About Kit
Kit is an MCP server published by muppet-dev in the Developer Tools category: debugging and Testing tool for MCP servers.
The repository has 58 stars and 8 forks, with the last commit a year ago. Six months or more without a commit doesn't mean the server is broken, but check the open issues before depending on it in production.
Install
git clone https://github.com/muppet-dev/kitThis server has no ConduID identity, so agent calls to it are not receipted. Pin the version you install and review the source before granting it credentials.
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Security checks
Static checks derived from the repository 2 hours ago. Heuristics on the source, not an audit.
- ✓README presentThe repository ships documentation.
- ✓License declaredUsable under a stated license.
- !Tests presentNo tests found. Behaviour changes may go unnoticed between versions.
- ✓Dependencies pinnedA lockfile pins dependency versions.
- !No dynamic code executionSource scan found eval or shell execution. Review how tool inputs reach it before granting credentials.
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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(),
});
Credits
The idea for this project was inspired by the official MCP Inspector and their amazing work.
README fetched from the repository 2 hours ago. The original is authoritative.