{
  "dataset": "Polymarket Gamma API endDate sample: 23 markets, 24 September 2026",
  "article": "https://orcalayer.com/blog/polymarket-api-enddate",
  "source": "https://gamma-api.polymarket.com/markets/{id}, one request per market, top-level endDate of each market",
  "fetched_on": "2026-09-24",
  "fields": {
    "id": "Gamma API market id",
    "type": "market type as grouped in the article",
    "question": "market question",
    "closed": "closed flag from the API at fetch time",
    "endDate": "top-level endDate as returned",
    "start_gameStartTime_or_eventStartTime": "gameStartTime, or eventStartTime where there is no gameStartTime; null when the market has neither",
    "closedTime": "closedTime as returned; null while open",
    "umaEndDate": "umaEndDate as returned; null while open",
    "rules_quote": "the sentence of the market description that states the deadline",
    "rules_deadline_utc": "that deadline converted to UTC with daylight saving applied; null where the rules give none",
    "rules_deadline_note": "how the conversion was made, or why there is none",
    "a_end_minus_start_h": "endDate minus start, hours",
    "b_rule_minus_end_h": "rules deadline minus endDate, hours; null where there is no deadline",
    "c_closed_minus_end_h": "closedTime minus endDate, hours; negative = closed before endDate; null while open",
    "classification": "how endDate relates to the rules on this market",
    "fetched_at_utc": "when the fresh response was fetched (estimate)",
    "source_url": "the request",
    "extra_note": "present only where something else was observed",
    "previous_snapshot": "present on the two markets whose endDate differed in an older cached response"
  },
  "markets": [
    {
      "id": "4794156",
      "type": "esports",
      "question": "Counter-Strike: QUAZAR vs Misa Esports (BO3) - European Pro League Series 9 Playoffs",
      "closed": true,
      "endDate": "2026-09-23T14:00:00Z",
      "start_gameStartTime_or_eventStartTime": "2026-09-23T08:00:00Z",
      "closedTime": "2026-09-23 13:41:14+00",
      "umaEndDate": "2026-09-23T13:41:14Z",
      "rules_quote": "If the match is postponed, it must be rescheduled to a start time on or before October 7, 2026 at 11:59 PM ET (14 calendar days after the originally scheduled start of September 23, 2026 at 4:00 AM ET).",
      "rules_deadline_utc": "2026-10-08T03:59:00Z",
      "rules_deadline_note": "EDT, UTC-4",
      "a_end_minus_start_h": 6.0,
      "b_rule_minus_end_h": 349.983,
      "c_closed_minus_end_h": -0.313,
      "classification": "event estimate; the rules deadline is later",
      "fetched_at_utc": "~2026-09-24T16:20-16:35Z (estimate: the fetch tool does not return the request time; the responses' updatedAt values were the reference)",
      "source_url": "https://gamma-api.polymarket.com/markets/4794156?x=1"
    },
    {
      "id": "4906795",
      "type": "esports",
      "question": "Counter-Strike: Eternal Fire vs ASTRAL (BO3) - Stake Pulse Beat II Group D",
      "closed": true,
      "endDate": "2026-09-24T19:40:00Z",
      "start_gameStartTime_or_eventStartTime": "2026-09-24T13:40:00Z",
      "closedTime": "2026-09-24 16:21:48+00",
      "umaEndDate": "2026-09-24T16:21:48Z",
      "rules_quote": "If the match is postponed, it must be rescheduled to a start time on or before October 8, 2026 at 11:59 PM ET (14 calendar days after the originally scheduled start of September 24, 2026 at 9:40 AM ET).",
      "rules_deadline_utc": "2026-10-09T03:59:00Z",
      "rules_deadline_note": "EDT, UTC-4",
      "a_end_minus_start_h": 6.0,
      "b_rule_minus_end_h": 344.317,
      "c_closed_minus_end_h": -3.303,
      "classification": "event estimate; the rules deadline is later",
      "fetched_at_utc": "~2026-09-24T16:20-16:35Z (estimate: the fetch tool does not return the request time; the responses' updatedAt values were the reference)",
      "source_url": "https://gamma-api.polymarket.com/markets/4906795"
