sigil

About sigil

Use sigil with your agent

claude mcp add sigil -- npx -y sigild

{
  "mcpServers": {
    "sigil": {
      "command": "npx",
      "args": [
        "-y",
        "sigild"
      ]
    }
  }
}

Frequently asked questions

What is sigil?

sigil is an MCP (Model Context Protocol) server by cdrn in the E-commerce & Retail category. Local keystore + MCP server. Claude can sign EVM transactions but never sees the private key.

How do I connect sigil to Claude, Cursor, or another MCP client?

Install sigil from its npm package (sigild) and register it under "mcpServers" in your client's MCP configuration — for example claude_desktop_config.json or Cursor's mcp.json — then restart the client.

Is sigil open source?

Yes — the source code is public at github.com/cdrn/sigil, with 1 GitHub stars.

Can AI agents pay to use sigil?

Not yet through Loomal — sigil is listed as a free directory entry. If its maintainer verifies ownership, they can set per-call USDC pricing that agents pay over x402, with settlement on Base.