Stream Request Updates (SSE)
Server-sent events for the authenticated account’s requests: a snapshot event with the currently in-flight requests on connect, then an update event per status transition (terminal transitions included), with a heartbeat comment every 25s. This is an account-wide activity feed, not a per-request output stream. Authenticate with the Authorization: Key … header or, where headers are unavailable (browser EventSource), the modelrunner_jwt_token query parameter.
Authorizations
Use the format: Key modelrunner_key
Response
text/event-stream of {type: 'snapshot', requests: RequestItem[]} and {type: 'update', request: RequestItem} events.
The response is of type string.

