API · /tournament-api

Tournament Scheduler API

healthy 4,854 Subscribers

Generate tournament schedules — entirely locally. The roundrobin endpoint builds a full round-robin fixture list in which every participant plays every other exactly once, or twice (home and away) with double=true, using the classic circle method: it balances home and away across the rounds and, when there is an odd number of entrants, automatically gives each a bye in turn. The bracket endpoint builds a single-elimination knockout bracket: it rounds the field up to the next power of two, seeds the entrants in standard bracket order so the top seed meets the lowest and the strongest only meet in later rounds, awards the byes to the highest seeds, and lays out every round through the Final with the right names (Quarterfinal, Semifinal, Final). Pass a list of team or player names, or simply a number of participants. Everything is computed locally and deterministically, so it is instant and private. Ideal for sports leagues and apps, esports and gaming ladders, club and school competitions, hackathons and any event that needs fair fixtures. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This generates the schedule; for live scores, results and real-world fixtures use a sports data API.

api.oanor.com/tournament-api
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Machine-readable spec so AI agents can integrate this API.

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

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

Tournament Scheduler API — live data on the oanor API marketplace

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
81 ms
Server probes · 24h
Subscribers
4,854
active
Total calls
57
last 7 days
status Full status page → · 6 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 3,635 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 3,635 calls/month
  • 2 req/sec
  • Round-robin + bracket
  • No credit card
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Starter

€5.15 /month

  • 13,150 calls / month
  • 8 requests / second
  • Hard cap (429 above quota, no overage)
  • 13.15k calls/month
  • 8 req/sec
  • Double round-robin + seeding
  • Email support
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Pro

€25.05 /month

  • 182,500 calls / month
  • 20 requests / second
  • Hard cap (429 above quota, no overage)
  • 182.5k calls/month
  • 20 req/sec
  • League / esports / event pipelines
  • Priority support
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Mega

€63.05 /month

  • 955,000 calls / month
  • 50 requests / second
  • Hard cap (429 above quota, no overage)
  • 955k calls/month
  • 50 req/sec
  • Platform scale
  • Dedicated SLA
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Built by

Related APIs

Other APIs with overlapping tags.

Recurrence Rule API — oanor API marketplace

Recurrence Rule API

Expand and describe RFC 5545 recurrence rules — the RRULE that powers calendar repeats. The expand endpoint takes an RRULE and a start date-time and returns the next occurrence dates, correctly handling FREQ (daily, weekly, monthly, yearly and the finer hourly/minutely/secondly), INTERVAL (every 2 weeks…), COUNT and UNTIL, BYDAY including ordinals like 2MO or -1FR (so "the last Friday of the month" or "the third Sunday of June"), BYMONTHDAY including negatives (-1 for the last day of the month), BYMONTH and WKST. The describe endpoint turns a rule into a plain-English sentence such as "every week on Monday, Wednesday and Friday, 10 times". Everything is computed locally in UTC and deterministically, so it is instant, private and identical on every machine. Ideal for scheduling and booking systems, calendar and reminder apps, billing and subscription cycles, job and report scheduling, and showing customers when something next happens. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 endpoints. This expands the recurrence rule; to build a downloadable .ics calendar event use an iCalendar API, and for plain date arithmetic use a date-time API.

api.oanor.com/rrule-api

iCalendar API — oanor API marketplace

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.

api.oanor.com/ical-api

Public Holidays API — oanor API marketplace

Public Holidays API

Public holidays for 120+ countries — by year, the next upcoming holidays for a country, and the list of supported countries. Each holiday includes the date, English and local name, scope (national/regional) and type. Ideal for HR, scheduling and booking systems.

api.oanor.com/holidays-api

Olympic Medals API — oanor API marketplace

Olympic Medals API

The all-time Olympic medal table as an API — cumulative Summer and Winter Olympic results for every National Olympic Committee. For each country: its NOC code and, split into Summer / Winter / Combined, the number of Games attended and the gold, silver, bronze and total medals won. Look a country up by name or NOC code, rank countries by any medal metric (all-time gold, winter gold, totals and more), or search. A stable sports reference for quiz, media, sports and data-viz apps. Distinct from single-Games results.

api.oanor.com/olympicmedals-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Tournament Scheduler API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Tournament Scheduler API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Tournament Scheduler 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 Tournament Scheduler API cost?
Tournament Scheduler API has a free tier with 100 calls / month. Paid plans start at €5.15 / 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 Tournament Scheduler API GDPR-compliant?
All requests to Tournament Scheduler 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/tournament-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/tournament-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/tournament-api/SOME_PATH");
curl_setopt($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/tournament-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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