API Overview

API Overview#

Signr exposes a REST API for programmatic access to all platform features. Use it to automate document generation, sending, and status tracking from your applications.

Base URL#

https://api.signr.app/v1

Authentication#

All API requests require a Bearer token. Generate an API key from the Settings → API Keys section in your project.

curl -H "Authorization: Bearer YOUR_API_KEY" \
  https://api.signr.app/v1/envelopes

Core Endpoints#

| Method | Endpoint | Description | | ------ | -------------------------- | --------------------------- | | GET | /templates | List all templates | | POST | /templates | Upload a new template | | GET | /workflows | List all workflows | | POST | /envelopes | Create and send an envelope | | GET | /envelopes/:id | Get envelope status | | GET | /envelopes/:id/documents | Download signed documents |

Response Format#

All responses follow the standard API envelope format:

{
  "success": true,
  "data": { ... },
  "meta": {
    "requestId": "req_abc123",
    "timestamp": "2026-02-18T12:00:00Z"
  }
}

Rate Limits#

API requests are rate-limited to protect service stability:

| Plan | Rate Limit | | ---------- | ------------------- | | Free | 100 requests/hour | | Pro | 1,000 requests/hour | | Enterprise | Custom |

Error Handling#

Error responses include a machine-readable error code and human-readable message:

{
  "success": false,
  "error": {
    "code": "ENVELOPE_NOT_FOUND",
    "message": "No envelope found with the given ID."
  }
}