MCP Playground is the fastest way to discover, inspect, and test MCP servers — directly in your browser. Use these guides to get the most out of it.
What MCP Playground is, how it works, and what you can do with it.
How to connect to any remote MCP server — including auth headers and transport options.
Run stdio-based npm MCP servers entirely in your browser with no local setup.
Embed an interactive playground in your docs, share reproducible execution links, and use README badges.
Expose a local stdio server over HTTP with supergateway or mcp-proxy so you can test it here.
REST API for checking server health, inspecting capabilities, and browsing the registry programmatically.
Grade your MCP server's quality. Check tool descriptions, schema completeness, and estimate token cost.
Registry-wide quality leaderboard. Scan every live MCP server, grade them A–F, and export results as CSV.
Answers to the most common questions about MCP Playground and the Model Context Protocol.
Something not covered here? Open an issue on GitHub or check the official MCP specification.