MCP Peek
Desktop inspector and debugging proxy for MCP servers — see the raw calls
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mcppeek.comAbout MCP Peek
MCP Peek is a desktop application for inspecting and debugging Model Context Protocol servers directly, with no model sitting in the middle. Asking an assistant to try a tool shows you what the model did with it — paraphrased and one step removed; MCP Peek connects straight to the server so you read the actual request, the actual response, and the actual timing. It speaks both stdio and HTTP/SSE transports and handles OAuth or bearer auth, then browses everything a server exposes: tools, resources, resource templates and prompts, each rendered with a live token count so you can see what a server costs your context window before you wire it into an agent. Tool inputs can be filled from a generated form or as raw JSON, and results render as table, JSON, Markdown, HTML, image, text or raw. The Pro tier adds a proxy mode: point Claude or Cursor at MCP Peek instead of the server, and every call your agent makes flows through a live capture log with topology view, per-flow detail, status codes, latency and token counts. The developer is explicit that this is a local debugging passthrough and not a production gateway, hub or multiplexer. It runs on macOS, Windows and Linux.
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Key Features
MCP Peek Pros & Cons
✅ Pros
- +One-time $19 price with no subscription
- +Proxy mode shows exactly what your agent sends, not a summary
- +Cross-platform desktop app rather than a hosted service
⚠️ Cons
- −Deliberately not a production gateway or multiplexer
- −Only useful if you build or debug MCP servers
- −Desktop-only — nothing to share with a team
Who Is MCP Peek Best For?
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