@signatrust/mcp-server

Send and verify e-signatures from Claude — zero-custody, with independently verifiable cryptographic evidence for every signature.

Model Context Protocol (MCP) server for the SignaTrust document signing API. Enables AI assistants like Claude to create envelopes, manage templates, check signing status, and verify blockchain anchors via natural language.

Quick Start

Claude Code

claude mcp add signatrust -- npx -y @signatrust/mcp-server

Then set your API key in the MCP server environment.

Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "signatrust": {
      "command": "npx",
      "args": ["-y", "@signatrust/mcp-server"],
      "env": {
        "SIGNATRUST_API_KEY": "sk_live_your_key_here"
      }
    }
  }
}

Cursor

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (per-project):

{
  "mcpServers": {
    "signatrust": {
      "command": "npx",
      "args": ["-y", "@signatrust/mcp-server"],
      "env": {
        "SIGNATRUST_API_KEY": "sk_live_your_key_here"
      }
    }
  }
}

VS Code

Add to .vscode/mcp.json (note the top-level key is servers, not mcpServers):

{
  "servers": {
    "signatrust": {
      "command": "npx",
      "args": ["-y", "@signatrust/mcp-server"],
      "env": {
        "SIGNATRUST_API_KEY": "sk_live_your_key_here"
      }
    }
  }
}

To keep the key out of the file, use an input prompt instead of env:

{
  "inputs": [
    { "id": "signatrust-key", "type": "promptString", "description": "SignaTrust API key", "password": true }
  ],
  "servers": {
    "signatrust": {
      "command": "npx",
      "args": ["-y", "@signatrust/mcp-server"],
      "env": { "SIGNATRUST_API_KEY": "${input:signatrust-key}" }
    }
  }
}

Available Tools

Three-tier security. create_envelope accepts securityLevel: STANDARD (bearer token only), VERIFIED (adds SMS/email OTP — recommended for employment, vendor, or healthcare consent), or CERTIFIED (adds WebAuthn biometric + device binding — recommended for real est

... View full README on GitHub