Muppet SDK

Fast, lightweight, built on Web Standards. Support for any JavaScript runtime.

import { Muppet } from "muppet";

const mcp = new Muppet({
  name: "my-mcp-server",
  version: "1.0.0",
});

mcp.connect(new StdioServerTransport());

The whole library is under 14kB. Using only Web Standard APIs.

Works on Cloudflare, Fastly, Deno, Bun, AWS, or Node.js. The same code runs on all platforms.

Built-in middlewares, custom middleware, third-party middleware, and helpers. Batteries included.

Supports Standard Schema. Super clean APIs. First-class TypeScript support.

Capabilities

Explore how to implement common functionalities with Muppet:

Learn to expose data and content from your servers to LLMs.

Create reusable prompt templates and workflows.

Enable LLMs to perform actions through your server.

Implement autocompletion features for prompts and resource templates.

We welcome contributions! Please refer to our Contributing Guide to learn how you can help improve Muppet.

We're here to assist and value your feedback:

Bug Reports & Feature Requests: Create a GitHub issue for any issues or suggestions regarding the Muppet SDKs or documentation.
MCP Specification Discussions: Join the specification discussions for general discussions and Q&A about the Model Context Protocol.