diff --git a/apps/block_scout_web/lib/block_scout_web/controllers/api/v2/address_controller.ex b/apps/block_scout_web/lib/block_scout_web/controllers/api/v2/address_controller.ex
index 0e677fa567..806fcd0f37 100644
--- a/apps/block_scout_web/lib/block_scout_web/controllers/api/v2/address_controller.ex
+++ b/apps/block_scout_web/lib/block_scout_web/controllers/api/v2/address_controller.ex
@@ -12,6 +12,7 @@ defmodule BlockScoutWeb.API.V2.AddressController do
   import BlockScoutWeb.PagingHelper,
     only: [delete_parameters_from_next_page_params: 1, token_transfers_types_options: 1]
 
+  alias BlockScoutWeb.AccessHelpers
   alias BlockScoutWeb.API.V2.{AddressView, BlockView, TransactionView}
   alias Explorer.{Chain, Market}
   alias Indexer.Fetcher.TokenBalanceOnDemand
@@ -38,8 +39,9 @@ defmodule BlockScoutWeb.API.V2.AddressController do
 
   action_fallback(BlockScoutWeb.API.V2.FallbackController)
 
-  def address(conn, %{"address_hash" => address_hash_string}) do
+  def address(conn, %{"address_hash" => address_hash_string} = params) do
     with {:format, {:ok, address_hash}} <- {:format, Chain.string_to_address_hash(address_hash_string)},
+         {:ok, false} <- AccessHelpers.restricted_access?(address_hash_string, params),
          {:not_found, {:ok, address}} <- {:not_found, Chain.hash_to_address(address_hash)} do
       conn
       |> put_status(200)
@@ -47,8 +49,9 @@ defmodule BlockScoutWeb.API.V2.AddressController do
     end
   end
 
-  def counters(conn, %{"address_hash" => address_hash_string}) do
+  def counters(conn, %{"address_hash" => address_hash_string} = params) do
     with {:format, {:ok, address_hash}} <- {:format, Chain.string_to_address_hash(address_hash_string)},
+         {:ok, false} <- AccessHelpers.restricted_access?(address_hash_string, params),
          {:not_found, {:ok, address}} <- {:not_found, Chain.hash_to_address(address_hash)} do
       {validation_count} = Chain.address_counters(address)
 
@@ -65,8 +68,9 @@ defmodule BlockScoutWeb.API.V2.AddressController do
     end
   end
 
-  def token_balances(conn, %{"address_hash" => address_hash_string}) do
-    with {:format, {:ok, address_hash}} <- {:format, Chain.string_to_address_hash(address_hash_string)} do
+  def token_balances(conn, %{"address_hash" => address_hash_string} = params) do
+    with {:format, {:ok, address_hash}} <- {:format, Chain.string_to_address_hash(address_hash_string)},
+         {:ok, false} <- AccessHelpers.restricted_access?(address_hash_string, params) do
       token_balances =
         address_hash
         |> Chain.fetch_last_token_balances()
@@ -86,7 +90,8 @@ defmodule BlockScoutWeb.API.V2.AddressController do
   end
 
   def transactions(conn, %{"address_hash" => address_hash_string} = params) do
-    with {:format, {:ok, address_hash}} <- {:format, Chain.string_to_address_hash(address_hash_string)} do
+    with {:format, {:ok, address_hash}} <- {:format, Chain.string_to_address_hash(address_hash_string)},
+         {:ok, false} <- AccessHelpers.restricted_access?(address_hash_string, params) do
       options =
         @transaction_necessity_by_association
         |> Keyword.merge(paging_options(params))
@@ -106,7 +111,8 @@ defmodule BlockScoutWeb.API.V2.AddressController do
   end
 
   def token_transfers(conn, %{"address_hash" => address_hash_string} = params) do
-    with {:format, {:ok, address_hash}} <- {:format, Chain.string_to_address_hash(address_hash_string)} do
+    with {:format, {:ok, address_hash}} <- {:format, Chain.string_to_address_hash(address_hash_string)},
+         {:ok, false} <- AccessHelpers.restricted_access?(address_hash_string, params) do
       options =
         @token_transfer_necessity_by_association
         |> Keyword.merge(paging_options(params))
@@ -132,7 +138,8 @@ defmodule BlockScoutWeb.API.V2.AddressController do
   end
 
