Sleep

Stream: session | Event type: sleep

A sleep period with duration, sleep stage breakdown, and overnight biometrics.

Example

{
  "event_type": "sleep",
  "data_version": "1.1",
  "source_id": "b2c3d4e5...",
  "provider_ref": "67890",
  "device_id": "dev-001",
  "payload_ts": 1742504100000,
  "revision": 1,
  "capture_mode": null,  "start_time": 1742504100000,
  "end_time": 1742531100000,
  "duration_s": 27000,
  "stages": {
    "awake_s": 1800,
    "light_s": 10800,
    "deep_s": 7200,
    "rem_s": 7200
  },
  "efficiency_pct": 92,
  "heart_rate_avg_bpm": 58,
  "spo2_avg_pct": 96.5,
  "respiratory_rate_avg": 14.2
}

Fields

Field	Type	Unit	Description
start_time	number | null	epoch ms	Sleep start time.
end_time	number | null	epoch ms	Sleep end time.
duration_s	number | null	seconds	Total sleep duration.
stages	object | null	—	Sleep stage breakdown.
stages.awake_s	number | null	seconds	Time spent awake.
stages.light_s	number | null	seconds	Time in light sleep.
stages.deep_s	number | null	seconds	Time in deep sleep.
stages.rem_s	number | null	seconds	Time in REM sleep.
efficiency_pct	number | null	percent	Sleep efficiency (time asleep / time in bed).
heart_rate_avg_bpm	number | null	bpm	Average heart rate during sleep.
spo2_avg_pct	number | null	percent	Average blood oxygen saturation.
respiratory_rate_avg	number | null	breaths/min	Average respiratory rate.