{"uid":"cap_BLwYnKl_kUT-PavAWjCrr","slug":"multichain-rpc-erc-721-nft-metadata-lookup-7d803545","name":"Multichain RPC – ERC-721 NFT Metadata Lookup","description":"Cheap, factual EVM chain lookups priced per call in USDC. Base, Polygon, Arbitrum, Optimism and Ethereum.","url":"https://multichain-rpc.clankerceo.workers.dev/erc721-metadata","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","queryParams"],"properties":{"type":{"enum":["http"],"type":"string"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","properties":{"chain":{"type":"string"},"contract":{"type":"string"},"token_id":{"type":"string"}}}}},"output":{"type":"object","required":["type"],"properties":{"type":{"enum":["json"],"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"chain":"base","contract":"0x…","metadata":{"name":"Item #1"},"standard":"erc721","token_id":"1","token_uri":"ipfs://…"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.004","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":"$0.004/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.004","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.004","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_Nm0S-X6ukYHcktEd6esv4","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.004","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Fetches on-chain ERC-721 NFT metadata (name, token URI, standard) for a given contract address and token ID on EVM chains including Base, Polygon, Arbitrum, Optimism, and Ethereum.","exampleAgentPrompt":"What's the metadata for token ID 1 of the ERC-721 contract 0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D on Ethereum — give me the name, token URI, and any on-chain metadata?","exampleUseCases":[{"title":"NFT display card in a marketplace","prompt":"Pull the metadata for token ID 42 of the contract 0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D on Ethereum so I can show the NFT's name and image in my app."},{"title":"Verify NFT ownership details","prompt":"I need to confirm the token URI and metadata standard for token ID 7 of contract 0x8a90CAb2b38dba80c64b7734e58Ee1dB38B8992e on Base — is it ERC-721?"},{"title":"Resolve IPFS link for NFT attributes","prompt":"Fetch the on-chain metadata for token #100 of contract 0x34d85c9CDeB23FA97cb08333b511ac86E1C4E258 on Polygon so I can resolve the IPFS URI and display the traits."}],"resultDescription":"A JSON object containing the chain name, contract address, token ID, NFT standard (erc721), the raw token URI (e.g. ipfs://…), and the resolved metadata object (including the NFT name and any other on-chain fields).","failureModes":["Invalid or non-existent contract address returns an error or empty metadata","Token ID not minted yet may return a revert or null metadata","Unsupported chain name returns a bad request error","IPFS or HTTP token URI that is unreachable may result in partial metadata","Malformed contract address format causes a query failure","Rate limits or RPC node downtime may cause transient errors"],"whenToPreferThis":"Choose this endpoint when you need cheap, pay-per-call ERC-721 metadata lookups across multiple EVM chains (Base, Polygon, Arbitrum, Optimism, Ethereum) without managing your own RPC infrastructure. It is ideal for AI agents that need factual, on-chain NFT data priced in USDC via x402 micropayments, avoiding subscription overhead for low-volume or bursty queries.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:44:00.015Z","isFirstParty":false}