SSE

OpenAPI 3.2 in 2026: what changed, and why it matters for SSE and AI agents

The 3.1/3.2 line aligned OpenAPI with JSON Schema 2020-12, made null a real type, and cleared the way for proper content negotiation. Here is what to change in existing specs and how streaming endpoints (SSE) fit into a 3.2 document.

Sep 18, 2026 4 min read

How to test Server-Sent Events endpoints: curl, Postman, and spec-driven SSE testing

SSE looks like HTTP until you try to test it: the connection stays open, events have names and ids, heartbeats hide disconnects, and ordinary API clients hang. Here is how to test streams with curl, what Postman does and does not do, and how to make SSE scenarios repeatable from an OpenAPI spec.

Aug 24, 2026 4 min read