diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8a5d495bab..7f58ff534b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -61,6 +61,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * (rpc) [#474](https://github.com/crypto-org-chain/ethermint/pull/474), [#476](https://github.com/crypto-org-chain/ethermint/pull/441) Align genesis related cmd.
 * (rpc) [#480](https://github.com/crypto-org-chain/ethermint/pull/480), [#482](https://github.com/crypto-org-chain/ethermint/pull/482) Fix parsed logs from old events.
 * (rpc) [#488](https://github.com/crypto-org-chain/ethermint/pull/488) Fix handling of pending transactions related APIs.
+* (rpc) [#501](https://github.com/crypto-org-chain/ethermint/pull/501) Avoid invalid chain id for signer error when rpc call before chain id set in BeginBlock.
 
 ### Improvements
 
diff --git a/app/app.go b/app/app.go
index 40d991e8a3..aacc1cb2d8 100644
--- a/app/app.go
+++ b/app/app.go
@@ -1026,6 +1026,7 @@ func (app *EthermintApp) SimulationManager() *module.SimulationManager {
 // API server.
 func (app *EthermintApp) RegisterAPIRoutes(apiSvr *api.Server, apiConfig config.APIConfig) {
 	clientCtx := apiSvr.ClientCtx
+	app.EvmKeeper.WithChainIDString(clientCtx.ChainID)
 	// Register new tx routes from grpc-gateway.
 	authtx.RegisterGRPCGatewayRoutes(clientCtx, apiSvr.GRPCGatewayRouter)
 	// Register new tendermint queries routes from grpc-gateway.
diff --git a/x/evm/keeper/keeper.go b/x/evm/keeper/keeper.go
index 56acb834f5..99d12e085e 100644
--- a/x/evm/keeper/keeper.go
+++ b/x/evm/keeper/keeper.go
@@ -120,9 +120,14 @@ func (k Keeper) Logger(ctx sdk.Context) log.Logger {
 	return sdkCtx.Logger().With("module", "x/"+types.ModuleName)
 }
 
-// WithChainID sets the chain id to the local variable in the keeper
+// WithChainID sets the chain ID for the keeper by extracting it from the provided context
 func (k *Keeper) WithChainID(ctx sdk.Context) {
-	chainID, err := ethermint.ParseChainID(ctx.ChainID())
+	k.WithChainIDString(ctx.ChainID())
+}
+
+// WithChainIDString sets the chain ID for the keeper after parsing the provided string value
+func (k *Keeper) WithChainIDString(value string) {
+	chainID, err := ethermint.ParseChainID(value)
 	if err != nil {
 		panic(err)
 	}