{"slug":"saylorinnovations-com-api-chain-nft-holdings-a4f61d","title":"NFT holdings check on 16 EVM chains","host":"saylorinnovations.com","method":"GET","resource":"https://saylorinnovations.com/api/chain/nft-holdings","category":"market","description":"NFT holdings check on 16 EVM chains: how many tokens a wallet holds in each of up to 10 ERC-721 collections, with collection names and symbols.","price_listed":0.01,"price_asked":0.01,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":291,"reported_calls_30d":1,"reported_payers_30d":1,"networks":["eip155:137","eip155:42161","eip155:8453","solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"method":"GET","queryParams":{"chain":"ethereum","collections":"0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D,0x60E4d786628Fea6478F785A6d7e704777c86a7c6","owner":"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"},"type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"method":{"enum":["GET"],"type":"string"},"queryParams":{"properties":{"chain":{"description":"chain name (ethereum, base, arbitrum, optimism, polygon, bsc, avalanche, gnosis, linea, scroll, mantle, blast, sonic, celo, berachain, unichain) or chain id","type":"string"},"collections":{"description":"comma-separated ERC-721 collection contracts, 1 to 10","type":"string"},"owner":{"description":"the wallet to check","type":"string"}},"required":["chain","owner","collections"],"type":"object"},"type":{"const":"http","type":"string"}},"required":["type","method"],"type":"object"},"output":{"properties":{"example":{"properties":{"chain":{"description":"the chain name that was queried","type":"string"},"chain_id":{"description":"EIP-155 chain id of that network","type":"number"},"collections_checked":{"description":"collections read","type":"number"},"collections_held":{"description":"collections the wallet holds at least one token in","type":"number"},"holdings":{"description":"one entry per collection","items":{"properties":{"balance":{"description":"tokens held","type":["string","null"]},"collection":{"description":"collection contract","type":["string","null"]},"erc721_confirmed":{"description":"true when the contract confirms ERC-721 via ERC-165","type":["boolean","null"]},"holds":{"description":"true when balance is above zero","type":["boolean","null"]},"name":{"description":"collection name","type":["string","null"]},"status":{"description":"holds, none or not_an_erc721_collection_here","type":["string","null"]},"symbol":{"description":"collection symbol","type":["string","null"]}},"type":"object"},"type":["array","null"]},"note":{"description":"plain-language reading of the result","type":"string"},"owner":{"description":"wallet checked","type":"string"},"source":{"description":"where the data was read from or how it was computed","type":"string"},"total_tokens":{"description":"tokens held across the collections","type":"number"}},"required":["chain","chain_id","owner","collections_checked","collections_held","holdings","note","source"],"type":"object"},"type":{"const":"json","type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[{"day":"2026-10-21","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.01,"price_match":true,"latency_ms":291,"error":null}],"description_full":"NFT holdings check on 16 EVM chains: how many tokens a wallet holds in each of up to 10 ERC-721 collections, with collection names and symbols.","last_updated":"2026-10-21T04:11:43.36Z","schemes":["exact"]}