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Product Updates5 min readDecember 18, 2025

Announcing SignFlow API v2

SignFlow API v2 is here with a completely redesigned architecture, faster response times, webhook improvements, and a more intuitive developer experience.

MT

Michael Torres

CTO & Co-founder

Announcing SignFlow API v2

In this article

  • API v2 is Here
  • What's New
  • Migration Guide
  • Documentation
  • Getting Started

API v2 is Here

After months of development, we're thrilled to launch SignFlow API v2.

What's New

RESTful Design

Clean, intuitive endpoints following REST best practices.

Webhooks 2.0

  • More event types
  • Retry logic
  • Signature verification
  • Batch events

Improved Performance

  • 50% faster response times
  • Higher rate limits
  • Better caching

New Capabilities

  • Bulk operations
  • Embedded signing
  • White-label options
  • Custom branding per request

Migration Guide

API v1 will be supported until December 2026.

Breaking Changes

  • Authentication header format
  • Pagination structure
  • Error response format

New Endpoints

  • /v2/envelopes - Document management
  • /v2/templates - Template CRUD
  • /v2/recipients - Recipient management
  • /v2/webhooks - Webhook configuration

Documentation

Full documentation available at:

  • API Reference: docs.signflow.com/api
  • SDK Downloads: GitHub
  • Postman Collection: Available

Getting Started

  1. 1Generate a v2 API key in Settings
  2. 2Update your integration
  3. 3Test in sandbox
  4. 4Go live

View API documentation

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