mcp-pin MCP

A local proxy and public log for Model Context Protocol servers that records SHA-256 fingerprints of tool definitions upon approval. It monitors every tools/list response during a session and blocks execution if definitions drift, ensuring agents only run approved tool instructions.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Community listingLocal stdioSource reviewed; not executedPublished by GautamTalksDev

Vendor documentation

What you can do with it

Block tool definition drift in approved MCP servers
Verify server integrity via signed public log
Pin specific server versions to prevent code changes

Source and maintenance

Community listingRegistry 0.2.4

mcp-registry: io.github.GautamTalksDev/mcp-pin@0.2.4 Source repository Project website

Maintenance checked: Oct 31, 2026, 10:27 PM UTC

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

mcp-pin 0.2.4

npmnpx

mcp-pin package definition

{
  "version": "0.2.4",
  "transport": "stdio",
  "identifier": "mcp-pin",
  "runtimeHint": "npx",
  "registryType": "npm",
  "packageArguments": [
    {
      "type": "positional",
      "value": "lookup",
      "description": "Run mcp-pin as an MCP server with four read-only lookup tools."
    }
  ]
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.

Cursor configuration

{
  "mcpServers": {
    "mcp-pin-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-pin@0.2.4",
        "lookup"
      ]
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.

Cline configuration

{
  "mcpServers": {
    "mcp-pin-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-pin@0.2.4",
        "lookup"
      ]
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.

VS Code configuration

{
  "servers": {
    "mcp-pin-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "mcp-pin@0.2.4",
        "lookup"
      ]
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.

Claude Desktop configuration

{
  "mcpServers": {
    "mcp-pin-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-pin@0.2.4",
        "lookup"
      ]
    }
  }
}

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