SSE (Server-Sent Events) is a simple protocol from the HTML5 spec that delivers a one-way live stream of data from server to client. Unlike WebSocket, it runs straight over HTTP, supports automatic reconnection and demands far less infrastructure — which is why it has become the de facto standard for Streaming output in LLM APIs. OpenAI, Anthropic and other major providers stream their tokens over SSE, consumed in the browser via EventSource or custom fetch parsers. With years of browser-compatibility maturity behind it, SSE is now the preferred choice over WebSocket for simple, reliable streams.
MEVZU N°124ISTANBULYEAR I — VOL. III
Glossary · Intermediate · 2009
Server-Sent Events (SSE)
A simple HTTP-based standard for one-way live streams from server to browser.
- EN — English term
- Server-Sent Events (SSE)
- TR — Turkish term
- Sunucu-Gönderimli Olaylar (SSE)