   def internal_transactions(conn, %{"address_hash" => address_hash_string} = params) do
-    with {:format, {:ok, address_hash}} <- {:format, Chain.string_to_address_hash(address_hash_string)} do
+    with {:format, {:ok, address_hash}} <- {:format, Chain.string_to_address_hash(address_hash_string)},
+         {:ok, false} <- AccessHelpers.restricted_access?(address_hash_string, params) do
       full_options =
         [
           necessity_by_association: %{
@@ -164,7 +171,8 @@ defmodule BlockScoutWeb.API.V2.AddressController do
   end
 
   def logs(conn, %{"address_hash" => address_hash_string, "topic" => topic} = params) do
-    with {:format, {:ok, address_hash}} <- {:format, Chain.string_to_address_hash(address_hash_string)} do
+    with {:format, {:ok, address_hash}} <- {:format, Chain.string_to_address_hash(address_hash_string)},
+         {:ok, false} <- AccessHelpers.restricted_access?(address_hash_string, params) do
       prepared_topic = String.trim(topic)
 
       formatted_topic = if String.starts_with?(prepared_topic, "0x"), do: prepared_topic, else: "0x" <> prepared_topic
@@ -183,7 +191,8 @@ defmodule BlockScoutWeb.API.V2.AddressController do
   end
 
   def logs(conn, %{"address_hash" => address_hash_string} = params) do
-    with {:format, {:ok, address_hash}} <- {:format, Chain.string_to_address_hash(address_hash_string)} do
+    with {:format, {:ok, address_hash}} <- {:format, Chain.string_to_address_hash(address_hash_string)},
+         {:ok, false} <- AccessHelpers.restricted_access?(address_hash_string, params) do
       results_plus_one = Chain.address_to_logs(address_hash, paging_options(params))
       {logs, next_page} = split_list_by_page(results_plus_one)
 
@@ -197,7 +206,8 @@ defmodule BlockScoutWeb.API.V2.AddressController do
   end
 
   def blocks_validated(conn, %{"address_hash" => address_hash_string} = params) do
-    with {:format, {:ok, address_hash}} <- {:format, Chain.string_to_address_hash(address_hash_string)} do
+    with {:format, {:ok, address_hash}} <- {:format, Chain.string_to_address_hash(address_hash_string)},
+         {:ok, false} <- AccessHelpers.restricted_access?(address_hash_string, params) do
       full_options =
         Keyword.merge(
           [
@@ -225,6 +235,7 @@ defmodule BlockScoutWeb.API.V2.AddressController do
 
   def coin_balance_history(conn, %{"address_hash" => address_hash_string} = params) do
     with {:format, {:ok, address_hash}} <- {:format, Chain.string_to_address_hash(address_hash_string)},
+         {:ok, false} <- AccessHelpers.restricted_access?(address_hash_string, params),
          {:not_found, {:ok, _address}, _} <-
            {:not_found, Chain.hash_to_address(address_hash), :empty_items_with_next_page_params} do
       full_options = paging_options(params)
@@ -243,8 +254,9 @@ defmodule BlockScoutWeb.API.V2.AddressController do
     end
   end
 
