◎ Remote endpoint
Raw JSON-RPC body
ⓘ Requests are proxied through a Cloudflare Worker (CORS, HTTPS-only, SSRF-guarded). Auth (Bearer / Basic / custom headers) is forwarded once and never logged or stored.
Model Context Protocol
MCP Server Inspector
Test, inspect, and debug remote MCP servers live — JSON-RPC checks, tool discovery, authentication, and deployment diagnostics, right from your browser.
◎ Worker: checking…
Tokens stay in memory
▤ Response
HTTP—
Latency—
Transport—
Session—
Auth—
Run an action to see the JSON-RPC response…
♢ Checklist
Checks reflect the latest Remote HTTP Test results. Run Initialize → List tools → Call tool to light them all up.
ⓘ Troubleshooting
HTTP 401 / 403Missing or invalid token. Paste a valid Bearer token; it is sent only for the current request.
Blocked targetLocalhost, private IPs and metadata addresses are rejected by the Worker by design. Test those locally.
Empty tools listSome servers require
initialize first. Click Initialize, then List tools so the session id is reused.Timeout / 504The remote server took too long. Increase the request timeout or check that the endpoint is reachable.
Local / stdio server? Generate the npx command
Remote HTTP servers are tested live in the tab above. A local stdio server (for example mcpgateway.wrapper) can only be inspected on your own machine — this just builds the command for you to paste into your terminal.
Generated command
npx @modelcontextprotocol/inspector …