Fight API terms

UFCalendar Fight API — Terms of Service & Acceptable Use Policy
Effective: 20 August 2026 · Last updated: 2 November 2026 · Operator: Mate Bersenadze ("UFCalendar", "we"; full imprint below). Contact: api@ufcalendar.com

At a glance

Every plan (Free, Hobby, Pro and Business) carries the same rights. Plans differ only in how many requests you get and in a few features, never in what you may do with the data. You don't need to ask us for approval, buy a separate commercial licence, or credit us. This summary and the questions below are part of these terms; the numbered sections give the detail.

Common questions

The questions developers ask us most, answered by these terms. If yours isn't here, email api@ufcalendar.com and we'll add it.

Can I use the free plan for a commercial project?

Yes. Every plan, free included, carries the same rights. The free plan is limited by its quota (1,000 requests a month), not by what you build. (§4)

Do Hobby, Pro or Business give me more rights?

No. Paid plans give more requests, more keys and some features (signed webhooks and odds movement history on Pro and Business, email support). What you may do with the data is the same on every plan. (§3, §4)

Do I need a higher plan for historical data?

No. Every plan reads the whole archive, back to UFC 1 in 1993. Only the move-by-move odds history is limited to Pro and Business. (§3)

Can I show the data on a public site or in an app I charge for?

Yes. Showing facts inside your own product, and anything you derived from them, is the main use the API exists for. (§4)

Can I train a model on it and publish or sell the predictions?

Yes. The model, its weights and its outputs are yours, and you may keep using them after you cancel. (§4, §8)

How much can I store, and for how long?

As much as you like, for as long as you like, including earlier and corrected versions of a record. Store it in your own systems and combine it with other sources. (§4)

What happens to my data when I cancel?

Only API access ends. You keep what you fetched and may keep using it as section 4 allows, with no deadline and no duty to delete. (§8)

Can I download everything at once?

There is no bulk export or dump. Backfill through the paginated API within your quota; no separate licence is needed for that. (§4)

My site carries betting content or gambling ads. Is that a problem?

No. Tipping, betting-content, fantasy and prediction sites are fine, and so are gambling ads. You are responsible for the gambling-advertising rules where you publish. (§5, §7)

Can I use it to bet, or to trade on Polymarket or Kalshi?

Yes, as a participant: your own model, your own positions, research you publish for other traders. What you can't do is be the price or settlement source for a sportsbook or market. (§5)

Can I send the data to ChatGPT, Claude or another AI model?

Yes, as input to your own product, including a hosted model API. Selling or licensing the data itself to an AI company is redistribution, and that isn't allowed. (§4, §5)

Can my backend serve the data to my own app and users?

Yes, selected or transformed fields, to your own apps and users. Opening it up as an API that other developers build on is redistribution. (§4, §5)

Do I have to credit UFCalendar?

Not for facts. A "Data: UFCalendar" line is welcome but optional. Fighter images must show the artist and licence the API returns. (§4, §6)

Can I use promotion logos or official fighter photos?

The API serves neither. It only returns Creative Commons and public-domain images from Wikimedia Commons. Promotion names and marks belong to their owners. (§1, §6)

Is this official or licensed league data?

No. It is compiled from public sources and our own systems. We are independent and hold no league licence, so it is not suitable as an official-data feed for licensed sportsbooks. (§1, §5, §7)

Is there an uptime guarantee?

No plan includes a service-level agreement. Breaking changes to /v1 get at least 12 months’ notice. (§7)

1. The service

The UFCalendar Fight API ("the API", api.ufcalendar.com) provides mixed martial arts data — event schedules, fight cards, results, statistics, fighter profiles and career timelines, rankings history, UFCalendar Power Index ratings, model win probabilities, broadcast-rights data, and aggregated consensus betting odds — over HTTPS under the plans published at ufcalendar.com/developers. UFCalendar is an independent publication. We are not affiliated with, endorsed by, or licensed by UFC/Zuffa/TKO, PFL, OKTAGON MMA, or any other promotion; organization names are used nominatively to describe the data. Odds data is an aggregated consensus of publicly offered sportsbook lines, provided as sports information: it is not an offer or invitation to wager, we do not accept or broker wagers, and we are not affiliated with any sportsbook. See section 5.

2. Accounts and keys

API keys are issued to a UFCalendar account and are your responsibility. Keys are shown once at creation and stored only as hashes; treat them as secrets. You may not share, sell, or transfer keys. We may revoke keys that we reasonably believe are compromised or abusive.

3. Plans, billing, refunds

The plans are Free, Hobby, Pro and Business. They differ in monthly requests, requests per minute, the number of keys, support, and the features listed on each plan at ufcalendar.com/developers (for example signed webhooks and odds movement history on Pro and Business). Every plan reads the full historical archive, and every plan carries the same usage rights (section 4).

The free plan costs nothing, needs no card and does not expire: 1,000 requests a month, 10 a minute, one key. Owner-granted trial keys are different: they are for evaluation only, time-boxed, non-commercial and revocable at any time. You may keep what you fetched during a trial for evaluation and audit, but not use it in production.

