## Options

| Property | Description | Required |
| --- | --- | --- |
| **baseApiUrl** | The base API url to use when making requests. You can use the `MAINNET_RELAY_API` or the `TESTNET_RELAY_API` constants exported by the package, or pass in your own proxy API url to protect your API key on the client. | ✅ |
| **apiKey** | A Relay API key to use when making requests. Only pass in this property when the Relay client instance is used exclusively server-side. Otherwise you’ll leak your key to the client. | ❌ |
| **chains** | A list of Relay Chains, by default a list of backup chains is configured | ❌ |
| **source** | The source to associate your onchain activity with, should map to a domain | ❌ |
| **logLevel** | The level at which to log, refer to the `LogLevel` enum exported by the package | ❌ |
| **pollingInterval** | How often to poll status and check apis, this value is in milliseconds | ❌ |
| **maxPollingAttemptsBeforeTimeout** | The source to associate your onchain activity with, should be set to a domain | ❌ |

```
import {
  createClient,
  convertViemChainToRelayChain,
  MAINNET_RELAY_API,
} from "@relayprotocol/relay-sdk";
import { mainnet } from "viem/chains";

createClient({
  baseApiUrl: MAINNET_RELAY_API,
  source: "YOUR.SOURCE",
  chains: [convertViemChainToRelayChain(mainnet)],
});
```