> ## Documentation Index
> Fetch the complete documentation index at: https://docs.dynamic.xyz/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# overrideNetworkRpcUrl

<Card title="Recommended: JavaScript SDK with React Hooks" icon="react" color="#4779FE">
  For new React apps, we recommend the JavaScript SDK with React Hooks (`@dynamic-labs-sdk/react-hooks`) instead of the legacy React SDK documented here. The JS SDK comes with many benefits such as a much smaller bundle size and other optimizations. Use the [React quickstart (JavaScript SDK)](/javascript/reference/react-quickstart) to get started.
</Card>

## Summary

This utility function overrides the rpc urls in the array of `GenericNetwork` with the new rpc url specified per network. If no rpc url is specified for a given network, it will use the default rpc url from the dashboard. This function is imported from `@dynamic-labs/sdk-react-core`.

## Annotation

```TypeScript theme={"system"}
export declare const overrideNetworkRpcUrl: (networks: GenericNetwork[], rpcUrlOverrides: Record<string, string[]>) => GenericNetwork[];
```

## Example

It is commonly used when you set rpc urls for a networks in the dashboard, and you want to override them for a specific network in certain implementations of your environment.

```TypeScript theme={"system"}
import { overrideNetworkRpcUrl } from "@dynamic-labs/sdk-react-core";

const evmRpcUrlOverrides = {
    "1": ["https://eth.customrpc.com"],
    "137": ["https://polygon.customrpc.com"]
}

const solRpcUrlOverrides = {
    "101": ["https://sol.customrpc.com"],
    "201": ["https://eclipse.customrpc.com"]
}

const DynamicSettings = {
  overrides: {
    evmNetworks: (networks) => overrideNetworkRpcUrl(networks, evmRpcUrlOverrides),
    solNetworks: (networks) => overrideNetworkRpcUrl(networks, solRpcUrlOverrides),
  }
};
```