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SSE Streaming

Any .http or .flow request that returns Content-Type: text/event-stream is detected automatically — the Results Panel switches to a live event timeline and events stream in as the server emits them. No extra setup.

Live timeline

15:42:01.001  message_start
              {"type":"message_start"}
15:42:01.005  content_block_delta
              {"type":"content_block_delta","delta":{"text":"Hello"}}
15:42:01.050  message_stop
              {"type":"message_stop"}

Filter by event name or free-text
Copy all events as JSONL
Stop to close the stream manually
Summary bar on close: total events, bytes, duration

Scripted assertions (Pro)

Inside .http / .flow files you can assert on events:

### Stream a completion
POST {{baseUrl}}/v1/chat/completions
Accept: text/event-stream

# @expect event message_start within 5000
# @expect event content_block_delta count >= 3
# @expect event done
# @extract event last = content_block_delta
# @assert  last contains "hello"
# @sse-timeout    30000
# @sse-reconnect  off

Directives

Directive	Description
`@expect event <name>`	Require at least one event of this name
`@expect event <name> within <ms>`	With a per-event timeout
`@expect event <name> count >= <n>`	Require at least N events
`@extract event <var> = <name>`	Capture the last payload of the named event
`@sse-timeout <ms>`	Maximum total stream duration (default 60s)
`@sse-reconnect on\|off`	Reconnect on drop — Pro

See the SSE reference for the complete set.

Free vs Pro

Capability	Free	Pro
Auto-detection + live timeline	✓	✓
Event filter, search, copy	✓	✓
`@expect event` / `@extract event`	—	✓
`@sse-reconnect`	—	✓

See also