    },
    {
      "id": "4517834",
      "type": "esports",
      "question": "LoL: LYON vs Cloud9 - Game 1 Winner",
      "closed": true,
      "endDate": "2026-09-20T02:00:00Z",
      "start_gameStartTime_or_eventStartTime": "2026-09-19T20:00:00Z",
      "closedTime": "2026-09-19 23:38:00+00",
      "umaEndDate": "2026-09-19T23:38:00Z",
      "rules_quote": "If the match is postponed, it must be rescheduled to a start time on or before October 3, 2026 at 11:59 PM ET (14 calendar days after the originally scheduled start of September 19, 2026 at 4:00 PM ET).",
      "rules_deadline_utc": "2026-10-04T03:59:00Z",
      "rules_deadline_note": "EDT, UTC-4",
      "a_end_minus_start_h": 6.0,
      "b_rule_minus_end_h": 337.983,
      "c_closed_minus_end_h": -2.367,
      "classification": "event estimate; the rules deadline is later",
      "fetched_at_utc": "~2026-09-24T16:20-16:35Z (estimate: the fetch tool does not return the request time; the responses' updatedAt values were the reference)",
      "source_url": "https://gamma-api.polymarket.com/markets/4517834"
    },
    {
      "id": "4894747",
      "type": "esports",
      "question": "Dota 2: Two Move vs Team Lynx (BO3) - European Pro League Playoffs",
      "closed": true,
      "endDate": "2026-09-24T18:00:00Z",
      "start_gameStartTime_or_eventStartTime": "2026-09-24T12:00:00Z",
      "closedTime": "2026-09-24 16:06:47+00",
      "umaEndDate": "2026-09-24T16:06:47Z",
      "rules_quote": "If the match is postponed, it must be rescheduled to a start time on or before October 8, 2026 at 11:59 PM ET (14 calendar days after the originally scheduled start of September 24, 2026 at 8:00 AM ET).",
      "rules_deadline_utc": "2026-10-09T03:59:00Z",
      "rules_deadline_note": "EDT, UTC-4",
      "a_end_minus_start_h": 6.0,
      "b_rule_minus_end_h": 345.983,
      "c_closed_minus_end_h": -1.887,
      "classification": "event estimate; the rules deadline is later",
      "fetched_at_utc": "~2026-09-24T16:20-16:35Z (estimate: the fetch tool does not return the request time; the responses' updatedAt values were the reference)",
      "source_url": "https://gamma-api.polymarket.com/markets/4894747?cb=1"
    },
    {
      "id": "4788143",
      "type": "tennis",
      "question": "Hangzhou Open: Valentin Royer vs Adam Walton",
      "closed": true,
      "endDate": "2026-09-30T02:00:00Z",
      "start_gameStartTime_or_eventStartTime": "2026-09-23T11:30:00Z",
      "closedTime": "2026-09-23 13:39:14+00",
      "umaEndDate": "2026-09-23T13:39:14Z",
      "rules_quote": "If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by October 6, 2026, 11:59 PM ET (14 days after the scheduled start), this market will resolve to 50-50.",
      "rules_deadline_utc": "2026-10-07T03:59:00Z",
      "rules_deadline_note": "EDT UTC-4; originally scheduled September 22, 2026 at 10:00PM ET = 2026-09-23T02:00Z",
      "a_end_minus_start_h": 158.5,
      "b_rule_minus_end_h": 169.983,
      "c_closed_minus_end_h": -156.346,
      "classification": "event estimate; the rules deadline is later",
      "fetched_at_utc": "~2026-09-24T16:20-16:35Z (estimate: the fetch tool does not return the request time; the responses' updatedAt values were the reference)",
      "source_url": "https://gamma-api.polymarket.com/markets/4788143?x=1",
      "extra_note": "endDate = ORIGINAL start (2026-09-23T02:00Z) + exactly 7 days; gameStartTime moved to 11:30Z"
    },
    {
      "id": "4322646",
      "type": "tennis",
      "question": "US Open ATP: Ben Shelton vs Carlos Alcaraz",
      "closed": true,
      "endDate": "2026-09-15T15:30:00Z",
      "start_gameStartTime_or_eventStartTime": "2026-09-09T03:00:00Z",
      "closedTime": "2026-09-09 08:04:13+00",
      "umaEndDate": "2026-09-09T08:04:13Z",
      "rules_quote": "If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 22, 2026, 11:59 PM ET (14 days after the scheduled start), this market will resolve to 50-50.",
