What is mcp-pin?
mcp-pin is a MCP server by GautamTalksDev that stdio proxy that pins every tool definition (name, description, input schema, annotations) when you approve a server and blocks the session, with a diff, if any of it changes later. Also. It is listed under Security and has 3 GitHub stars.
| Type | Mcp server |
|---|---|
| Author | GautamTalksDev |
| Repository | GautamTalksDev/mcp-pin |
| Popularity | 3 GitHub stars |
| Category | Security |
| Security | Low risk (96/100) |
| Rank | #2,691 of 4,418 MCP servers; #128 in Security |
| License | MIT |
| Last commit | 2026-10-17 |
| Runs | Locally |
| Language | TypeScript |
| Platforms | macOS, Windows, Linux |
Is mcp-pin safe to install?
mcp-pin scores 96/100 on the MCPMods security check: Low risk. No checks raised a concern. It passed 5 of 6 checks.
MCP server results come from listing signals: who publishes it, where your data goes and what it can do. The code itself is not scanned yet.
| Check | Result |
|---|---|
| Community-built server | Note |
| Runs on your machine only | Pass |
| No credentials mentioned | Pass |
| Read-only by description | Pass |
| No code execution | Pass |
| Source on GitHub | Pass |
How do I install mcp-pin?
- Find the launch command. The README says how the server starts (npx, uvx, docker or a remote URL) and which API keys it needs.
https://github.com/GautamTalksDev/mcp-pin
- Add it to Claude Code. Replace the part after -- with the command from the README. Remote servers use --transport http with a URL.
claude mcp add mcp-pin -- <command from README> claude mcp add --transport http mcp-pin <server-url>
- Check it connected. This lists your MCP servers and their status.
claude mcp list
Or ask Claude to set it up
Paste this into Claude Code and it installs mcp-pin for you:
Add the "mcp-pin" MCP server from https://github.com/GautamTalksDev/mcp-pin to Claude Code. Read its README for the launch command and any API keys I need, run claude mcp add, then check that it connects.