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

---
title: in_memory
sidebarTitle: in_memory
---

# `fastmcp.server.auth.providers.in_memory`

## Classes

### `InMemoryOAuthProvider` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/server/auth/providers/in_memory.py#L31"><Icon icon="github" size="14" /></a></sup>


An in-memory OAuth provider for testing purposes.
It simulates the OAuth 2.1 flow locally without external calls.