ShapeMCP/Docs/Mcp Tester

MCP Server Tester (Inspector)

A professional browser-based client for live debugging of MCP servers. It performs the full JSON-RPC handshake (initialize, initialized, list_tools) and lets you call tools with auto-generated forms based on each tool’s inputSchema. Supports both SSE and HTTP transports.

Features

Connection presets for public MCP servers, bearer token and custom headers, human-readable diagnostics with guided fixes, and a “Run locally” flow for testing servers running on localhost. The inspector validates responses and highlights schema and protocol issues.

Presets

Use a preset to quickly connect to a known server, or enter a custom URL and transport (SSE/HTTP). For local development, use “Run Locally” to get a command you can run in your terminal to start the server and avoid browser CORS limits.