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API · /onthisday-api

On This Day API

healthy 3,907 Subscribers

Historical events, notable births and deaths, and holidays for any calendar date — "on this day in history" — relayed live from Wikipedia. Get today's curated highlights, or pass any date (e.g. 07-20 → Apollo 11 Moon landing among the events) to retrieve notable events, births, deaths, holidays/observances, or the editor-selected highlights. Every entry carries the year, a one-line description and a link to the relevant Wikipedia article. Ideal for "today in history" widgets, daily-content apps, trivia, newsletters and educational tools.

#on-this-day #history #events #wikipedia #today #calendar
api.oanor.com/onthisday-api
Get an API key Try in playground → Contact provider

Machine-readable spec so AI agents can integrate this API.

/api/onthisday-api/openapi.json
/api/onthisday-api/llms.txt

Discovery: GET /api/index.json lists every API.

On This Day API — live data on the oanor API marketplace

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
1233 ms
Server probes · 24h
Subscribers
3,907
active
Total calls
95
last 7 days
status Full status page → · 15 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 5,500 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 5,500 calls/month
  • 2 req/sec
  • Today + events + holidays
  • No credit card
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Starter

€4.20 /month

  • 60,000 calls / month
  • 8 requests / second
  • Hard cap (429 above quota, no overage)
  • 60k calls/month
  • 8 req/sec
  • Births / deaths / selected
  • Email support
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Pro

€12.50 /month

  • 300,000 calls / month
  • 20 requests / second
  • Hard cap (429 above quota, no overage)
  • 300k calls/month
  • 20 req/sec
  • Today-in-history widgets
  • Priority support
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Mega

€33.00 /month

  • 1,500,000 calls / month
  • 50 requests / second
  • Hard cap (429 above quota, no overage)
  • 1.5M calls/month
  • 50 req/sec
  • Content platform
  • Dedicated SLA
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Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for On This Day API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call On This Day API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for On This Day 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 On This Day API cost?
On This Day API has a free tier with 100 calls / month. Paid plans start at €4.20 / 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 On This Day API GDPR-compliant?
All requests to On This Day 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/onthisday-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/onthisday-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/onthisday-api/SOME_PATH");
curl_setopt($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/onthisday-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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