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OpenAPI Specification

openapi: 3.2.0
info:
  title: Eight Sleep Unofficial Community Trends API
  description: UNOFFICIAL, community-reverse-engineered specification of the Eight Sleep client API that powers the Eight Sleep mobile app.
  contact:
    name: Eight Sleep
    url: https://www.eightsleep.com
  version: unofficial-v1
servers:
- url: https://auth-api.8slp.net
  description: Authentication host (OAuth2 token issuance)
- url: https://client-api.8slp.net
  description: Client API host (user, device, trends reads)
- url: https://app-api.8slp.net
  description: App API host (temperature, away mode, base, alarms, routines)
tags:
- name: Trends
  description: Per-night sleep and biometric trend reads (unofficial).
paths:
  /v1/users/{userId}/trends:
    get:
      operationId: getTrends
      tags:
      - Trends
      summary: Get sleep trends (unofficial)
      description: UNOFFICIAL read against client-api.8slp.net returning per-night sleep trend data - sleep score, sleep-stage breakdown, heart rate, HRV, respiratory rate, and toss-and-turn metrics - over a date range.
      servers:
      - url: https://client-api.8slp.net
      security:
      - bearerAuth: []
      parameters:
      - $ref: '#/components/parameters/UserId'
      - name: tz
        in: query
        required: false
        description: IANA timezone used to bucket nights (e.g. America/New_York).
        schema:
          type: string
      - name: from
        in: query
        required: false
        description: Start date (YYYY-MM-DD).
        schema:
          type: string
          format: date
      - name: to
        in: query
        required: false
        description: End date (YYYY-MM-DD).
        schema:
          type: string
          format: date
      responses:
        '200':
          description: Trends payload.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TrendsResponse'
        '401':
          description: Missing or expired token.
components:
  parameters:
    UserId:
      name: userId
      in: path
      required: true
      description: Eight Sleep user identifier.
      schema:
        type: string
  schemas:
    TrendsResponse:
      type: object
      properties:
        days:
          type: array
          items:
            type: object
            properties:
              day:
                type: string
                format: date
              score:
                type: integer
                description: Sleep fitness score.
              sleepDuration:
                type: integer
                description: Total sleep in seconds.
              presenceDuration:
                type: integer
              sleepStages:
                type: array
                items:
                  type: object
                  properties:
                    stage:
                      type: string
                      enum:
                      - awake
                      - light
                      - deep
                      - rem
                      - out
                    duration:
                      type: integer
              heartRate:
                type: number
              hrv:
                type: number
              respiratoryRate:
                type: number
              tnt:
                type: integer
                description: Toss-and-turn count.
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: Bearer access token issued by POST /v1/tokens on auth-api.8slp.net. Unofficial.