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 47fe7738b9d..32ed9c56118 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
@@ -65,7 +65,7 @@ public JsonRpcResponse response(final JsonRpcRequestContext requestContext) {
       addressHash = requestContext.getRequiredParameter(2, String.class);
     } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
       throw new InvalidJsonRpcParameters(
-          "Invalid address hash parameter", RpcErrorType.INVALID_ADDRESS_HASH_PARAMS, e);
+          "Invalid address hash parameter (index 2)", RpcErrorType.INVALID_ADDRESS_HASH_PARAMS, e);
     }
     final int maxResults = requestContext.getRequiredParameter(3, Integer.TYPE);
 
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/permissioning/PermAddAccountsToAllowlist.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/permissioning/PermAddAccountsToAllowlist.java
index 407edcd8fe4..f3407ba10d6 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/permissioning/PermAddAccountsToAllowlist.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/permissioning/PermAddAccountsToAllowlist.java
@@ -50,7 +50,7 @@ public JsonRpcResponse response(final JsonRpcRequestContext requestContext) {
       accountsList = requestContext.getRequiredParameter(0, List.class);
     } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
       throw new InvalidJsonRpcParameters(
-          "Invalid accounts list parameter", RpcErrorType.INVALID_ACCOUNT_PARAMS, e);
+          "Invalid accounts list parameter (index 0)", RpcErrorType.INVALID_ACCOUNT_PARAMS, e);
     }
 
     if (allowlistController.isPresent()) {
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/permissioning/PermRemoveAccountsFromAllowlist.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/permissioning/PermRemoveAccountsFromAllowlist.java
index bd0176dbd3f..a39acd5e9cd 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/permissioning/PermRemoveAccountsFromAllowlist.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/permissioning/PermRemoveAccountsFromAllowlist.java
@@ -50,7 +50,7 @@ public JsonRpcResponse response(final JsonRpcRequestContext requestContext) {
       accountsList = requestContext.getRequiredParameter(0, List.class);
     } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
       throw new InvalidJsonRpcParameters(
-          "Invalid accounts list parameter", RpcErrorType.INVALID_ACCOUNT_PARAMS, e);
+          "Invalid accounts list parameter (index 0)", RpcErrorType.INVALID_ACCOUNT_PARAMS, e);
     }
 
     if (allowlistController.isPresent()) {
diff --git a/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/permissioning/PermAddAccountsToAllowlistTest.java b/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/permissioning/PermAddAccountsToAllowlistTest.java
index 4a3300d16cd..a87a6487fb5 100644
--- a/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/permissioning/PermAddAccountsToAllowlistTest.java
+++ b/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/permissioning/PermAddAccountsToAllowlistTest.java
@@ -125,7 +125,7 @@ public void whenEmptyParamOnRequestShouldThrowInvalidJsonRpcException() {
     final Throwable thrown = catchThrowable(() -> method.response(request));
     assertThat(thrown)
         .isInstanceOf(InvalidJsonRpcParameters.class)
-        .hasMessage("Invalid accounts list parameter");
+        .hasMessage("Invalid accounts list parameter (index 0)");
   }
 
   private JsonRpcRequestContext request(final List<String> accounts) {
diff --git a/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/permissioning/PermRemoveAccountsFromAllowlistTest.java b/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/permissioning/PermRemoveAccountsFromAllowlistTest.java
index 2e8218752e6..af3fc2ee6ad 100644
--- a/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/permissioning/PermRemoveAccountsFromAllowlistTest.java
+++ b/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/permissioning/PermRemoveAccountsFromAllowlistTest.java
@@ -126,7 +126,7 @@ public void whenEmptyParamOnRequestShouldThrowInvalidJsonRpcException() {
     final Throwable thrown = catchThrowable(() -> method.response(request));
     assertThat(thrown)
         .isInstanceOf(InvalidJsonRpcParameters.class)
-        .hasMessage("Invalid accounts list parameter");
+        .hasMessage("Invalid accounts list parameter (index 0)");
   }
 
   private JsonRpcRequestContext request(final List<String> accounts) {