mark

publicgatedchannel: markwss://api.staging.sphx.io/v1/ws

Engine mark publications with the current admission band. Emitted per mark update, only for instruments whose api.mark_channel_enabled flag is set by the venue.

Subscribe params: instrument_id (required).

Subscribe

{ "op": "subscribe", "channel": "mark", "params": { "instrument_id": 1000  }

Param	Type	Required	Notes
instrument_id	integer · int64	✓	The instrument to stream

Events

mark

A mark publication applied, with the current admission band.

Field	Type	Required	Description
instrument_id	integer · int64	✓
mark	integer · int64	✓	Engine-derived mark, ticks.
band_lo	integer · int64	✓
band_hi	integer · int64	✓	RC-1 admission band bounds, ticks.
event_seq	integer · int64	✓	Cluster sequence number — monotonic; drives gap detection and REST/WS joins.
ts	integer · int64	✓	Sequenced timestamp of the mark event.

Example frame

{
  "channel": "mark",
  "event": "mark",
  "data": {
    "instrument_id": 1000,
    "mark": 3902,
    "band_lo": 3880,
    "band_hi": 3925,
    "event_seq": 2201,
    "ts": 1779111582959
  }
}