MCP Playground Online

MCP Playground Online is the fastest way to build, test, and secure Model Context Protocol (MCP) servers — all from your browser.

No installs. No setup. Just open and start shipping.

Whether you're debugging a freshly deployed server, learning MCP fundamentals, or probing for security gaps, MCP Playground brings everything into one unified workspace.

🔌 Test any MCP server — instantly Connect to remote MCP servers via SSE or Streamable HTTP. Invoke tools, inspect live JSON-RPC payloads, and debug interactions in real time — all without leaving your browser.

🔐 Built-in security scanner Run an instant 18-point security audit on any MCP server. Detect issues across auth, CORS, HTTPS/HSTS, rate limiting, headers, error leakage, and handshake validation. Get a clear A–F grade plus a prioritized fix list — exactly how attackers evaluate your system.

🛠️ Live MCP servers (ready to use) Skip setup with pre-hosted servers for echo, auth, error handling, and full SDK workflows. Experiment, learn, and validate ideas without touching your infrastructure.

📚 Agent Skills library Access 44 production-ready Claude Code skills across 10 categories — including DevOps, Security, Testing, AI/LLMs, Databases, and Architecture. Copy, plug in, and accelerate your workflows instantly.

📖 Guides + Registry Explore in-depth MCP tutorials and browse a live registry of community servers — everything you need to go from idea to production.

🚀 The complete MCP workbench Free. Browser-based. No account required.