Server-Sent Events (SSE)
A one-way HTTP stream where the server pushes named events as they happen.
What it means
Server-Sent Events use an ordinary HTTP response that stays open. The server writes frames made of an event: line, a data: line and a blank line, and the client reads them as they arrive.
How Onekey handles it
Send Accept: text/event-stream to /v1/batch, /v1/search/multi or /v1/creator/card and rows arrive as each settles: a leg frame per row, a fused frame if you asked for fuse=rrf, and a final done frame. A stream that closes without done was interrupted. Single endpoints do not stream.