Pincer

Overview

Pincer is a Model Context Protocol (MCP) server that provides a security-hardened gateway with proxy token architecture for protecting agent secrets. It functions as a secure intermediary that integrates directly into AI assistants, exposing cryptographic and access-control capabilities as tools your model can invoke.

Pincer runs locally via the npm package pincer-mcp, communicating over stdio on your machine. Setup requires the PINCER_PROXY_TOKEN environment variable for authentication. The latest release is v0.1.5, and the source code is available at VouchlyAI/Pincer-MCP on GitHub.

Pincer belongs in the Security category on mcp.site and works with MCP clients including Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, and Zed. If you maintain Pincer, claim this listing to verify ownership and keep information current.

Installation

// claude_desktop_config.json
{
  "mcpServers": {
    "pincer": {
      "command": "npx",
      "args": [
        "-y",
        "pincer-mcp"
      ],
      "env": {
        "PINCER_PROXY_TOKEN": "<pincer-proxy-token>"
      }
    }
  }
}

Requires PINCER_PROXY_TOKEN