      "rules_deadline_utc": "2026-09-23T03:59:00Z",
      "rules_deadline_note": "EDT UTC-4; originally scheduled September 8, 2026 at 11:30AM ET = 2026-09-08T15:30Z",
      "a_end_minus_start_h": 156.5,
      "b_rule_minus_end_h": 180.483,
      "c_closed_minus_end_h": -151.43,
      "classification": "event estimate; the rules deadline is later",
      "fetched_at_utc": "~2026-09-24T16:20-16:35Z (estimate: the fetch tool does not return the request time; the responses' updatedAt values were the reference)",
      "source_url": "https://gamma-api.polymarket.com/markets/4322646?cb=20260924a",
      "extra_note": "endDate = ORIGINAL start (2026-09-08T15:30Z) + exactly 7 days; gameStartTime moved to 2026-09-09T03:00Z. The first request without a cache-busting parameter returned a stale snapshot (closed=false, updatedAt 2026-09-09T04:04Z); endDate was the same in both"
    },
    {
      "id": "4889965",
      "type": "tennis",
      "question": "M25 Falun: Samir Banerjee vs Oskar Brostrom Poulsen",
      "closed": true,
      "endDate": "2026-10-01T12:00:00Z",
      "start_gameStartTime_or_eventStartTime": "2026-09-24T12:00:00Z",
      "closedTime": "2026-09-24 16:24:48+00",
      "umaEndDate": "2026-09-24T16:24:48Z",
      "rules_quote": "If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by October 8, 2026, 11:59 PM ET (14 days after the scheduled start), this market will resolve to 50-50.",
      "rules_deadline_utc": "2026-10-09T03:59:00Z",
      "rules_deadline_note": "EDT, UTC-4",
      "a_end_minus_start_h": 168.0,
      "b_rule_minus_end_h": 183.983,
      "c_closed_minus_end_h": -163.587,
      "classification": "event estimate; the rules deadline is later",
      "fetched_at_utc": "~2026-09-24T16:20-16:35Z (estimate: the fetch tool does not return the request time; the responses' updatedAt values were the reference)",
      "source_url": "https://gamma-api.polymarket.com/markets/4889965?cb=1",
      "extra_note": "endDate = start + exactly 7 days"
    },
    {
      "id": "4889874",
      "type": "tennis",
      "question": "M25 Pardubice: Sebastian Dominko vs Marko Bekeni",
      "closed": true,
      "endDate": "2026-10-01T07:30:00Z",
      "start_gameStartTime_or_eventStartTime": "2026-09-24T07:30:00Z",
      "closedTime": "2026-09-24 16:22:48+00",
      "umaEndDate": "2026-09-24T16:22:48Z",
      "rules_quote": "If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by October 8, 2026, 11:59 PM ET (14 days after the scheduled start), this market will resolve to 50-50.",
      "rules_deadline_utc": "2026-10-09T03:59:00Z",
      "rules_deadline_note": "EDT, UTC-4",
      "a_end_minus_start_h": 168.0,
      "b_rule_minus_end_h": 188.483,
      "c_closed_minus_end_h": -159.12,
      "classification": "event estimate; the rules deadline is later",
      "fetched_at_utc": "~2026-09-24T16:20-16:35Z (estimate: the fetch tool does not return the request time; the responses' updatedAt values were the reference)",
      "source_url": "https://gamma-api.polymarket.com/markets/4889874?cb=1",
      "extra_note": "endDate = start + exactly 7 days"
    },
    {
      "id": "4350072",
      "type": "sport_match",
      "question": "SMU vs. Louisville (college football)",
      "closed": true,
      "endDate": "2026-09-19T19:30:00Z",
      "start_gameStartTime_or_eventStartTime": "2026-09-19T19:30:00Z",
      "closedTime": "2026-09-20 00:08:40+00",
      "umaEndDate": "2026-09-20T00:08:40Z",
      "rules_quote": "If the game is postponed, this market will remain open until the game has been completed.",
      "rules_deadline_utc": null,
      "rules_deadline_note": "no fixed deadline in the rules",
      "a_end_minus_start_h": 0.0,
      "b_rule_minus_end_h": null,
      "c_closed_minus_end_h": 4.644,
      "classification": "other: no deadline in the rules; endDate = kickoff; closed 4.6 h AFTER endDate",
      "fetched_at_utc": "~2026-09-24T16:20-16:35Z (estimate: the fetch tool does not return the request time; the responses' updatedAt values were the reference)",
