attesto-mcp

An MCP server exposing Attesto evidence tools to MCP clients (Claude Desktop, Claude Code, or any MCP-compatible host). It contains no AI: five deterministic tools over the Attesto SDK.

Payloads are refused if they contain the value of any secret-looking environment variable (*_KEY, *_TOKEN, *_SECRET, *_PASSWORD) — an MCP host's environment can never leak into committed evidence (test-enforced).

Install & configure

pip install attesto-mcp

Claude Desktop (claude_desktop_config.json) or Claude Code (.mcp.json):

{
  "mcpServers": {
    "attesto": {
      "command": "attesto-mcp",
      "env": {
        "ATTESTO_API_KEY": "atto_...",
        "ATTESTO_BASE_URL": "https://api.attesto.eu"
      }
    }
  }
}

Verification tools run locally (the P1.1/P1.3 offline verifiers): the only trust anchor is the witness public key you pass in.