MCP Auth Node.js SDK

What is MCP Auth Node.js SDK?

MCP Auth Node.js SDK is a library that implements OAuth 2.1 and other required RFCs for the Model Context Protocol (MCP) specification. It lets developers connect MCP servers to a trusted OAuth provider with minimal code.

How to use MCP Auth Node.js SDK?

Install the package via npm install mcp-auth (or pnpm/yarn). Then follow the full guide in the documentation. Check the MCP-compatible providers to see which providers are supported.

Key features of MCP Auth Node.js SDK

• Implements OAuth 2.1 and related RFCs for MCP
• Connects to supported trusted providers in a few lines of code
• Includes a tool for real-time provider compatibility checking
• Published on npm with zero-dependency bundle option
• Open source under a permissive license

Use cases of MCP Auth Node.js SDK

• Add OAuth 2.1 authentication to an MCP server
• Quickly prototype MCP server authorization without writing auth from scratch
• Integrate MCP servers with existing OAuth providers
• Validate provider compatibility against MCP requirements

FAQ from MCP Auth Node.js SDK

What does MCP Auth do vs implementing OAuth from scratch?

Instead of spending weeks implementing the MCP spec’s OAuth 2.1 requirements, MCP Auth lets you use a few lines of code to connect to a supported provider.

What dependencies or runtime does it require?

The SDK is installed via npm and runs on Node.js. You can use any package manager like npm, pnpm, or yarn.

Where does authentication data live?

— (not mentioned in README)

Are there known limitations or unsupported flows?

— (not mentioned in README)