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mcp-pin

Official registry Other

Check if an MCP server's tool definitions changed after approval, from a signed public log.

Source code Website

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

NPM package mcp-pin
Claude Code 
claude mcp add mcp-pin -- npx -y mcp-pin@0.2.3 lookup
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "mcp-pin": {
            "command": "npx",
            "args": [
                "-y",
                "mcp-pin@0.2.3",
                "lookup"
            ]
        }
    }
}

Frequently asked questions

What is mcp-pin?

Check if an MCP server's tool definitions changed after approval, from a signed public log.

How do I install mcp-pin?

It runs on your machine. In Claude Code: claude mcp add mcp-pin -- npx -y mcp-pin@0.2.3 lookup. For other clients, paste the JSON configuration from this page into their MCP settings.

Does mcp-pin need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is mcp-pin open source?

Its code is public on GitHub, but the repository does not declare a standard license.

Who maintains mcp-pin?

It is published by GautamTalksDev. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.