> ## 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.

# handleOAuthCallback

```ts theme={null}
function handleOAuthCallback(opts?): void;
```

Defined in: [client/browser-oauth.ts:129](https://github.com/PrefectHQ/fastmcp-ts/blob/8976c37f79efa6b87809b884f29a1f235a8c4ad1/src/client/browser-oauth.ts#L129)

Call from the redirect\_uri page (popup mode) to deliver the authorization
code back to the opener window and close the popup.

## Parameters

### opts?

#### targetOrigin?

`string`

## Returns

`void`