Server-Sent Events

Yaak supports Server-Sent Events (SSE), displaying events as they stream from the server.

Sending an SSE Request

SSE uses standard HTTP requests. Create an HTTP request pointing to your SSE endpoint—Yaak detects the text/event-stream content type and displays events as they arrive.

1. Create a new HTTP request
2. Enter your SSE endpoint URL
3. Click Send

Events appear in the response pane as the server sends them. The connection stays open until the server closes it or you cancel the request.

Streaming Response Behavior

When connected to an SSE endpoint:

• Request shows Connecting until headers are received
• Status code appears when headers arrive
• Size and Time update as each event is received
• Events render as they stream in

This streaming behavior applies to all response types—any response that sends data in chunks shows progressive updates.

Event Display

Events follow the SSE protocol format:

• data - The event payload
• event - Event type name (optional)
• id - Event identifier for resumption (optional)

Each event displays with an index for tracking order in long-running connections.