{"uid":"cap_-vYCjz36rKdeJHDGJ4nrt","slug":"ethereum-erc-721-token-ids-by-owner-e9e98ed2","name":"Ethereum ERC-721 Token IDs by Owner","description":"","url":"https://api.arysphere.com/v1/ventures/x402_eth_reads_v1/eth_mainnet_erc721_tokens_of?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{"owner":{"type":"string","pattern":"^0x[0-9a-fA-F]{40}$","description":"0x + 40 hex"},"token":{"type":"string","pattern":"^0x[0-9a-fA-F]{40}$","description":"ERC-721 contract (Enumerable), 0x + 40 hex"}}}},"additionalProperties":false}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.008","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":"$0.008/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.008","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.008","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_r-nfKtblxWZvD6Q9on3tM","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.008","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns all ERC-721 NFT token IDs held by a given address in a specified ERC-721 collection on Ethereum mainnet, read from the latest chain state.","exampleAgentPrompt":"Can you list all the NFT token IDs that wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 holds in the Bored Ape Yacht Club contract 0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D on Ethereum mainnet?","exampleUseCases":[{"title":"Portfolio audit for NFT collector","prompt":"Show me all the token IDs that wallet 0xAb5801a7D398351b8bE11C439e05C5B3259aeC9B holds in the CryptoPunks contract 0xb47e3cd837dDF8e4c57F05d70Ab865de6e193BBB on Ethereum mainnet."},{"title":"Verify NFT ownership before gating access","prompt":"Does wallet 0x1234567890abcdef1234567890abcdef12345678 own any tokens in the Azuki ERC-721 contract 0xED5AF388653567Af2F388E6224dC7C4b3241C544 on Ethereum mainnet? Pull the token IDs it holds."},{"title":"Track NFT transfers for a monitored wallet","prompt":"Check which token IDs from the CloneX collection at contract 0x49cF6f5d44E70224e2E23fDcdd2C053F30aDA28b are currently owned by address 0xDeadBeef00000000000000000000000000000001 on Ethereum mainnet right now."}],"resultDescription":"A list of ERC-721 token IDs currently held by the specified owner address within the given ERC-721 contract on Ethereum mainnet, read from the latest block. The response reflects the current on-chain state via the contract's Enumerable extension.","failureModes":["Invalid owner address format (must be 0x + 40 hex chars) — request rejected","Invalid contract address format — request rejected","Contract does not implement ERC-721 Enumerable — enumeration may fail or return empty","Address holds no tokens in the collection — returns empty list","Ethereum node latency or RPC unavailability — timeout or error response","Payment not settled via x402 — access denied"],"whenToPreferThis":"Use this endpoint when you need to enumerate all token IDs an address owns within a specific ERC-721 collection on Ethereum mainnet, especially when the contract implements the ERC-721 Enumerable extension. Prefer this over general NFT indexers when you need authoritative, on-chain state at the latest block rather than potentially lagged indexed data. It is well-suited for ownership verification, portfolio snapshots, and gating logic tied to specific collections.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-29T00:33:15.457Z","isFirstParty":false,"canonicalSlug":"ethereum-erc-721-token-ids-by-owner-e9e98ed2"}