secure-mcp-gateway

Webrix MCP-S Gateway

A secure, open-source OAuth gateway for MCP authentication

Gateway + integration layer for the Model Context Protocol (MCP)

MCP-S Gateway

mcp-gateway is a secure gateway and integration layer for the Model Context Protocol (MCP). It provides a unified, enterprise-ready interface for connecting, managing, and extending MCP modules and services, with a focus on security and seamless integration.

Quick Start

1. Configure your MCP servers - Create `mcp.json` file in your project:

{
  "mcpServers": {
    "your-server": {
      "command": "npx",
      "args": ["-y", "@your-mcp-server"],
      "env": {
        "API_KEY": "your-api-key"
      }
    },
    "octocode": {
      "command": "npx",
      "args": ["octocode-mcp"]
    }
  }
}

2. Use the `.env.example` file as a base, and override as needed:

3. Start with npx (Recommended):

# Default (uses ./mcp.json and ./.env)
npx @mcp-s/secure-mcp-gateway

# Custom configuration paths
npx @mcp-s/secure-mcp-gateway --mcp-config ./custom/mcp.json --envfile ./custom/.env

Or clone:

git clone https://github.com/mcp-s-ai/secure-mcp-gateway.git && cd secure-mcp-gateway
npm install && npm run start

4. Add to your MCP configuration:

stdio:

{
  "mcpServers": {
    "mcp-gateway": {
      "command": "npx",
      "args": ["-y", "@mcp-s/mcp"],
      "env": {
        "BASE_URL": "http://localhost:3000"
      }
    }
  }
}

Streamable HTTP Configuration:

{
  "mcpServers": {
    "mcp-gateway": {
      "url": "http://localhost:3000/mcp"
    }
  }
}

Features

• Self-Hosted Gateway: Deploy within your own infrastructure for maximum control
• OAuth Authentication: Secure authentication with any OAuth provider via Auth.js
• TypeScript Support: Fully typed for robust development

TODO: ADD OUR VIDEO -->

Supports all MCP Connection Types:

• STDIO: Standard input/output MCP servers
• StreamableHTTP: HTTP-based streaming connections via `http://localhost:3000/mcp` (or `https:///mcp` for hosted deployments)

> Server Selection: You can connect to a specific MCP server by adding the `?server_name=XXX` query parameter, where `XXX` is the name of the server from your `mcp.json` configuration. For example: `http://localhost:3000/mcp?server_name=your-server`

Connect with your preferred AI client:

Deploy

Deploy the mcp-s gateway using npx:

1. Set up your environment variables (see Advanced Configuration)

2. Create your `mcp.json` configuration file

3. Run `npx @mcp-s/secure-mcp-gateway`

For production deployments, consider using:

• Process managers like PM2: `pm2 start "npx @mcp-s/secure-mcp-gateway" --name mcp-gateway`
• Container orchestration (Docker, Kubernetes)
• Cloud platforms (Heroku, Railway, Render)

Authentication Setup

mcp-gateway leverages the power of Auth.js, which supports 80+ OAuth providers out of the box. This makes Auth.js the perfect companion for an open-source project like mcp-gateway. Both libraries share the same commitment to flexibility, security, and developer experience. By integrating with Auth.js, we avoid reinventing authentication wheels and instead provide you with battle-tested, production-ready OAuth flows that work seamlessly across providers.

Simply set the `AUTH_PROVIDER` environment variable and provide the required credentials for your chosen provider - mcp-gateway handles the rest.

Google OAuth Setup

Documentation: Auth.js Google Provider

AUTH_SECRET=your-random-secret
AUTH_PROVIDER=google
AUTH_GOOGLE_ID=your-google-client-id
AUTH_GOOGLE_SECRET=your-google-client-secret

Okta OAuth Setup

Documentation: Auth.js Okta Provider

AUTH_SECRET=your-random-secret
AUTH_PROVIDER=okta
AUTH_OKTA_ID=your-okta-client-id
AUTH_OKTA_SECRET=your-okta-client-secret
AUTH_OKTA_ISSUER=https://your-okta-domain.okta.com/oauth2/default

Azure AD OAuth Setup

Documentation: Auth.js Azure AD Provider

AUTH_SECRET=your-random-secret
AUTH_PROVIDER=azure-ad
AUTH_AZURE_AD_ID=your-azure-client-id
AUTH_AZURE_AD_SECRET=your-azure-client-secret
AUTH_AZURE_AD_TENANT_ID=your-tenant-id-or-common

GitHub OAuth Setup

Documentation: Auth.js GitHub Provider

GitHub OAuth is particularly useful for MCP servers that interact with GitHub repositories, such as Octocode. When using GitHub OAuth, you can specify scopes to control what permissions your MCP servers have access to.

AUTH_SECRET=your-random-secret
AUTH_PROVIDER=github
AUTH_GITHUB_ID=your-github-client-id
AUTH_GITHUB_SECRET=your-github-client-secret
AUTH_GITHUB_SCOPES=repo

Common GitHub Scopes:

• `repo` - Full access to repositories (public and private)
• `public_repo` - Access to public repositories only
• `read:user` - Read access to user profile information
• `user:email` - Access to user email addresses

For Octocode and similar MCP servers that need repository access, the `repo` scope is typically required.

> For other providers, see the Auth.js Providers documentation.

Advanced Configuration

Command Line Options

Environment Variables

Troubleshooting

StreamableHTTP with Cursor: Tools not appearing after login

Issue: When using StreamableHTTP configuration in Cursor, tools don't appear even after successful authentication.

Solution: Make sure you have only one Cursor window open. Multiple Cursor windows can interfere with the MCP connection establishment.

1. Close all Cursor windows

2. Open a single Cursor window

3. Retry the authentication process

Node.js SQLite module error

Issue: You see the following error:

Error [ERR_UNKNOWN_BUILTIN_MODULE]: No such built-in module: node:sqlite

Solution: This error occurs when using an older version of Node.js. The `node:sqlite` module requires Node.js version 22 or higher.

Fix:

1. Update Node.js to version 22 or later

2. Verify your version: `node --version`

3. Restart the gateway: `npm run start`

Installation options:

• Using nvm: `nvm install 22 && nvm use 22`
• Download from nodejs.org

Hosted Solution

Visit **webrix.ai** for our fully managed hosting solution with advanced features:

• Zero Configuration: Get started in seconds without any setup
• Enterprise-grade Security: Advanced SSO authentication for all MCP interactions
• 20+ Pre-built Connectors: Fast plug-and-play integration with hundreds of tools
• Roles & Permissions: Granular access control with custom role definitions
• Monitoring & Analytics: Real-time insights into your MCP usage
• High Availability: 99.9% uptime SLA with global CDN
• Premium Support: Direct access to our engineering team
• Custom Integrations: Build and deploy custom MCP connectors

Community

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License

Released under the MIT License. Contributions welcome - star & fork!