docs/python-sdk/fastmcp-server-auth-auth.mdx

---
title: auth
sidebarTitle: auth
---

# `fastmcp.server.auth.auth`

## Classes

### `OAuthProvider` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/server/auth/auth.py#L14" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

**Methods:**

#### `verify_token` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/server/auth/auth.py#L47" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
verify_token(self, token: str) -> AccessToken | None
```

Verify a bearer token and return access info if valid.

This method implements the TokenVerifier protocol by delegating
to our existing load_access_token method.

**Args:**
- `token`: The token string to validate

**Returns:**
- AccessToken object if valid, None if invalid or expired