-  def coin_balance_history_by_day(conn, %{"address_hash" => address_hash_string}) do
-    with {:format, {:ok, address_hash}} <- {:format, Chain.string_to_address_hash(address_hash_string)} do
+  def coin_balance_history_by_day(conn, %{"address_hash" => address_hash_string} = params) do
+    with {:format, {:ok, address_hash}} <- {:format, Chain.string_to_address_hash(address_hash_string)},
+         {:ok, false} <- AccessHelpers.restricted_access?(address_hash_string, params) do
       balances_by_day =
         address_hash
         |> Chain.address_to_balances_by_day(true)
diff --git a/apps/block_scout_web/lib/block_scout_web/controllers/api/v2/fallback_controller.ex b/apps/block_scout_web/lib/block_scout_web/controllers/api/v2/fallback_controller.ex
index b61ef38777..d808d6aa0e 100644
--- a/apps/block_scout_web/lib/block_scout_web/controllers/api/v2/fallback_controller.ex
+++ b/apps/block_scout_web/lib/block_scout_web/controllers/api/v2/fallback_controller.ex
@@ -40,4 +40,11 @@ defmodule BlockScoutWeb.API.V2.FallbackController do
     conn
     |> call({:not_found, nil})
   end
+
+  def call(conn, {:restricted_access, true}) do
+    conn
+    |> put_status(:forbidden)
+    |> put_view(ApiView)
+    |> render(:message, %{message: "Restricted access"})
+  end
 end
diff --git a/apps/block_scout_web/lib/block_scout_web/controllers/api/v2/token_controller.ex b/apps/block_scout_web/lib/block_scout_web/controllers/api/v2/token_controller.ex
index 79998a4aaa..b13b265a7e 100644
--- a/apps/block_scout_web/lib/block_scout_web/controllers/api/v2/token_controller.ex
+++ b/apps/block_scout_web/lib/block_scout_web/controllers/api/v2/token_controller.ex
@@ -1,6 +1,7 @@
 defmodule BlockScoutWeb.API.V2.TokenController do
   use BlockScoutWeb, :controller
 
+  alias BlockScoutWeb.AccessHelpers
   alias BlockScoutWeb.API.V2.TransactionView
   alias Explorer.Chain
 
@@ -9,8 +10,9 @@ defmodule BlockScoutWeb.API.V2.TokenController do
 
   action_fallback(BlockScoutWeb.API.V2.FallbackController)
 
-  def token(conn, %{"address_hash" => address_hash_string}) do
+  def token(conn, %{"address_hash" => address_hash_string} = params) do
     with {:format, {:ok, address_hash}} <- {:format, Chain.string_to_address_hash(address_hash_string)},
+         {:ok, false} <- AccessHelpers.restricted_access?(address_hash_string, params),
          {:not_found, {:ok, token}} <- {:not_found, Chain.token_from_address_hash(address_hash)} do
       conn
       |> put_status(200)
@@ -18,8 +20,9 @@ defmodule BlockScoutWeb.API.V2.TokenController do
     end
   end
 
-  def counters(conn, %{"address_hash" => address_hash_string}) do
+  def counters(conn, %{"address_hash" => address_hash_string} = params) do
     with {:format, {:ok, address_hash}} <- {:format, Chain.string_to_address_hash(address_hash_string)},
+         {:ok, false} <- AccessHelpers.restricted_access?(address_hash_string, params),
          {:not_found, {:ok, _}} <- {:not_found, Chain.token_from_address_hash(address_hash)} do
       {transfer_count, token_holder_count} = Chain.fetch_token_counters(address_hash, 30_000)
 
@@ -28,7 +31,8 @@ defmodule BlockScoutWeb.API.V2.TokenController do
   end
 
   def transfers(conn, %{"address_hash" => address_hash_string} = params) do
-    with {:format, {:ok, address_hash}} <- {:format, Chain.string_to_address_hash(address_hash_string)} do
+    with {:format, {:ok, address_hash}} <- {:format, Chain.string_to_address_hash(address_hash_string)},
+         {:ok, false} <- AccessHelpers.restricted_access?(address_hash_string, params) do
       results_plus_one = Chain.fetch_token_transfers_from_token_hash(address_hash, paging_options(params))
 
       {token_transfers, next_page} = split_list_by_page(results_plus_one)
@@ -47,6 +51,7 @@ defmodule BlockScoutWeb.API.V2.TokenController do
     from_api = true
 
