Touchstone MCP Server: Install & Setup

Install Touchstone in Claude Code

Remote URL

Claude Code

claude mcp add --transport http touchstone https://touchstone.cv/mcp

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

{
  "mcpServers": {
    "touchstone": {
      "url": "https://touchstone.cv/mcp"
    }
  }
}

npm

Claude Code

claude mcp add touchstone -e TOUCHSTONE_RECORDER=... -e TOUCHSTONE_SUBJECT=... -e TOUCHSTONE_API_KEY=... -- npx -y @touchstone-cv/mcp

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

{
  "mcpServers": {
    "touchstone": {
      "command": "npx",
      "args": [
        "-y",
        "@touchstone-cv/mcp"
      ],
      "env": {
        "TOUCHSTONE_RECORDER": "...",
        "TOUCHSTONE_SUBJECT": "...",
        "TOUCHSTONE_API_KEY": "..."
      }
    }
  }
}

Replace each ... with your own value.

Frequently asked questions

What does the Touchstone MCP server do?

Bitcoin-anchored, tamper-evident audit log for AI agents — record, disclose and verify actions.

Is the Touchstone 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 Touchstone run locally or remotely?

Local + Remote. Can run locally or be used as a hosted remote server.

How do I add Touchstone to Claude Code?

Run: claude mcp add --transport http touchstone https://touchstone.cv/mcp

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