      "source_url": "https://gamma-api.polymarket.com/markets/4350072"
    },
    {
      "id": "3379516",
      "type": "sport_match",
      "question": "Philadelphia Phillies vs. St. Louis Cardinals (MLB)",
      "closed": true,
      "endDate": "2026-08-19T18:15:00Z",
      "start_gameStartTime_or_eventStartTime": "2026-08-12T18:15:00Z",
      "closedTime": "2026-08-12 21:01:30+00",
      "umaEndDate": "2026-08-12T21:01:30Z",
      "rules_quote": "If the game is postponed, this market will remain open until the game has been completed.",
      "rules_deadline_utc": null,
      "rules_deadline_note": "no fixed deadline in the rules",
      "a_end_minus_start_h": 168.0,
      "b_rule_minus_end_h": null,
      "c_closed_minus_end_h": -165.225,
      "classification": "other: no deadline in the rules; endDate = start + exactly 7 days",
      "fetched_at_utc": "~2026-09-24T16:20-16:35Z (estimate: the fetch tool does not return the request time; the responses' updatedAt values were the reference)",
      "source_url": "https://gamma-api.polymarket.com/markets/3379516"
    },
    {
      "id": "3335127",
      "type": "sport_match",
      "question": "Broncos vs. Chiefs (NFL)",
      "closed": true,
      "endDate": "2026-09-15T00:15:00Z",
      "start_gameStartTime_or_eventStartTime": "2026-09-15T00:15:00Z",
      "closedTime": "2026-09-15 03:32:45+00",
      "umaEndDate": "2026-09-15T03:32:45Z",
      "rules_quote": "If the game is postponed, this market will remain open until the game has been completed.",
      "rules_deadline_utc": null,
      "rules_deadline_note": "no fixed deadline in the rules",
      "a_end_minus_start_h": 0.0,
      "b_rule_minus_end_h": null,
      "c_closed_minus_end_h": 3.296,
      "classification": "other: no deadline in the rules; endDate = kickoff; closed 3.3 h AFTER endDate",
      "fetched_at_utc": "~2026-09-24T16:20-16:35Z (estimate: the fetch tool does not return the request time; the responses' updatedAt values were the reference)",
      "source_url": "https://gamma-api.polymarket.com/markets/3335127"
    },
    {
      "id": "4208332",
      "type": "sport_match",
      "question": "Will Real Betis Balompié win on 2026-09-17? (La Liga)",
      "closed": true,
      "endDate": "2026-09-17T17:00:00Z",
      "start_gameStartTime_or_eventStartTime": "2026-09-17T17:00:00Z",
      "closedTime": "2026-09-17 19:17:12+00",
      "umaEndDate": "2026-09-17T19:17:12Z",
      "rules_quote": "If the game is postponed, this market will remain open until the game has been completed.",
      "rules_deadline_utc": null,
      "rules_deadline_note": "no fixed deadline in the rules",
      "a_end_minus_start_h": 0.0,
      "b_rule_minus_end_h": null,
      "c_closed_minus_end_h": 2.287,
      "classification": "other: no deadline in the rules; endDate = kickoff; closed 2.3 h AFTER endDate",
      "fetched_at_utc": "~2026-09-24T16:20-16:35Z (estimate: the fetch tool does not return the request time; the responses' updatedAt values were the reference)",
      "source_url": "https://gamma-api.polymarket.com/markets/4208332"
    },
    {
      "id": "3586918",
      "type": "sport_match",
      "question": "Will Universitatea Craiova CS vs. FC Voluntari end in a draw? (Romania Liga 1)",
      "closed": true,
      "endDate": "2026-08-23T15:30:00Z",
      "start_gameStartTime_or_eventStartTime": "2026-08-23T15:30:00Z",
      "closedTime": "2026-08-23 20:26:43+00",
      "umaEndDate": "2026-08-23T20:26:43Z",
      "rules_quote": "If the game is postponed, this market will remain open until the game has been completed.",
      "rules_deadline_utc": null,
      "rules_deadline_note": "no fixed deadline in the rules",
      "a_end_minus_start_h": 0.0,
      "b_rule_minus_end_h": null,
      "c_closed_minus_end_h": 4.945,
      "classification": "other: no deadline in the rules; endDate = kickoff; closed 4.9 h AFTER endDate",