     with {:format, {:ok, address_hash}} <- {:format, Chain.string_to_address_hash(address_hash_string)},
+         {:ok, false} <- AccessHelpers.restricted_access?(address_hash_string, params),
          {:not_found, {:ok, token}, _} <-
            {:not_found, Chain.token_from_address_hash(address_hash), :empty_items_with_next_page_params} do
       results_plus_one = Chain.fetch_token_holders_from_token_hash(address_hash, from_api, paging_options(params))
diff --git a/apps/block_scout_web/lib/block_scout_web/controllers/api/v2/transaction_controller.ex b/apps/block_scout_web/lib/block_scout_web/controllers/api/v2/transaction_controller.ex
index 4b6a6c9599..b66c5726cf 100644
--- a/apps/block_scout_web/lib/block_scout_web/controllers/api/v2/transaction_controller.ex
+++ b/apps/block_scout_web/lib/block_scout_web/controllers/api/v2/transaction_controller.ex
@@ -13,6 +13,7 @@ defmodule BlockScoutWeb.API.V2.TransactionController do
       type_filter_options: 1
     ]
 
+  alias BlockScoutWeb.AccessHelpers
   alias Explorer.Chain
   alias Explorer.Chain.Import
   alias Explorer.Chain.Import.Runner.InternalTransactions
@@ -59,7 +60,7 @@ defmodule BlockScoutWeb.API.V2.TransactionController do
     }
   ]
 
-  def transaction(conn, %{"transaction_hash" => transaction_hash_string}) do
+  def transaction(conn, %{"transaction_hash" => transaction_hash_string} = params) do
     with {:format, {:ok, transaction_hash}} <- {:format, Chain.string_to_transaction_hash(transaction_hash_string)},
          {:not_found, {:ok, transaction}} <-
            {:not_found,
@@ -67,6 +68,8 @@ defmodule BlockScoutWeb.API.V2.TransactionController do
               transaction_hash,
               necessity_by_association: @transaction_necessity_by_association
             )},
+         {:ok, false} <- AccessHelpers.restricted_access?(to_string(transaction.from_address_hash), params),
+         {:ok, false} <- AccessHelpers.restricted_access?(to_string(transaction.to_address_hash), params),
          preloaded <-
            Chain.preload_token_transfers(transaction, @token_transfers_in_tx_neccessity_by_association, false) do
       conn
@@ -97,10 +100,12 @@ defmodule BlockScoutWeb.API.V2.TransactionController do
     |> render(:transactions, %{transactions: transactions, next_page_params: next_page_params})
   end
 
-  def raw_trace(conn, %{"transaction_hash" => transaction_hash_string}) do
+  def raw_trace(conn, %{"transaction_hash" => transaction_hash_string} = params) do
     with {:format, {:ok, transaction_hash}} <- {:format, Chain.string_to_transaction_hash(transaction_hash_string)},
          {:not_found, {:ok, transaction}} <-
-           {:not_found, Chain.hash_to_transaction(transaction_hash)} do
+           {:not_found, Chain.hash_to_transaction(transaction_hash)},
+         {:ok, false} <- AccessHelpers.restricted_access?(to_string(transaction.from_address_hash), params),
+         {:ok, false} <- AccessHelpers.restricted_access?(to_string(transaction.to_address_hash), params) do
       if is_nil(transaction.block_number) do
         conn
         |> put_status(200)
@@ -158,7 +163,11 @@ defmodule BlockScoutWeb.API.V2.TransactionController do
   end
 
   def token_transfers(conn, %{"transaction_hash" => transaction_hash_string} = params) do
-    with {:format, {:ok, transaction_hash}} <- {:format, Chain.string_to_transaction_hash(transaction_hash_string)} do
+    with {:format, {:ok, transaction_hash}} <- {:format, Chain.string_to_transaction_hash(transaction_hash_string)},
+         {:not_found, {:ok, transaction}} <-
+           {:not_found, Chain.hash_to_transaction(transaction_hash)},
+         {:ok, false} <- AccessHelpers.restricted_access?(to_string(transaction.from_address_hash), params),
+         {:ok, false} <- AccessHelpers.restricted_access?(to_string(transaction.to_address_hash), params) do
       full_options =
         [necessity_by_association: @token_transfers_neccessity_by_association]
         |> Keyword.merge(paging_options(params))
@@ -180,7 +189,11 @@ defmodule BlockScoutWeb.API.V2.TransactionController do
   end
 
