Inspect remote MCP servers in the browser
The MCPHub playground is a free MCP inspector for remote Model Context Protocol servers. Paste a Streamable HTTP or SSE endpoint, connect, and explore the server surface: tools, resources, resource templates, prompts, and tasks. When a tool looks useful, edit JSON arguments and run it without leaving the page.
Use it to verify a new remote MCP before adding it to Cursor, to debug auth headers, or to try a server from the MCP server catalog. Catalog pages with a public URL include a Try on playground link that pre-fills this editor.
Streamable HTTP and SSE
Prefer Streamable HTTP for current remote MCP deployments. Choose SSE (legacy) only when the server still exposes the older HTTP+SSE transport. Stdio-only servers are not reachable from the browser until you publish them behind a public tunnel URL (for example via ngrok or Cloudflare Tunnel).
CORS, proxy, and privacy
The playground tries a direct browser connection first. If the remote server blocks cross-origin requests, traffic falls back to a same-origin proxy on MCPHub. Private network and metadata addresses are blocked on the proxy to reduce SSRF risk. Optional headers (such as Authorization) stay in your session for the request; there is no account and no long-term storage of tokens on this page.
What you can do after connecting
- Browse and search tools, then call them with JSON arguments
- Read resources and inspect resource templates
- Load prompts with argument drafts from the server schema
- Check active tasks when the server supports them
- See whether the session used a direct connection or the CORS proxy
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