      "fetched_at_utc": "~2026-09-24T16:20-16:35Z (estimate: the fetch tool does not return the request time; the responses' updatedAt values were the reference)",
      "source_url": "https://gamma-api.polymarket.com/markets/3586918"
    },
    {
      "id": "2772194",
      "type": "sport_future",
      "question": "Will Shakhtar Donetsk win the 2026-27 UEFA Champions League Championship?",
      "closed": false,
      "endDate": "2027-05-30T23:59:00Z",
      "start_gameStartTime_or_eventStartTime": null,
      "closedTime": null,
      "umaEndDate": null,
      "rules_quote": "If the 2026-27 UEFA Champions League season is cancelled, postponed after June 19, 2027, 11:59 PM ET or there is otherwise no winner declared within that timeframe, this market will resolve to \"Other\".",
      "rules_deadline_utc": "2027-06-20T03:59:00Z",
      "rules_deadline_note": "EDT, UTC-4",
      "a_end_minus_start_h": null,
      "b_rule_minus_end_h": 484.0,
      "c_closed_minus_end_h": null,
      "classification": "event estimate; the rules deadline is later",
      "fetched_at_utc": "~2026-09-24T16:20-16:35Z (estimate: the fetch tool does not return the request time; the responses' updatedAt values were the reference)",
      "source_url": "https://gamma-api.polymarket.com/markets/2772194?x=1"
    },
    {
      "id": "1235547",
      "type": "sport_future",
      "question": "Will the New York Yankees win the 2026 World Series?",
      "closed": false,
      "endDate": "2026-10-31T23:55:00Z",
      "start_gameStartTime_or_eventStartTime": null,
      "closedTime": null,
      "umaEndDate": null,
      "rules_quote": "If the 2026 MLB season is cancelled, postponed after December 31, 2026 ET, or there is otherwise no winner declared within that timeframe, this market will resolve to \"Other\".",
      "rules_deadline_utc": null,
      "rules_deadline_note": "interpretation, not data: the rules say only \"postponed after December 31, 2026 ET\" with no clock time; the end of that day in ET (EST, UTC-5) would be 2027-01-01T04:59:00Z",
      "a_end_minus_start_h": null,
      "b_rule_minus_end_h": null,
      "c_closed_minus_end_h": null,
      "classification": "event estimate; the rules deadline is later (the rules give a date but no clock time; see rules_deadline_note)",
      "fetched_at_utc": "~2026-09-24T16:20-16:35Z (estimate: the fetch tool does not return the request time; the responses' updatedAt values were the reference)",
      "source_url": "https://gamma-api.polymarket.com/markets/1235547?cb=1"
    },
    {
      "id": "2243297",
      "type": "sport_future",
      "question": "Will Boston Celtics win the 2027 NBA Finals?",
      "closed": false,
      "endDate": "2027-07-01T03:59:00Z",
      "start_gameStartTime_or_eventStartTime": null,
      "closedTime": null,
      "umaEndDate": null,
      "rules_quote": "If this event is cancelled, postponed after June 30, 2027, 11:59 PM ET, or a champion has not been declared within this timeframe, this market will resolve to \"Other\".",
      "rules_deadline_utc": "2027-07-01T03:59:00Z",
      "rules_deadline_note": "EDT, UTC-4",
      "a_end_minus_start_h": null,
      "b_rule_minus_end_h": 0.0,
      "c_closed_minus_end_h": null,
      "classification": "matches the rules",
      "fetched_at_utc": "~2026-09-24T16:20-16:35Z (estimate: the fetch tool does not return the request time; the responses' updatedAt values were the reference)",
      "source_url": "https://gamma-api.polymarket.com/markets/2243297?cb=1"
    },
    {
      "id": "2034729",
      "type": "politics",
      "question": "Will the US confirm that aliens exist by September 30?",
      "closed": false,
      "endDate": "2027-01-01T04:59:00Z",
      "start_gameStartTime_or_eventStartTime": null,
      "closedTime": null,
      "umaEndDate": null,
      "rules_quote": "...definitively states that extraterrestrial life or technology exists by September 30, 2026, 11:59 PM ET. Otherwise, this market will resolve to \"No\".",
