---
title: GitHub OAuth 🤝 FastMCP
sidebarTitle: GitHub
description: Secure your FastMCP server with GitHub OAuth
icon: github
tag: NEW
---

import { VersionBadge } from "/snippets/version-badge.mdx"

<VersionBadge version="2.12.0" />

This guide shows you how to secure your FastMCP server using **GitHub OAuth**. Since GitHub doesn't support Dynamic Client Registration, this integration uses the [**OAuth Proxy**](/servers/auth/oauth-proxy) pattern to bridge GitHub's traditional OAuth with MCP's authentication requirements.

## Configuration

### Prerequisites

Before you begin, you will need:
1. A **[GitHub Account](https://github.com/)** with access to create OAuth Apps
2. Your FastMCP server's URL (can be localhost for development, e.g., `http://localhost:8000`)

### Step 1: Create a GitHub OAuth App

Create an OAuth App in your GitHub settings to get the credentials needed for authentication:

<Steps>
<Step title="Navigate to OAuth Apps">
    Go to **Settings → Developer settings → OAuth Apps** in your GitHub account, or visit [github.com/settings/developers](https://github.com/settings/developers).
    
    Click **"New OAuth App"** to create a new application.
</Step>

<Step title="Configure Your OAuth App">
    Fill in the application details:
    
    - **Application name**: Choose a name users will recognize (e.g., "My FastMCP Server")
    - **Homepage URL**: Your application's homepage or documentation URL
    - **Authorization callback URL**: Your server URL + `/auth/callback` (e.g., `http://localhost:8000/auth/callback`)
    
    <Warning>
    The callback URL must match exactly. The default path is `/auth/callback`, but you can customize it using the `redirect_path` parameter. For local development, GitHub allows `http://localhost` URLs. For production, you must use HTTPS.
    </Warning>
    
    <Tip>
    If you want to use a custom callback path (e.g., `/auth/github/callback`), make sure to set the same path in both your GitHub OAuth App settings and the `redirect_path` parameter when configuring the GitHubProvider.
    </Tip>
</Step>

<Step title="Save Your Credentials">
    After creating the app, you'll see:
    
    - **Client ID**: A public identifier like `Ov23liAbcDefGhiJkLmN`
    - **Client Secret**: Click "Generate a new client secret" and save the value securely
    
    <Tip>
    Store these credentials securely. Never commit them to version control. Use environment variables or a secrets manager in production.
    </Tip>
</Step>
</Steps>

### Step 2: FastMCP Configuration

Create your FastMCP server using the `GitHubProvider`, which handles GitHub's OAuth quirks automatically:

```python server.py
from fastmcp import FastMCP
from fastmcp.server.auth.providers.github import GitHubProvider

# The GitHubProvider handles GitHub's token format and validation
auth_provider = GitHubProvider(
    client_id="Ov23liAbcDefGhiJkLmN",  # Your GitHub OAuth App Client ID
    client_secret="github_pat_...",     # Your GitHub OAuth App Client Secret
    base_url="http://localhost:8000",   # Must match your OAuth App configuration
    # redirect_path="/auth/callback"   # Default value, customize if needed
)

mcp = FastMCP(name="GitHub Secured App", auth=auth_provider)

# Add a protected tool to test authentication
@mcp.tool
async def get_user_info() -> dict:
    """Returns information about the authenticated GitHub user."""
    from fastmcp.server.dependencies import get_access_token
    
    token = get_access_token()
    # The GitHubProvider stores user data in token claims
    return {
        "github_user": token.claims.get("login"),
        "name": token.claims.get("name"),
        "email": token.claims.get("email")
    }
```

## Testing

### Running the Server

Start your FastMCP server with HTTP transport to enable OAuth flows:

```bash
fastmcp run server.py --transport http --port 8000
```

Your server is now running and protected by GitHub OAuth authentication.

### Testing with a Client

Create a test client that authenticates with your GitHub-protected server:

```python test_client.py
from fastmcp import Client
import asyncio

async def main():
    # The client will automatically handle GitHub OAuth
    async with Client("http://localhost:8000/mcp/", auth="oauth") as client:
        # First-time connection will open GitHub login in your browser
        print("✓ Authenticated with GitHub!")
        
        # Test the protected tool
        result = await client.call_tool("get_user_info")
        print(f"GitHub user: {result['github_user']}")

if __name__ == "__main__":
    asyncio.run(main())
```

When you run the client for the first time:
1. Your browser will open to GitHub's authorization page
2. After you authorize the app, you'll be redirected back
3. The client receives the token and can make authenticated requests

<Info>
The client caches tokens locally, so you won't need to re-authenticate for subsequent runs unless the token expires or you explicitly clear the cache.
</Info>

## Environment Variables

For production deployments, use environment variables instead of hardcoding credentials. 

<Info>
To use the registered GitHub provider, you must set `FASTMCP_SERVER_AUTH=GITHUB`. Learn more about [registered providers](/servers/auth/authentication#registered-providers).
</Info>

### Provider Selection

<ParamField path="FASTMCP_SERVER_AUTH" default="Not set" required>
Set to `GITHUB` to use the registered GitHubProvider with default configuration.
</ParamField>

### GitHub-Specific Configuration

<Card>
<ParamField path="FASTMCP_SERVER_AUTH_GITHUB_CLIENT_ID" required>
Your GitHub OAuth App Client ID (e.g., `Ov23liAbcDefGhiJkLmN`)
</ParamField>

<ParamField path="FASTMCP_SERVER_AUTH_GITHUB_CLIENT_SECRET" required>
Your GitHub OAuth App Client Secret
</ParamField>

<ParamField path="FASTMCP_SERVER_AUTH_GITHUB_BASE_URL" default="http://localhost:8000">
Public URL of your FastMCP server for OAuth callbacks
</ParamField>

<ParamField path="FASTMCP_SERVER_AUTH_GITHUB_REDIRECT_PATH" default="/auth/callback">
Redirect path configured in your GitHub OAuth App
</ParamField>

<ParamField path="FASTMCP_SERVER_AUTH_GITHUB_REQUIRED_SCOPES" default='["user"]'>
Comma-, space-, or JSON-separated list of required GitHub scopes (e.g., `user repo` or `["user","repo"]`)
</ParamField>

<ParamField path="FASTMCP_SERVER_AUTH_GITHUB_TIMEOUT_SECONDS" default="10">
HTTP request timeout for GitHub API calls
</ParamField>
</Card>

Example `.env` file:
```bash
# Use the registered GitHub provider
FASTMCP_SERVER_AUTH=GITHUB

# GitHub OAuth credentials
FASTMCP_SERVER_AUTH_GITHUB_CLIENT_ID=Ov23liAbcDefGhiJkLmN
FASTMCP_SERVER_AUTH_GITHUB_CLIENT_SECRET=github_pat_...
FASTMCP_SERVER_AUTH_GITHUB_BASE_URL=https://your-server.com
FASTMCP_SERVER_AUTH_GITHUB_REQUIRED_SCOPES=user,repo
```

With environment variables set, your server code simplifies to:

```python server.py
from fastmcp import FastMCP

# Authentication is automatically configured from environment
mcp = FastMCP(name="GitHub Secured App")

@mcp.tool
async def list_repos() -> list[str]:
    """List the authenticated user's repositories."""
    # Your tool implementation here
    pass
```
