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

# AuthorizationError

Defined in: [server/auth/types.ts:22](https://github.com/PrefectHQ/fastmcp-ts/blob/e4b6038f642b529f601463a576229747afebe9a4/src/server/auth/types.ts#L22)

Thrown by authorization checks to produce a 403 response.
Any other error thrown during verification produces a 401.

## Extends

* `Error`

## Constructors

### Constructor

```ts theme={null}
new AuthorizationError(message): AuthorizationError;
```

Defined in: [server/auth/types.ts:23](https://github.com/PrefectHQ/fastmcp-ts/blob/e4b6038f642b529f601463a576229747afebe9a4/src/server/auth/types.ts#L23)

#### Parameters

##### message

`string`

#### Returns

`AuthorizationError`

#### Overrides

```ts theme={null}
Error.constructor
```