{
  "v": 1,
  "requestId": "37af018f-cac7-4001-9078-1e9a370bbb29",
  "chainId": 1,
  "window": {
    "toBlock": 26021473,
    "fromBlock": 26021176,
    "toBlockHash": "0x5246be010dc92fb8a4f2ca1ff6733908eeade191cd509c3663b3edbf3da0e403"
  },
  "answerType": "uint256",
  "answer": "876808900000000000",
  "figure": "876808900000000000",
  "definitions": {
    "floor": "the lowest active listing price across the major marketplaces (OpenSea, Blur, and any public aggregator), read as close as possible to the closing block; name the source and the time of the reading",
    "units": "wei, as an integer",
    "collection": "Mutant Ape Yacht Club, contract 0x60e4d786628fea6478f785a6d7e704777c86a7c6 on Ethereum mainnet",
    "denomination": "ETH; 1 ETH = 1000000000000000000 wei. Convert the API decimal exactly, without floating-point rounding or USD conversion.",
    "observationSource": "https://api.opensea.io/api/v2/collections/mutant-ape-yacht-club/stats",
    "observationTimeUtc": "2026-09-20T22:49:04.238090Z",
    "observedField": "total.floor_price = 0.8768089; total.floor_price_symbol = ETH",
    "windowStartTimeUtc": "2026-09-20T20:39:59Z",
    "windowCloseTimeUtc": "2026-09-20T21:39:59Z",
    "selection": "Lowest successfully retrieved ETH floor among OpenSea collection statistics and CoinGecko NFT API observations. Blur could not be read. This does not establish complete marketplace coverage.",
    "priceBasis": "Use the source-reported collection listing floor per NFT, without adding gas or separately estimated fees. Source order validity and marketplace coverage were not independently established.",
    "temporalScope": "The answer is a later marketplace observation, not a computation over the pinned blocks or a verified historical floor. No assumption is made that listings were unchanged since the closing block."
  },
  "recipe": {
    "kind": "panel",
    "source": "https://api.opensea.io/api/v2/collections/mutant-ape-yacht-club/stats"
  },
  "notes": "UNVERIFIED FOR THE PINNED WINDOW; DOES NOT SATISFY RPC-ONLY REPRODUCTION. The request explicitly specifies evidence=panel and an off-chain active-listing floor. The catalogue panel recipe records a source and is not rerun. This conflicts with the assignment requirement for exact-window public-RPC-only reproduction. Standard signed marketplace orders may remain off chain until fulfillment; RPC block data cannot enumerate all active OpenSea and Blur listings. See https://docs.opensea.io/docs/seaport-hooks and https://github.com/ProjectOpenSea/seaport/blob/main/docs/SeaportDocumentation.md. No catalogue chain recipe computes the requested marketplace minimum. Rather than fabricate a historical floor or substitute transfer/sale statistics, this answer records the closest directly observed marketplace floor using the panel recipe. OpenSea total.floor_price was 0.8768089 ETH at 2026-09-20T22:49:04.238090Z (HTTP Date Sun, 20 Sep 2026 22:49:04 GMT), about 69 minutes 5 seconds after the pinned close. Exact decimal conversion: 0.8768089 * 1000000000000000000 = 876808900000000000. CoinGecko https://api.coingecko.com/api/v3/nfts/mutant-ape-yacht-club reported floor_price.native_currency=0.876978 ETH at 2026-09-20T22:48:49.134464Z, with matching Ethereum collection contract; this is higher. Blur https://core-api.prod.blur.io/v1/collections/0x60e4d786628fea6478f785a6d7e704777c86a7c6 returned HTTP 403; api.blur.io failed DNS resolution. OpenSea best-listing endpoint returned HTTP 401, so individual executable listings were not verified. https://rpc.flashbots.net/fast and https://ethereum-rpc.publicnode.com independently returned eth_chainId=0x1, closing block 26021473 with the exact pinned hash and timestamp 0x6ab052af, and opening block 26021176 with timestamp 0x6ab0449f and hash 0x28c68aa0b1f73a9e5549e9a258f0bc430b3408412a2941f06eb5711d41b28893. https://rpc.mevblocker.io/fast returned HTTP 403. Only the window anchors were verified through RPC; no on-chain floor computation is claimed. Repeating the panel URL later may return a different value. A timestamped historical marketplace orderbook snapshot and an approved off-chain evidence method would be needed to establish the requested historical minimum."
}