API URL Changes - September 2026

Audience

Organisations who:

  • Consume AEMO internet-facing APIs.
  • Maintain system-to-system integrations with AEMO APIs.
  • Use applications, middleware or scripts connecting directly to affected API endpoints.

Contents

Summary

  • API URL changes are now in pre-production.
  • Participants must update their internet-facing pre-production and production API endpoints to new URLs.
  • HTTPS port change: All new API URLs will use the default HTTPS port 443 instead of the old port 9319, eliminating the need to specify the port number in connections.
  • Tables list old and new URLs for NEM, WEM, and GAS APIs, showing migration from old to new URLs without port specification.

Status: In pre-production

Marked up

Clean

Release date

  • Pre-production: 17 June 2026

  • Production: 23 September 2026

  • Decommissioning legacy URLs: 1 December 2026