> ## 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.

# introspectionVerifier

```ts theme={null}
function introspectionVerifier(options): TokenVerifier;
```

Defined in: [server/auth/verifiers/introspection.ts:15](https://github.com/PrefectHQ/fastmcp-ts/blob/8976c37f79efa6b87809b884f29a1f235a8c4ad1/src/server/auth/verifiers/introspection.ts#L15)

## Parameters

### options

`IntrospectionVerifierOptions`

## Returns

[`TokenVerifier`](/api/server/interfaces/TokenVerifier)