Paid plans are billed by our merchant of record, Paddle.com Market Ltd ("Paddle"), which handles payment, applicable taxes, invoices, and refunds. Quotas are hard caps per calendar month (UTC); unused requests do not roll over. Plan changes apply per Paddle's proration rules; cancellations take effect at the end of the paid period. We offer a 14-day money-back guarantee on a plan's first purchase — email api@ufcalendar.com. On non-payment, API access is suspended at the end of the paid period.

4. What you may do with the data

On every plan — Free, Hobby, Pro and Business alike — you may use the data in your own products, commercial ones included. That covers:

• displaying it — on websites and apps, in articles, newsletters, social posts and paid communities;
• analysing it — including training your own statistical or machine-learning models and publishing or selling the predictions, probabilities and other outputs they produce;
• using it as input to AI-assisted or automated systems that create original content, including hosted AI model APIs you call as part of your own product;
• running your own product logic on it — for example scoring predictions and pick'em contests, or deciding leagues and awards;
• storing it in your own systems (caches, databases, backups), normalising it, keeping earlier and corrected versions, and combining it with data from other sources;
• serving selected or transformed fields from your own backend to your own apps and users.

There is no limit on how much you store or for how long. Backfilling the historical archive through the paginated API, within your plan's quota, is the intended path; no separate export licence exists or is needed. Factual data needs no attribution — a "Data: UFCalendar" credit is welcome but optional (images are different, see section 6).

The one line is redistribution: making the data itself available to third parties as data — a third-party-facing API, a downloadable dataset or dump, a data feed, or a product whose main value is access to our records — is not permitted on any plan (section 5). Showing facts inside your own product, and outputs you derived from them, is not redistribution.

5. What you may not do

On every plan, you agree NOT to:

• resell, sublicense, or redistribute the raw dataset or substantial portions of it, including by selling or licensing it to others as training data;
• use the API as an official-data feed for regulated sports-betting operations (in-play trading, odds compilation for licensed sportsbooks) — that market requires league-licensed data we do not provide;
• redistribute the odds data as a standalone odds feed, or use any of the data as the price or settlement source for wagers or prediction-market contracts that you or anyone else offers. Betting or trading on your own account, publishing your own analysis, and running a tipping or betting-content site with gambling advertising are allowed;
• circumvent rate limits, quotas, or key checks, or rotate keys/accounts to do so;
• remove attribution from Creative-Commons-licensed fighter images — the license metadata the API returns (artist, license) must be displayed wherever the image is shown (section 6);
• use the data to violate any law or third-party right.

6. Fighter images

Fighter images the API returns are third-party works hosted on Wikimedia Commons under free licenses. We only serve licenses that allow commercial use and modification; non-commercial, no-derivatives and unknown licenses are excluded. Each image is licensed to you by its author under its own license, not by us, and we add no restrictions of our own: you may store originals, crop, recolour, remove backgrounds or otherwise adapt them, and keep using them after your subscription ends, as that license allows. In practice that means showing the credit (artist and license, as returned) wherever the image appears, indicating changes, and sharing adaptations under the same license where it is a ShareAlike license. The metadata we return reproduces the image's Commons file page; we do not independently verify the provenance behind an upload (for example a frame taken from a video), and the Commons file page and its source link remain the authority. The API serves no promotion logos or official promotional photography.

7. Data, accuracy, availability

Sports data is compiled from public sources and our own systems; it is provided "as is", without warranty of accuracy, completeness, or fitness for any purpose. Fight results, statistics, and rankings can change on official review. Model probabilities and Power Index ratings are our own editorial/statistical outputs, not advice of any kind. Odds data is informational only and is not betting advice: it is provided without warranty of accuracy or timeliness, may lag or differ from the prices any sportsbook is currently offering, and does not identify the sportsbooks behind it. You are responsible for complying with the gambling and gambling-advertising laws that apply wherever you display or use it. No plan includes a service-level agreement or uptime guarantee. We may modify or discontinue endpoints with 12 months' notice for breaking changes on /v1 (additive changes may ship any time).

8. Cancelling and keeping your data

You may stop using the API and cancel at any time. We may suspend or terminate access for breach of these terms, effective immediately for violations of section 5, with a pro-rata refund of any unused paid period unless the breach was willful.

When a plan ends — by cancellation, downgrade, non-payment or expiry — API access ends, and nothing else does. Data you obtained while on any plan, the free plan included (trial keys: section 3), is yours to keep and to keep using as described in section 4, without time limit; you have no duty to delete it, and models you trained on it and their outputs remain yours. The redistribution limits in section 5 continue to apply. If we terminate for a breach of section 5, we may require you to stop the use that breached it.

9. Liability

To the maximum extent permitted by law, our aggregate liability arising out of or relating to the API is limited to the amounts you paid for the API in the three months preceding the claim, and we are not liable for indirect, incidental, or consequential damages, lost profits, or lost data.

10. Changes and law

We may update these terms; material changes are announced via the changelog and/or email at least 14 days ahead. Continued use after the effective date is acceptance. These terms are governed by the laws of Georgia; mandatory consumer rights in your country remain unaffected. Paddle's checkout terms apply to the payment relationship.

Operator: Mate Bersenadze, Ana Politkovskaya St 2b, 0186 Tbilisi, Georgia · api@ufcalendar.com