## Testnets Supported

You can see all the testnets we support in the table below. You can also query our API to get a JSON of the supported testnets: [https://api.testnets.relay.link/chains](https://api.testnets.relay.link/chains) The API response will also return chain IDs and other relevant information.

| Chain | Chain ID | Supported Tokens |
| --- | --- | --- |
| Base Sepolia | 84532 | All |
| Sepolia | 11155111 | All |

## API Support

To access testnets with our API, make sure to use the correct base URL: `https://api.testnets.relay.link` By using this base URL, you’ll be able to bridge, swap, and transact on testnets Relay supports. To get started, check out the [API documentation](https://docs.relay.link/references/api/overview).

## SDK Support

To access testnets with our SDK, make sure to use the correct base URL: `https://api.testnets.relay.link` You’ll pass this base URL in the `baseApiUrl` parameter when creating the client. To get started, check out the [SDK documentation](https://docs.relay.link/references/relay-kit/sdk/installation).

## UI Kit Support

To access testnet with our UI kit, make sure to pass the testnet chain you want e.g. `base sepolia`, `sepolia`, etc. To get started, check out the [UI Kit documentation](https://docs.relay.link/references/relay-kit/overview).