Recommended bedtimes from a wake time
API · /sleep-api
Sleep Cycle API
healthy
4,034 Subscribers
Sleep-cycle planning as an API, built around the fact that a full sleep cycle averages about 90 minutes and that waking at the end of a cycle — rather than mid-cycle — leaves you feeling more refreshed. The bedtime endpoint takes a wake-up time and suggests the times to fall asleep so that you wake at the end of a whole number of cycles (6, 5, 4 or 3 cycles), allowing for the time it takes to drift off. The wake-time endpoint does the reverse: from a bedtime (or "now") it suggests the best times to set an alarm. The duration endpoint takes a bedtime and a wake time and reports time in bed, actual sleep, the number of full cycles, how many minutes you are into the current cycle and how close you are to a clean cycle boundary, with a healthy-duration assessment. The nap endpoint plans power, short, slow-wave and full-cycle naps from a start time and explains the trade-offs. All clock maths is modulo 24 hours and accepts both 24-hour ("23:15") and 12-hour ("10:30 PM") times. Everything is computed locally and deterministically, so it is instant and private. Ideal for sleep, alarm-clock and wellbeing apps, smart-home routines, shift-work planning and productivity tools. Pure local computation — no key, no third-party service, instant. Live, nothing stored. INFORMATIONAL ONLY — sleep needs vary by individual; not medical advice. 4 endpoints. This is sleep-cycle timing maths; for time-zone conversion use a time API and for body metrics such as BMI use a health-calculator API.
api.oanor.com/sleep-api
API health
healthy- Uptime
- 100.00%
- Server probes · 24h
- Avg latency
- 75 ms
- Server probes · 24h
- Subscribers
- 4,034
- active
- Total calls
- 95
- last 7 days
Pricing
Pick a tier — billed monthly, cancel anytime.
Free
Free
- 8,935 calls / month
- 2 requests / second
- Hard cap (429 above quota, no overage)
- 8,935 calls/month
- 2 req/sec
- Bedtime + wake-time + duration + nap
- No credit card
Starter
€10.45 /month
- 18,550 calls / month
- 8 requests / second
- Hard cap (429 above quota, no overage)
- 18.55k calls/month
- 8 req/sec
- 12h & 24h time formats
- Email support
Pro
€30.35 /month
- 235,500 calls / month
- 20 requests / second
- Hard cap (429 above quota, no overage)
- 235.5k calls/month
- 20 req/sec
- Sleep / wellbeing pipelines
- Priority support
Mega
€68.35 /month
- 1,220,000 calls / month
- 50 requests / second
- Hard cap (429 above quota, no overage)
- 1.22M calls/month
- 50 req/sec
- Platform scale
- Dedicated SLA
Built by
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api.oanor.com/caffeine-api
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api.oanor.com/proglang-api
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api.oanor.com/mimetypes-api
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api.oanor.com/musicbrainz-api
Frequently asked questions
Quick answers about pricing, quotas, and integration.
How do I get an API key for Sleep Cycle API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Sleep Cycle API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Sleep Cycle API?
Free tier allows 1 request per second. Paid plans scale up to 50 requests per second on the Mega tier. Hard limits return HTTP 429 above the quota — no surprise overage charges.
How much does Sleep Cycle API cost?
Sleep Cycle API has a free tier with 100 calls / month. Paid plans start at €10.45 / month with higher quotas and faster rate limits.
Can I cancel my subscription anytime?
Yes. Plans are billed monthly and you can cancel anytime from your billing dashboard. No long-term contracts and no cancellation fee.
Is Sleep Cycle API GDPR-compliant?
All requests to Sleep Cycle API go through our EU-based gateway. Your upstream API key never leaves our server and no personal data is shared with the upstream provider beyond the request you send.
Pick an endpoint from the list on the left to see its details and try it.
Code snippets
Sign up to get an API key, then call any path under your slug.
curl https://api.oanor.com/sleep-api/SOME_PATH \
-H "x-oanor-key: oanor_test_..."const res = await fetch("https://api.oanor.com/sleep-api/SOME_PATH", {
headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();$ch = curl_init("https://api.oanor.com/sleep-api/SOME_PATH");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
$response = curl_exec($ch);import requests
r = requests.get(
"https://api.oanor.com/sleep-api/SOME_PATH",
headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())Ratings
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