      "rules_deadline_utc": "2026-10-01T03:59:00Z",
      "rules_deadline_note": "EDT, UTC-4",
      "a_end_minus_start_h": null,
      "b_rule_minus_end_h": -2209.0,
      "c_closed_minus_end_h": null,
      "classification": "other: endDate about 92 days LATER than the rules deadline (probably the group or series date, not this market's; hypothesis)",
      "fetched_at_utc": "~2026-09-24T16:20-16:35Z (estimate: the fetch tool does not return the request time; the responses' updatedAt values were the reference)",
      "source_url": "https://gamma-api.polymarket.com/markets/2034729?x=1",
      "previous_snapshot": {
        "updatedAt": "2026-09-21T14:25:59.944641Z",
        "endDate": "2026-10-01T03:59:00Z",
        "source": "cached Gamma API response",
        "note": "returned on 24 September 2026 by a request without a cache-busting parameter; independently reproduced by the fact-checker"
      }
    },
    {
      "id": "1130012",
      "type": "politics",
      "question": "Will United Russia (ER) gain the most seats in the next Russian parliamentary election?",
      "closed": true,
      "endDate": "2026-09-30T00:00:00Z",
      "start_gameStartTime_or_eventStartTime": null,
      "closedTime": "2026-09-21 12:43:47+00",
      "umaEndDate": "2026-09-21T12:43:47Z",
      "rules_quote": "If the results are not known definitively by September 30, 2027, 11:59 PM ET, this market will resolve to \"Other\".",
      "rules_deadline_utc": "2027-10-01T03:59:00Z",
      "rules_deadline_note": "EDT, UTC-4",
      "a_end_minus_start_h": null,
      "b_rule_minus_end_h": 8787.983,
      "c_closed_minus_end_h": -203.27,
      "classification": "rounded (00:00Z) and an event estimate; the rules deadline is about 366 days later",
      "fetched_at_utc": "~2026-09-24T16:20-16:35Z (estimate: the fetch tool does not return the request time; the responses' updatedAt values were the reference)",
      "source_url": "https://gamma-api.polymarket.com/markets/1130012"
    },
    {
      "id": "1163699",
      "type": "politics",
      "question": "Clarity Act (H.R.3633) signed into law in 2026?",
      "closed": false,
      "endDate": "2027-01-01T05:00:00Z",
      "start_gameStartTime_or_eventStartTime": null,
      "closedTime": null,
      "umaEndDate": null,
      "rules_quote": "This market will resolve to \"Yes\" if the Digital Asset Market Clarity Act of 2025 (H.R.3633) is passed by both chambers of the U.S. Congress and signed into law by December 31, 2026, 11:59 PM ET.",
      "rules_deadline_utc": "2027-01-01T04:59:00Z",
      "rules_deadline_note": "EST, UTC-5",
      "a_end_minus_start_h": null,
      "b_rule_minus_end_h": -0.017,
      "c_closed_minus_end_h": null,
      "classification": "matches the rules (1 minute off, rounded to the hour)",
      "fetched_at_utc": "~2026-09-24T16:20-16:35Z (estimate: the fetch tool does not return the request time; the responses' updatedAt values were the reference)",
      "source_url": "https://gamma-api.polymarket.com/markets/1163699?cb=1"
    },
    {
      "id": "1301184",
      "type": "finance",
      "question": "Will Anthropic or OpenAI IPO first?",
      "closed": false,
      "endDate": "2028-01-01T04:59:00Z",
      "start_gameStartTime_or_eventStartTime": null,
      "closedTime": null,
      "umaEndDate": null,
      "rules_quote": "This market will resolve 50-50 if: - Neither company completes an Initial Public Offering (IPO) by December 31, 2027, 11:59 PM ET;",
      "rules_deadline_utc": "2028-01-01T04:59:00Z",
      "rules_deadline_note": "EST, UTC-5",
      "a_end_minus_start_h": null,
      "b_rule_minus_end_h": 0.0,
      "c_closed_minus_end_h": null,
      "classification": "matches the rules",
      "fetched_at_utc": "~2026-09-24T16:20-16:35Z (estimate: the fetch tool does not return the request time; the responses' updatedAt values were the reference)",
      "source_url": "https://gamma-api.polymarket.com/markets/1301184?x=1",
