Changelog
August 11, 2026
WebSocket API
The first dated version of the public WebSocket API. Negotiate the udx.json.2026-08-11 subprotocol during the HTTP Upgrade; see versioning for how dated versions work and the WebSocket reference for every message.
Added
- Initial public WebSocket API: authenticated L2 order book subscriptions and recovery.
July 15, 2026
REST API
The first dated version of the public REST API. Send UDX-Version: 2026-07-15 to pin it; see versioning for how dated versions work and the API reference for every operation.
Added
- Initial public REST API.