How Do You Stream API Responses Using Server-Sent Events (SSE)?

TL;DR Use Server-Sent Events (SSE) to stream API responses over HTTP. Set Content-Type: text/event-stream and write events as data: {json}\n\n . SSE is effective for streaming AI responses, progress updates, and live feeds. Modern PetstoreAPI implements SSE for AI pet recommendations and order status updates. Try Apidog today Introduction If your API generates AI recommendations for pets and the response takes 10 seconds, don't make users wait for the full response. Stream results as they're generated for a real-time experience using Server-Sent Events (SSE). SSE enables you to stream results to the user as soon as they're available, improving perceived responsiveness. Modern PetstoreAPI leverages SSE for AI recommendations, order status, and inventory updates. If you need to test streaming APIs, Apidog supports SSE testing and validation. SSE Basics SSE provides HTTP-based, one-way streaming from server to client. SSE Format Content-Type: text/event-stream Cache-Control: no-cache data