> ## Documentation Index
> Fetch the complete documentation index at: https://gofastmcp.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# GitHub OAuth 🤝 FastMCP

> Secure your FastMCP server with GitHub OAuth

New in 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**](https://gofastmcp.com/docs/v2/servers/auth/oauth-proxy.md) 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:

**1. 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.

**2. 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.

> [!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.

**3. 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.

### Step 2: FastMCP Configuration

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

```python server.py theme={"theme":{"light":"snazzy-light","dark":"dark-plus"}}
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 theme={"theme":{"light":"snazzy-light","dark":"dark-plus"}}
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 theme={"theme":{"light":"snazzy-light","dark":"dark-plus"}}
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

> [!NOTE]
>
> 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.

## Production Configuration

New in version `2.13.0`

For production deployments with persistent token management across server restarts, configure `jwt_signing_key` and `client_storage`:

```python server.py theme={"theme":{"light":"snazzy-light","dark":"dark-plus"}}
import os
from fastmcp import FastMCP
from fastmcp.server.auth.providers.github import GitHubProvider
from key_value.aio.stores.redis import RedisStore
from key_value.aio.wrappers.encryption import FernetEncryptionWrapper
from cryptography.fernet import Fernet

# Production setup with encrypted persistent token storage
auth_provider = GitHubProvider(
    client_id="Ov23liAbcDefGhiJkLmN",
    client_secret="github_pat_...",
    base_url="https://your-production-domain.com",

    # Production token management
    jwt_signing_key=os.environ["JWT_SIGNING_KEY"],
    client_storage=FernetEncryptionWrapper(
        key_value=RedisStore(
            host=os.environ["REDIS_HOST"],
            port=int(os.environ["REDIS_PORT"])
        ),
        fernet=Fernet(os.environ["STORAGE_ENCRYPTION_KEY"])
    )
)

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

> [!NOTE]
>
> Parameters (`jwt_signing_key` and `client_storage`) work together to ensure tokens and client registrations survive server restarts. **Wrap your storage in `FernetEncryptionWrapper` to encrypt sensitive OAuth tokens at rest** - without it, tokens are stored in plaintext. Store secrets in environment variables and use a persistent storage backend like Redis for distributed deployments.
>
> For complete details on these parameters, see the [OAuth Proxy documentation](https://gofastmcp.com/docs/v2/servers/auth/oauth-proxy.md#configuration-parameters).

## Environment Variables

New in version `2.12.1`

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

### Provider Selection

Setting this environment variable allows the GitHub provider to be used automatically without explicitly instantiating it in code.

> [card]
>
> **FASTMCP\_SERVER\_AUTH** (default: Not set)
>
> Set to `fastmcp.server.auth.providers.github.GitHubProvider` to use GitHub authentication.

### GitHub-Specific Configuration

These environment variables provide default values for the GitHub provider, whether it's instantiated manually or configured via `FASTMCP_SERVER_AUTH`.

> [card]
>
> **FASTMCP\_SERVER\_AUTH\_GITHUB\_CLIENT\_ID** *required*
>
> Your GitHub OAuth App Client ID (e.g., `Ov23liAbcDefGhiJkLmN`)
>
> **FASTMCP\_SERVER\_AUTH\_GITHUB\_CLIENT\_SECRET** *required*
>
> Your GitHub OAuth App Client Secret
>
> **FASTMCP\_SERVER\_AUTH\_GITHUB\_BASE\_URL** (default: [http://localhost:8000](http://localhost:8000))
>
> Public URL where OAuth endpoints will be accessible (includes any mount path)
>
> **FASTMCP\_SERVER\_AUTH\_GITHUB\_ISSUER\_URL** (default: Uses BASE\_URL)
>
> Issuer URL for OAuth metadata (defaults to `BASE_URL`). Set to root-level URL when mounting under a path prefix to avoid 404 logs. See [HTTP Deployment guide](https://gofastmcp.com/docs/v2/deployment/http.md#mounting-authenticated-servers) for details.
>
> **FASTMCP\_SERVER\_AUTH\_GITHUB\_REDIRECT\_PATH** (default: /auth/callback)
>
> Redirect path configured in your GitHub OAuth App
>
> **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"]`)
>
> **FASTMCP\_SERVER\_AUTH\_GITHUB\_TIMEOUT\_SECONDS** (default: 10)
>
> HTTP request timeout for GitHub API calls

Example `.env` file:

```bash theme={"theme":{"light":"snazzy-light","dark":"dark-plus"}}
# Use the GitHub provider
FASTMCP_SERVER_AUTH=fastmcp.server.auth.providers.github.GitHubProvider

# 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 theme={"theme":{"light":"snazzy-light","dark":"dark-plus"}}
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
```


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