replayTransaction: System.get_env("ETHEREUM_JSONRPC_REALTIME_TRACE_URL") || "http://localhost:8545"
+  #       ],
+  #       http_options: [recv_timeout: :timer.minutes(1), timeout: :timer.minutes(1), hackney: [pool: :ethereum_jsonrpc]]
+  #     ],
+  #     variant: EthereumJSONRPC.Parity
+  #   ]
+  # ],
   subscribe_named_arguments: [
     transport: EthereumJSONRPC.WebSocket,
     transport_options: [
diff --git a/apps/indexer/lib/indexer/block/supervisor.ex b/apps/indexer/lib/indexer/block/supervisor.ex
index 6365aba2d7..d77960c503 100644
--- a/apps/indexer/lib/indexer/block/supervisor.ex
+++ b/apps/indexer/lib/indexer/block/supervisor.ex
@@ -18,14 +18,23 @@ defmodule Indexer.Block.Supervisor do
         %{
           block_interval: block_interval,
           json_rpc_named_arguments: json_rpc_named_arguments,
-          subscribe_named_arguments: subscribe_named_arguments
+          subscribe_named_arguments: subscribe_named_arguments,
+          realtime_overrides: realtime_overrides
         } = named_arguments
       ) do
     block_fetcher =
       named_arguments
-      |> Map.drop(~w(block_interval memory_monitor subscribe_named_arguments)a)
+      |> Map.drop(~w(block_interval memory_monitor subscribe_named_arguments realtime_overrides)a)
       |> Block.Fetcher.new()
 
+    realtime_block_fetcher =
+      named_arguments
+      |> Map.drop(~w(block_interval memory_monitor subscribe_named_arguments realtime_overrides)a)
+      |> Map.merge(Enum.into(realtime_overrides, %{}))
+      |> Block.Fetcher.new()
+
+    realtime_subscribe_named_arguments = realtime_overrides[:subscribe_named_arguments] || subscribe_named_arguments
+
     memory_monitor = Map.get(named_arguments, :memory_monitor)
 
     Supervisor.init(
@@ -38,7 +47,7 @@ defmodule Indexer.Block.Supervisor do
         {InvalidConsensus.Supervisor, [[], [name: InvalidConsensus.Supervisor]]},
         {Realtime.Supervisor,
          [
-           %{block_fetcher: block_fetcher, subscribe_named_arguments: subscribe_named_arguments},
+           %{block_fetcher: realtime_block_fetcher, subscribe_named_arguments: realtime_subscribe_named_arguments},
            [name: Realtime.Supervisor]
          ]},
         {Uncle.Supervisor, [[block_fetcher: block_fetcher, memory_monitor: memory_monitor], [name: Uncle.Supervisor]]},
diff --git a/apps/indexer/lib/indexer/shrinkable/supervisor.ex b/apps/indexer/lib/indexer/shrinkable/supervisor.ex
index e4b6693c40..6135b7f9e0 100644
--- a/apps/indexer/lib/indexer/shrinkable/supervisor.ex
+++ b/apps/indexer/lib/indexer/shrinkable/supervisor.ex
@@ -48,10 +48,11 @@ defmodule Indexer.Shrinkable.Supervisor do
       |> Application.get_all_env()
       |> Keyword.take(
         ~w(blocks_batch_size blocks_concurrency block_interval json_rpc_named_arguments receipts_batch_size
-           receipts_concurrency subscribe_named_arguments)a
+           receipts_concurrency subscribe_named_arguments realtime_overrides)a
       )
       |> Enum.into(%{})
       |> Map.put(:memory_monitor, memory_monitor)
+      |> Map.put_new(:realtime_overrides, %{})
 
     Supervisor.init(
       [