SignSimple

{
  "name": "SignSimple",
  "description": "Free, unlimited electronic signature service. Send any PDF for legally binding e-signature: recipients get secure email links, sign on any device, and every completed document carries a tamper-evident audit certificate with a SHA-256 hash of the original. Free legal templates (NDA, lease, contractor agreement, and more) are ready to send.",
  "url": "https://signsimple.app",
  "provider": {
    "organization": "SignSimple",
    "url": "https://signsimple.app"
  },
  "version": "1.0.0",
  "documentationUrl": "https://signsimple.app/developers",
  "interfaces": {
    "mcp": {
      "transport": "streamable-http",
      "url": "https://signsimple.app/mcp",
      "authentication": {
        "type": "apiKey",
        "in": "header",
        "name": "Authorization",
        "scheme": "Bearer",
        "instructions": "Create a free API key at https://signsimple.app/profile and send it as 'Authorization: Bearer ss_live_...'. Discovery calls (initialize, tools/list, list_templates) need no key."
      }
    },
    "rest": {
      "openapi": "https://signsimple.app/openapi.json"
    }
  },
  "capabilities": {
    "streaming": false,
    "pushNotifications": false
  },
  "defaultInputModes": [
    "application/json"
  ],
  "defaultOutputModes": [
    "application/json"
  ],
  "skills": [
    {
      "id": "send_for_signature",
      "name": "Send a document for signature",
      "description": "Email a PDF to one or more recipients for legally binding electronic signature, with automatic field placement, reminders, and expiration.",
      "tags": [
        "esignature",
        "documents",
        "contracts",
        "pdf"
      ]
    },
    {
      "id": "get_document_status",
      "name": "Track signing progress",
      "description": "Check who has viewed, signed, or declined a sent document, and fetch the signed PDF with its audit certificate once complete.",
      "tags": [
        "esignature",
        "status"
      ]
    },
    {
      "id": "list_templates",
      "name": "Free legal templates",
      "description": "Professionally drafted NDA, lease, contractor agreement, liability waiver, bill of sale, and promissory note templates, ready to send for signature.",
      "tags": [
        "templates",
        "legal",
        "nda",
        "lease"
      ]
    }
  ]
}