{"uid":"cap_VIR-eLM0O4W9yyiJ1FBVp","slug":"nft-floor-wash-trade-detector-48ce4338","name":"NFT Floor Wash Trade Detector","description":"ERC-721 collection activity on Ethereum from Blockscout: name, holder count, supply and the newest 50 transfers, with round-trip transfers (a token sent A to B and straight back to A) flagged as possible wash signals. No sale prices, floor price or royalties: this source does not provide them.","url":"https://api.chainmarket-api.workers.dev/api/crypto/nft-floor-wash-detector?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["address"],"properties":{"address":{"type":"string","description":"ERC-721 contract address on Ethereum, 0x + 40 hex characters"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"name":"BoredApeYachtClub","type":"ERC-721","source":"https://eth.blockscout.com/api/v2/tokens/0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D/transfers","symbol":"BAYC","address":"0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D","checkedAt":"2026-10-23T09:35:54.648Z","transfers":[{"to":"0x28dDa46BdC0aEB3b4E58E6A9A3774875729367a0","from":"0xE445283D46D814aF9AB554D5afb40aFB28b91935","tokenId":"948","timestamp":"2026-10-23T08:49:47.000000Z","transactionHash":"0x078d40f50a0b7927753a9477e15f80ce87056b2f0eb2a84775ad6f330ce5430a"},{"to":"0x28dDa46BdC0aEB3b4E58E6A9A3774875729367a0","from":"0xE445283D46D814aF9AB554D5afb40aFB28b91935","tokenId":"7510","timestamp":"2026-10-23T08:49:23.000000Z","transactionHash":"0x8e142162d32398c2afcee6c35b57c1fd2c8009a3da0acdb1471b1fdb77eed67d"}],"roundTrips":[{"between":["0x29469395eAf6f95920E59F858042f0e28D98a20B","0x1a1660e7d83B3B2e047fb0f26A159F9dd9dCb486"],"newerTx":"0x9f4c3a90e57480839f34e5e0bc1146e9340101e3510976e61450c4e8a7f803a9","olderTx":"0xfbff10b9d94ec07e96729d805df1d84fe4c3084153afe23f3e156988ea699d07","tokenId":"2627"},{"between":["0x1a1660e7d83B3B2e047fb0f26A159F9dd9dCb486","0x29469395eAf6f95920E59F858042f0e28D98a20B"],"newerTx":"0xfbff10b9d94ec07e96729d805df1d84fe4c3084153afe23f3e156988ea699d07","olderTx":"0x2328e2a1ba3cbf80cac682976f5f7c9d186b0ff73f710860ddea6afba24b3277","tokenId":"2627"}],"totalSupply":10000,"holdersCount":8245,"roundTripCount":5,"transfersChecked":50}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_-UleGtRU8e1ZA-Y2PlUMt","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Detects wash trading activity in an ERC-721 NFT collection by analyzing recent transfer round-trips on Ethereum","exampleAgentPrompt":"Can you check if the Bored Ape Yacht Club NFT contract at 0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D has been wash trading — I want to see any round-trip transfers that look suspicious?","exampleUseCases":[{"title":"NFT project due diligence before purchase","prompt":"Before I buy into this NFT project, can you check the contract 0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D for wash trading? I want to know if the floor price might be artificially inflated by round-trip transfers."},{"title":"Flagging suspicious floor price pump","prompt":"This NFT collection's floor shot up overnight — can you run a wash trade check on the contract 0x60E4d786628Fea6478F785A6d7e704777c86a7c6 and tell me how many round-trip transfers you find?"},{"title":"On-chain compliance audit for NFT marketplace","prompt":"I need to audit this ERC-721 contract at 0xb47e3cd837dDF8e4c57F05d70Ab865de6e193BBB for wash trading patterns — pull the recent transfers and flag any addresses doing circular trades back and forth."}],"resultDescription":"Returns the collection name, symbol, contract address, total supply, holders count, a sample of recent transfers with sender/receiver/tokenId/timestamp/txHash, detected round-trip pairs with the wallet addresses involved and transaction hashes, and a total round-trip count — all sourced from Blockscout's Ethereum API.","failureModes":["Invalid or non-ERC-721 contract address returns an error","Contract address with no transfer history returns empty transfers array","Rate limiting or Blockscout upstream unavailability causes timeout","Malformed address (not 0x + 40 hex) rejected at input validation","Payment failure results in no charge and no response"],"whenToPreferThis":"Choose this endpoint when you need on-chain evidence of wash trading in a specific Ethereum ERC-721 NFT collection without signing up for an analytics platform. It's ideal for due diligence before purchasing NFTs, auditing marketplace listings for price manipulation, or compliance checks — particularly when you want raw round-trip transfer data with transaction hashes rather than a derived score from a third-party oracle.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-24T12:45:37.702Z","isFirstParty":false,"canonicalSlug":"nft-floor-wash-trade-detector-48ce4338"}