Fill stream
Pushes the fills of every entity your account subscribes to; anything you send is ignored. Delivery is best effort and frames are not resent: a gap in seq or a new session means you missed frames, which GET /v1/account/fills returns. One API connection per account. The server pings every 15 seconds.
Header parameters
Your API key.
Query parameters
8 to 64 characters of A-Za-z0-9_-, one per running client and the same on every reconnect, so a reconnect replaces its own dropped connection.
Set to 1 to replace the API client already connected.
Allowed values: 1
Message fields
hello on connecting, then fill. blocked when the connection is refused.
The fill. Every field is on the fill event page.
Changes when you reconnect.
Consecutive within a session.
blocked only: why the connection was refused, such as api_seat_taken.