> ## Documentation Index
> Fetch the complete documentation index at: https://fastmcp-docs-v3-beta2-feature-tracking.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.
# oauth_callback
# `fastmcp.client.oauth_callback`
OAuth callback server for handling authorization code flows.
This module provides a reusable callback server that can handle OAuth redirects
and display styled responses to users.
## Functions
### `create_callback_html`
```python theme={null}
create_callback_html(message: str, is_success: bool = True, title: str = 'FastMCP OAuth', server_url: str | None = None) -> str
```
Create a styled HTML response for OAuth callbacks.
### `create_oauth_callback_server`
```python theme={null}
create_oauth_callback_server(port: int, callback_path: str = '/callback', server_url: str | None = None, result_container: OAuthCallbackResult | None = None, result_ready: anyio.Event | None = None) -> Server
```
Create an OAuth callback server.
**Args:**
* `port`: The port to run the server on
* `callback_path`: The path to listen for OAuth redirects on
* `server_url`: Optional server URL to display in success messages
* `result_container`: Optional container to store callback results
* `result_ready`: Optional event to signal when callback is received
**Returns:**
* Configured uvicorn Server instance (not yet running)
## Classes
### `CallbackResponse`
**Methods:**
#### `from_dict`
```python theme={null}
from_dict(cls, data: dict[str, str]) -> CallbackResponse
```
#### `to_dict`
```python theme={null}
to_dict(self) -> dict[str, str]
```
### `OAuthCallbackResult`
Container for OAuth callback results, used with anyio.Event for async coordination.