> ## Documentation Index
> Fetch the complete documentation index at: https://colin-feat-client-cache-mode.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# ClientSecretAuthMethod

```ts theme={null}
type ClientSecretAuthMethod = "client_secret_post" | "client_secret_basic";
```

Defined in: [client/auth.ts:501](https://github.com/PrefectHQ/fastmcp-ts/blob/8976c37f79efa6b87809b884f29a1f235a8c4ad1/src/client/auth.ts#L501)

Token-endpoint authentication method for a shared client secret.