THE INDEX · INSPECTORS & DEBUGGING
Inspectors & Debugging
Tools for exercising an MCP server by hand: calling tools, reading responses, testing the authorization handshake, and checking conformance against the specification.
12 listings
Compare inspectors & debugging tools →︎How will you inspect behavior and fix failures?
What belongs in this category
- Interactive inspectors and protocol clients
- Command-line tools for calling MCP servers
- Conformance and specification-compliance suites
Workers AI Playground
Inspectors & Debugging
Workers AI Playground is a browser-based tool for connecting to a remote MCP server by URL; once connected, the server's tools become available to an AI model in a built-in chat interface.
SaaS
FLUJO
Inspectors & Debugging
FLUJO is an open-source, local-first application for building AI workflows by connecting models, MCP tools and reusable subflows on a drag-and-drop graph. Flows can be stepped through node by node in its built-in chat debugger, triggered on schedules or events, and served to other applications through OpenAI-compatible and MCP endpoints.
Self-hosted
mcp-cli
Inspectors & Debugging
MCP CLI is a command-line client for Model Context Protocol servers, with a chat mode, a command-driven interactive shell, and a scriptable command mode for pipelines. It connects those servers' tools to LLMs from multiple providers and defaults to a local Ollama model that needs no API key.
CLI tool
MCP Conformance Test Framework
Inspectors & Debugging
A framework for testing MCP (Model Context Protocol) client and server implementations against the specification.
CLI tool
MCP Inspector
Inspectors & Debugging
MCP Inspector is a tool for connecting to an MCP server and exercising it by hand: browsing its resources, listing and running its prompts and tools, and watching the JSON-RPC, HTTP and stdio-stderr traffic of the session. It is published as the npm package `@modelcontextprotocol/inspector` and provides three clients - a web UI, a command-line client and a terminal UI - dispatched from one `mcp-inspector` binary.
Self-hosted
mcp-remote
Inspectors & Debugging
A command-line client for connecting to remote MCP servers with OAuth authentication and support for multiple transport protocols including SSE and HTTP.
CLI tool
mcp-validator
Inspectors & Debugging
Testing suite and reference implementation for validating MCP server implementations against the protocol specification.
CLI tool
MCPJam Inspector
Inspectors & Debugging
Test, debug, and evaluate MCP servers across multiple AI clients. Chat with models to exercise tools, resources, and auth flows.
Hybrid
MCP Tools
Inspectors & Debugging
A command-line interface for discovering, calling, and managing MCP server tools, resources, and prompts.
CLI tool
Postman
Inspectors & Debugging
Postman is an API platform for designing, testing, documenting, and monitoring APIs, with Git and API gateway integrations across the API lifecycle. It also lets users create MCP requests to connect to, experiment with, and evaluate Model Context Protocol servers from within their collections.
SaaS
Smithery CLI
Inspectors & Debugging
Smithery CLI is a command-line tool that connects AI agents to MCP servers and skills. It allows users to search, add, and interact with MCP server tools directly from the terminal.
CLI tool
@wong2/mcp-cli
Inspectors & Debugging
mcp-cli is a command-line inspector for the Model Context Protocol that runs MCP servers from various sources or connects to an already-running server over Streamable HTTP or SSE. It lists and calls tools, reads resources and prompts, supports OAuth for SSE and Streamable HTTP servers, and offers a non-interactive mode for scripting.
CLI tool