Resources

Changelog

PayNexus API version history and recent updates.

v2.0.0 - 2026-01-27

  • Updated API base URL to paynexus.co.ke/api
  • Introduced simplified STK Push endpoint (/mpesa/payment/initiate) with auto phone normalization
  • Updated authentication to use X-API-Key header with pk_, sk_, sb_ prefixes
  • Added per-account scoped permissions

v1.5.0 - 2025-10-15

  • Added webhook retry logic
  • Introduced sandbox environment with sb_ keys
  • Added invoice creation and management endpoints

v1.0.0 - 2025-06-01

  • Initial API release with STK Push support
  • Basic payment status checking
  • Webhook support for payment events