      "previous_snapshot": {
        "updatedAt": "2026-08-08T15:37:37.353283Z",
        "endDate": "2027-12-31T00:00:00Z",
        "source": "cached Gamma API response",
        "note": "returned on 24 September 2026 by a request without a cache-busting parameter; independently reproduced by the fact-checker"
      }
    },
    {
      "id": "4441310",
      "type": "finance",
      "question": "Will the price of Bitcoin be above $76,000 on September 17?",
      "closed": true,
      "endDate": "2026-09-17T16:00:00Z",
      "start_gameStartTime_or_eventStartTime": null,
      "closedTime": "2026-09-17 16:13:42+00",
      "umaEndDate": "2026-09-17T16:13:42Z",
      "rules_quote": "This market will resolve to \"Yes\" if the Binance 1 minute candle for BTC/USDT 12:00 in the ET timezone (noon) on the date specified in the title has a final \"Close\" price higher than the price specified in the title.",
      "rules_deadline_utc": "2026-09-17T16:00:00Z",
      "rules_deadline_note": "EDT, UTC-4; observation moment (open of the 12:00 ET candle); the candle closes at 16:01Z",
      "a_end_minus_start_h": null,
      "b_rule_minus_end_h": 0.0,
      "c_closed_minus_end_h": 0.228,
      "classification": "matches the rules; closed 13.7 min AFTER endDate",
      "fetched_at_utc": "~2026-09-24T16:20-16:35Z (estimate: the fetch tool does not return the request time; the responses' updatedAt values were the reference)",
      "source_url": "https://gamma-api.polymarket.com/markets/4441310?cb=1"
    },
    {
      "id": "4052417",
      "type": "finance",
      "question": "Will Bitcoin reach $90,000 in September?",
      "closed": false,
      "endDate": "2026-10-01T04:00:00Z",
      "start_gameStartTime_or_eventStartTime": null,
      "closedTime": null,
      "umaEndDate": null,
      "rules_quote": "...if any Binance 1 minute candle for BTC/USDT during the month specified in the title (from 00:00 AM ET on the first day to 11:59 PM ET on the last), has a final High price equal to or greater than the price specified in the title.",
      "rules_deadline_utc": "2026-10-01T03:59:00Z",
      "rules_deadline_note": "EDT, UTC-4; the last 23:59 ET candle closes exactly at 04:00Z",
      "a_end_minus_start_h": null,
      "b_rule_minus_end_h": -0.017,
      "c_closed_minus_end_h": null,
      "classification": "matches the rules (1 minute off, rounded to the hour)",
      "fetched_at_utc": "~2026-09-24T16:20-16:35Z (estimate: the fetch tool does not return the request time; the responses' updatedAt values were the reference)",
      "source_url": "https://gamma-api.polymarket.com/markets/4052417?cb=1"
    },
    {
      "id": "2252244",
      "type": "finance",
      "question": "Will there be no change in Fed interest rates after the September 2026 meeting?",
      "closed": true,
      "endDate": "2026-09-16T00:00:00Z",
      "start_gameStartTime_or_eventStartTime": null,
      "closedTime": "2026-09-16 20:02:43+00",
      "umaEndDate": "2026-09-16T20:02:43Z",
      "rules_quote": "The resolution source for this market is the FOMC's statement after its meeting scheduled for September 15-16, 2026 ... If no statement is released by the end date of the next scheduled meeting, this market will resolve to the \"No change\" bracket.",
      "rules_deadline_utc": null,
      "rules_deadline_note": "no fixed time; the deadline is tied to the date of the next meeting, which the text does not state",
      "a_end_minus_start_h": null,
      "b_rule_minus_end_h": null,
      "c_closed_minus_end_h": 20.045,
      "classification": "rounded to 00:00Z of the decision day (Sep 15, 8:00 PM ET, BEFORE the announcement); closed 20 h AFTER endDate",
      "fetched_at_utc": "~2026-09-24T16:20-16:35Z (estimate: the fetch tool does not return the request time; the responses' updatedAt values were the reference)",
      "source_url": "https://gamma-api.polymarket.com/markets/2252244?cb=1"
    }
  ]
}