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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

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](https://docs.signflow.com/api)
  • SDK Downloads: GitHub
  • Postman Collection: Available

    • Getting Started

  • Generate a v2 API key in Settings
  • Update your integration
  • Test in sandbox
  • Go live

    • View API documentation

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