Tool Call Witness MCP Server: Install & Setup

Install Tool Call Witness in Claude Code

Claude Code

claude mcp add --transport http tool-call-witness https://toolcallwitness.clauxel.com/mcp

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "tool-call-witness": {
      "url": "https://toolcallwitness.clauxel.com/mcp"
    }
  }
}

Frequently asked questions

What does the Tool Call Witness MCP server do?

A witness layer for AI agent tool calls.

Is the Tool Call Witness MCP server free?

The server is free, but you will likely need an account. The server itself is free, but it connects to a service that needs an account or API key, which may have paid tiers. Check the provider for current pricing.

Does Tool Call Witness run locally or remotely?

Remote. Hosted by the provider. You connect with a URL, nothing to install.

How do I add Tool Call Witness to Claude Code?

Run: claude mcp add --transport http tool-call-witness https://toolcallwitness.clauxel.com/mcp

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