Where the data comes from—and where it stops.

Used for: Champions, interim champions when explicitly labelled, and ranks 1–15 across the published UFC divisions and pound-for-pound lists.

Known limit: UFC publishes current state rather than a complete historical feed, so Fights Now history starts with the first locally observed snapshot.

Used for: Official event identity, place, status, named card, bout discipline and explicitly published result fields. Rankings collection is configured separately.

Known limit: The current English rankings page publishes an unavailable notice and no tables. The collector fails safe rather than replacing older snapshots. Collection stores normalized facts and links, not ONE article text, images or video; activation reflects a documented project-owner risk decision, not a legal determination.

Used for: Official tournament events, cards, fighter identities, results and male, female and pound-for-pound ranking publications.

Known limit: Its credential-free public JSON API is used by the official website but is undocumented and may change. Unknown provider codes and malformed rows fail closed.

Used for: Official events, card fragments, fighter profiles and eight ranking divisions, including explicit vacancies and interim champions.

Known limit: Published event times lack a reliable timezone offset, so they are not stored as UTC fight instants. Observation time is used when the ranking page supplies no revision date.

Used for: Dated boxing rankings, explicit title holders and vacancies, and mandatory-challenger details only when the body publishes that designation.

Known limit: Current sources do not provide a complete historical ledger. The present implementation covers official men's publications; a missing date, challenger or title change is never guessed.

Used for: Upcoming event dates, places, headliners, undercard pairings, published records and explicit title labels from official event pages.

Known limit: This is Matchroom promotion coverage, not every worldwide boxing card. Blank opponents are not fabricated, and no winner, start time or broadcast is inferred.

Used for: Upcoming event identity, timezone-qualified starts, places, ordered named bouts and explicit title or division labels.

Known limit: TBA and TBC opponents are skipped. Published source defects are not copied blindly; an unexplained card block causes that page to fail validation.

Used for: The state event list and linked result documents for boxing, MMA, kickboxing, Muay Thai, bare knuckle and amateur variants.

Known limit: Image-only scans and unusual team-boxing tables may not expose every contestant or winner. Individual public licence search is not automated.

Used for: Official event-number schedules plus result documents containing contestants, weights, outcome details, officials and scorecards when published.

Known limit: The schedule itself contains no named matchups or results. Historical result layouts vary and some documents are scans; unreadable documents fail independently.

Used for: Implemented result-document intake for boxing, MMA, kickboxing and Muay Thai.

Known limit: During local validation, the official archive and PDF endpoints returned successful but empty bodies. The source is monitored and fails closed; live ingestion was not claimed as validated.

Used for: Published boxing and MMA event dates, promoters, venues and addresses from the commission listing.

Known limit: Public event pages may not provide full cards or official outcomes, so schedule rows do not create placeholder bouts.

Used for: Five published PFL champions and the men's Media P4P positions 1–5. Combat Registry describes itself as PFL's official media rankings partner.

Known limit: This is not presented as a complete PFL-owned divisional publication. It includes no women's list or numbered divisional contenders, and supplies no publication date.

Used for: Event and competition identities, published participants, records and explicit coarse result fields across a bounded date window.

Known limit: The public endpoint is undocumented. Methods, weight classes and upcoming title status can be missing; ESPN outcomes remain provisional until an authorized official source verifies them.

Used for: Published PFL participants, records, bout divisions and explicit outcome fields from one bounded scoreboard request.

Known limit: The endpoint publishes no rankings or champion state and may omit a completed bout's method. Fights Now therefore labels participants as card-listed, not ranked.

Used for: Five community-maintained ranking divisions plus year-page discovery for GLORY events, cards and published result details.

Known limit: Rankings currently contain only two to four contenders per division, not a top 15. Event facts start pending verification, and tournament stages are retained without modelling a separate bracket graph.