Pincer-MCP

A security-hardened MCP gateway that acts as a stateless intermediary to prevent agents from seeing real API keys. It uses a proxy token architecture where the agent only knows a unique proxy token, while Pincer manages the mapping to real credentials stored in the OS keychain. It supports tools for Gemini, OpenAI, Claude, OpenRouter, and GPG signing/decryption.

Package and access

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

Community listingLocal stdioSource reviewed; not executedPublished by VouchlyAI

Vendor documentation

What you can do with it

Secure Google Gemini API calls
Chat completions with OpenAI GPT models
Sign data or files using a GPG/PGP private key
Decrypt PGP-encrypted data using a vault-stored private key

Source and maintenance

Community listingRegistry 0.1.5

mcp-registry: io.github.VouchlyAI/pincer@0.1.5 Source repository

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.

pincer-mcp 0.1.5

npm

pincer-mcp package definition

{
  "version": "0.1.5",
  "transport": "stdio",
  "identifier": "pincer-mcp",
  "registryType": "npm",
  "environmentVariables": [
    {
      "name": "PINCER_PROXY_TOKEN",
      "format": "string",
      "isRequired": true,
      "description": "Proxy token for agent authentication (generated via 'pincer agent add')"
    },
    {
      "name": "OPENWEBUI_URL",
      "format": "string",
      "description": "Optional: Base URL for OpenWebUI instance"
    },
    {
      "name": "OPENAI_COMPATIBLE_URL",
      "format": "string",
      "description": "Optional: Base URL for OpenAI-compatible instance"
    },
    {
      "name": "AUDIT_LOG_PATH",
      "format": "string",
      "description": "Optional: Custom path for audit logs (default: ~/.pincer/audit.jsonl)"
    }
  ]
}

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": {
    "pincer-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "pincer-mcp@0.1.5"
      ],
      "env": {
        "PINCER_PROXY_TOKEN": "<YOUR_PINCER_PROXY_TOKEN>",
        "OPENWEBUI_URL": "<YOUR_OPENWEBUI_URL>",
        "OPENAI_COMPATIBLE_URL": "<YOUR_OPENAI_COMPATIBLE_URL>",
        "AUDIT_LOG_PATH": "<YOUR_AUDIT_LOG_PATH>"
      }
    }
  }
}

Cline

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

Cline configuration

{
  "mcpServers": {
    "pincer-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "pincer-mcp@0.1.5"
      ],
      "env": {
        "PINCER_PROXY_TOKEN": "<YOUR_PINCER_PROXY_TOKEN>",
        "OPENWEBUI_URL": "<YOUR_OPENWEBUI_URL>",
        "OPENAI_COMPATIBLE_URL": "<YOUR_OPENAI_COMPATIBLE_URL>",
        "AUDIT_LOG_PATH": "<YOUR_AUDIT_LOG_PATH>"
      }
    }
  }
}

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": {
    "pincer-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "pincer-mcp@0.1.5"
      ],
      "env": {
        "PINCER_PROXY_TOKEN": "<YOUR_PINCER_PROXY_TOKEN>",
        "OPENWEBUI_URL": "<YOUR_OPENWEBUI_URL>",
        "OPENAI_COMPATIBLE_URL": "<YOUR_OPENAI_COMPATIBLE_URL>",
        "AUDIT_LOG_PATH": "<YOUR_AUDIT_LOG_PATH>"
      }
    }
  }
}

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": {
    "pincer-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "pincer-mcp@0.1.5"
      ],
      "env": {
        "PINCER_PROXY_TOKEN": "<YOUR_PINCER_PROXY_TOKEN>",
        "OPENWEBUI_URL": "<YOUR_OPENWEBUI_URL>",
        "OPENAI_COMPATIBLE_URL": "<YOUR_OPENAI_COMPATIBLE_URL>",
        "AUDIT_LOG_PATH": "<YOUR_AUDIT_LOG_PATH>"
      }
    }
  }
}

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