MCP Peek
See what your AI agent really sends to MCP servers
MCP Peek launched on June 26, 2026 with 3 votes, #6,658 of 22,647 launches that month and more than 50% of that year's launches.
What it does
MCP Peek is a desktop app to inspect, run, and proxy Model Context Protocol (MCP) servers. See every tool, resource and prompt, run them, and capture traffic.
The desktop tool for inspecting and debugging MCP servers. Connect to any server, run its tools by hand, and read the real request, response, and timing behind every call — no model in the middle, no guessing. MCP Peek is a developer tool for inspecting and debugging MCP servers — not a hub, gateway, or multiplexer. Asking an assistant to "try the tool" shows you what the model did with it — paraphrased, lossy, one step removed. MCP Peek connects straight to the server, so when you're building or debugging you work with the real thing: Point Claude or Cursor at MCP Peek while you build, and watch the signal move — every call, its timing, tokens, and full request/response, plus a topology…from mcppeek.com
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MCP-Shield – Detect security issues in MCP servers2025 · github.com · ▲134I noticed the growing security concerns around MCP (https://news.ycombinator.com/item?id=43600192) and built an open source tool that can detect several patterns of tool poisoning attacks, exfiltration channels and cross-origin manipulations. MCP-Shield scans your installed servers (Cursor, Claude Desktop, etc.) and shows what each tool is trying to do at the instruction level, beyond just the API surface. It catches hidden instructions that try to read sensitive files, shadow other tools' behavior, or exfiltrate data. Example of what it detects: - Hidden instructions…
MCP Defender2025 · mcpdefender.com · ▲152Hi HN, MCP Defender is an open source desktop app that automatically proxies your MCP traffic in AI apps like Cursor, Claude, Windsurf and VSCode. It then scans all requests and responses between the apps and the MCP tools they call. If it detects anything malicious, it alerts you and lets you allow or block the tool call. While the threat landscape of MCP is still being actively researched, there are dangerous things that MCP Defender can block today. For example, a developer asks Cursor to fix a Github issue with an attached crash log. However, the Github issue was created by an attacker…
Mcpsnoop – Wireshark for MCP (transparent proxy and live TUI)Jul 2026 · github.com · ▲64Wireshark for MCP. A transparent proxy that shows every real tool call between your AI client and your MCP servers, live in your terminal. - kerlenton/mcpsnoop
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