   def internal_transactions(conn, %{"transaction_hash" => transaction_hash_string} = params) do
-    with {:format, {:ok, transaction_hash}} <- {:format, Chain.string_to_transaction_hash(transaction_hash_string)} do
+    with {:format, {:ok, transaction_hash}} <- {:format, Chain.string_to_transaction_hash(transaction_hash_string)},
+         {:not_found, {:ok, transaction}} <-
+           {:not_found, Chain.hash_to_transaction(transaction_hash)},
+         {:ok, false} <- AccessHelpers.restricted_access?(to_string(transaction.from_address_hash), params),
+         {:ok, false} <- AccessHelpers.restricted_access?(to_string(transaction.to_address_hash), params) do
       full_options =
         Keyword.merge(
           @internal_transaction_neccessity_by_association,
@@ -206,7 +219,11 @@ defmodule BlockScoutWeb.API.V2.TransactionController do
   end
 
   def logs(conn, %{"transaction_hash" => transaction_hash_string} = params) do
-    with {:format, {:ok, transaction_hash}} <- {:format, Chain.string_to_transaction_hash(transaction_hash_string)} do
+    with {:format, {:ok, transaction_hash}} <- {:format, Chain.string_to_transaction_hash(transaction_hash_string)},
+         {:not_found, {:ok, transaction}} <-
+           {:not_found, Chain.hash_to_transaction(transaction_hash)},
+         {:ok, false} <- AccessHelpers.restricted_access?(to_string(transaction.from_address_hash), params),
+         {:ok, false} <- AccessHelpers.restricted_access?(to_string(transaction.to_address_hash), params) do
       full_options =
         Keyword.merge(
           [
diff --git a/apps/block_scout_web/test/block_scout_web/controllers/api/v2/transaction_controller_test.exs b/apps/block_scout_web/test/block_scout_web/controllers/api/v2/transaction_controller_test.exs
index 036b79dfc9..b7693129ff 100644
--- a/apps/block_scout_web/test/block_scout_web/controllers/api/v2/transaction_controller_test.exs
+++ b/apps/block_scout_web/test/block_scout_web/controllers/api/v2/transaction_controller_test.exs
@@ -117,13 +117,11 @@ defmodule BlockScoutWeb.API.V2.TransactionControllerTest do
   end
 
   describe "/transactions/{tx_hash}/internal-transactions" do
-    test "return empty list on non existing tx", %{conn: conn} do
+    test "return 404 on non existing tx", %{conn: conn} do
       tx = build(:transaction)
       request = get(conn, "/api/v2/transactions/#{to_string(tx.hash)}/internal-transactions")
 
-      assert response = json_response(request, 200)
-      assert response["items"] == []
-      assert response["next_page_params"] == nil
+      assert %{"message" => "Not found"} = json_response(request, 404)
     end
 
     test "return 422 on invalid tx hash", %{conn: conn} do
@@ -236,13 +234,11 @@ defmodule BlockScoutWeb.API.V2.TransactionControllerTest do
   end
 
   describe "/transactions/{tx_hash}/logs" do
-    test "return empty list on non existing tx", %{conn: conn} do
+    test "return 404 on non existing tx", %{conn: conn} do
       tx = build(:transaction)
       request = get(conn, "/api/v2/transactions/#{to_string(tx.hash)}/logs")
 
-      assert response = json_response(request, 200)
-      assert response["items"] == []
-      assert response["next_page_params"] == nil
+      assert %{"message" => "Not found"} = json_response(request, 404)
     end
 
     test "return 422 on invalid tx hash", %{conn: conn} do
@@ -330,13 +326,11 @@ defmodule BlockScoutWeb.API.V2.TransactionControllerTest do
   end
 
   describe "/transactions/{tx_hash}/token-transfers" do
-    test "return empty list on non existing tx", %{conn: conn} do
+    test "return 404 on non existing tx", %{conn: conn} do
       tx = build(:transaction)
       request = get(conn, "/api/v2/transactions/#{to_string(tx.hash)}/token-transfers")
 
-      assert response = json_response(request, 200)
-      assert response["items"] == []
-      assert response["next_page_params"] == nil
+      assert %{"message" => "Not found"} = json_response(request, 404)
     end
 
     test "return 422 on invalid tx hash", %{conn: conn} do