mcp-signer

About mcp-signer

Use mcp-signer with your agent

claude mcp add mcp-signer -- npx -y @cryptoapis-io/mcp-signer

{
  "mcpServers": {
    "mcp-signer": {
      "command": "npx",
      "args": [
        "-y",
        "@cryptoapis-io/mcp-signer"
      ]
    }
  }
}

Frequently asked questions

What is mcp-signer?

mcp-signer is an MCP (Model Context Protocol) server by cryptoapis-io. MCP server for local transaction signing on EVM, UTXO, Tron, and XRP — no API calls needed

How do I connect mcp-signer to Claude, Cursor, or another MCP client?

Install mcp-signer from its npm package (@cryptoapis-io/mcp-signer) 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 mcp-signer open source?

Yes — the source code is public at github.com/cryptoapis-io/cryptoapis-mcp-signer.

Can AI agents pay to use mcp-signer?

Not yet through Loomal — mcp-signer 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.