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Biorhythm API

Physical, emotional, intellectual and intuitive cycle percentages.

Biorhythm calculation across Physical (23d), Emotional (28d), Intellectual (33d) and Intuitive (38d) cycles with percentage values and critical-day detection.

<10ms typical 6 endpoints included in every plan Explore in API reference

Featured endpoint

POST /v1/biorhythm/calculate

Biorhythm calculation

Physical, emotional, intellectual, and intuitive cycle percentages for a target date.

What you get

  • ✦4 cycles: physical, emotional, intellectual, intuitive
  • ✦Daily percentage values
  • ✦Critical day detection
  • ✦Forecast-friendly output

One call, structured JSON

curl -X POST 'https://astro-vibe-engine.gauravapproved.workers.dev/v1/biorhythm/calculate' \ \
  -H 'X-API-Key: av_YOUR_KEY' \ \
  -H 'Content-Type: application/json' \
  -d '{\n  "birthdate": "1990-05-15T00:00:00Z",\n  "targetDate": "2026-09-01T00:00:00Z"\n}'

All Biorhythm API endpoints

POST /v1/biorhythm/compatibility

Two-person biorhythm compatibility

POST /v1/biorhythm/critical-days

Critical day detection

POST /v1/biorhythm/daily

Seeded daily biorhythm

POST /v1/biorhythm/forecast

Biorhythm forecast

POST /v1/biorhythm/phases

Biorhythm phase info

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