kit

Name: kit
Availability: InStock
Author: muppet

Muppet Kit is a collection of tools designed for testing and debugging MCP servers. It enables developers to explore the capabilities of MCP servers, utilize AI for assistance, and test various LLMs (Large Language Models) and configurations. The tool also offers security scanning and tracing functionalities for requests and responses, allowing developers to analyze server operations in detail. This enhances the efficiency and safety of developing and operating MCP servers.

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README

Muppet Kit

It is a collection of tools for testing and debugging MCPs.

Inspector

It is a devtool for testing and debugging MCPs servers.

Usage

npx muppet-kit inspector

Features

Explorer - Explore the MCP server's capabilities, while leveraging AI to assist you.
Playground - Test the MCP server with different LLMs and configurations.
MCP Scan - Scan the MCP server for vulnerabilities and security issues.
Tracing - Trace the requests and responses between the client and server. Tunneling is also supported for connecting to remote clients.
History - View the history of requests and responses between the client and server for the current session.

Configuration

You can configure the inspector by creating a muppet.config.js/muppet.config.ts file in the root of your project. The configuration file should export an object with the following properties:

import { defineInspectorConfig } from "muppet-kit";
import { ngrok } from "muppet-kit/tunnel";
import { openai } from "@ai-sdk/openai";

export default defineInspectorConfig({
  // ...
  models: [openai("gpt-4.1-nano")],
  // You can either pass the API key here or have it in .env as NGROK_API_KEY
  tunneling: ngrok(),
});