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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.

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
1227 ms
Server probes · 24h
Subscribers
3,907
active
Total calls
305
last 7 days
status Full status page → · 20 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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api.oanor.com/castles-api

Nobel Prize API

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api.oanor.com/nobel-api

iCalendar API

Build a valid RFC 5545 iCalendar (.ics) event from simple parameters — and get ready-to-use "add to calendar" links for Google, Outlook, Office 365 and Yahoo. Pass a title, start and end (ISO 8601 or unix timestamps, in UTC) — or a duration in minutes, or an all-day flag — plus optional location, description, URL, organizer, an RRULE recurrence (e.g. FREQ=WEEKLY) and a reminder (a VALARM N minutes before). The service returns the fully-formed .ics text with correct escaping and 75-octet line folding, a base64 data: URI you can drop straight into a download link, and the four calendar deep-links. A second endpoint parses raw .ics text back into structured JSON events. Everything is computed locally with no network calls, so it is fast and deterministic. Built for booking and scheduling flows, event pages, email "add to calendar" buttons, reminders and no-code automations. A calendar-event builder — distinct from date/time math (datetime), public-holiday data (holidays) and the Jewish calendar (hebcal). No upstream key, no cache.

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Geo Wikipedia API

Wikipedia, located — find the Wikipedia articles near any coordinate ("Wikipedia near me") as an API, live from the official MediaWiki API. Pass a latitude and longitude and get the nearby places, landmarks and points of interest with their distance in metres, a two-sentence summary, a thumbnail image and a link — perfect for travel guides, maps, augmented-reality and location-aware apps. Or look up a single article to get its coordinates, description, summary and image. Works for every language edition (en.wikipedia, de.wikipedia, fr.wikipedia and 300+ more). Open data from Wikipedia.

api.oanor.com/geowiki-api

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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