{"uid":"cap_lNr55WjsYcqAgWejVnfvw","slug":"erc-1155-token-metadata-uri-lookup-d755f94c","name":"ERC-1155 Token Metadata URI Lookup","description":"Metadata URI for one ERC1155 token id — Genesis402 / UnyKorn Operator Network","url":"https://twin.unykorn.org/erc1155-uri?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"params":{"type":"object","properties":{"chain":{"enum":["ethereum","base","polygon","arbitrum","optimism","bsc","avalanche","gnosis","linea","scroll"],"type":"string"},"tokenId":{"type":"integer","minimum":0},"contract":{"type":"string","pattern":"^0x[0-9a-fA-F]{40}$"}}}}},"responseSchema":{"type":"json","example":{"ok":true,"type":"erc1155-uri","receipt":{"tx_hash":"0x<64hex>","amount_usd":0.003,"receipt_id":"g402-<16hex>"},"generated_at":"<iso8601>"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","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":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_e6c_NdBfEfDtpeEcorSKH","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the metadata URI for a specific ERC-1155 token ID on a given EVM-compatible blockchain contract.","exampleAgentPrompt":"What's the metadata URI for token ID 7 on the ERC-1155 contract 0xd9145CCE52D386f254917e481eB44e9943F39138 on Polygon?","exampleUseCases":[{"title":"NFT marketplace metadata resolution","prompt":"I need the metadata URI for token ID 1024 on ERC-1155 contract 0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D on Ethereum — I want to display the image and attributes in my marketplace."},{"title":"Multi-chain NFT inventory audit","prompt":"Can you fetch the metadata URI for token ID 0 from the ERC-1155 contract 0x3Fe1a4c1481c8351E91B64D5c398b159dE07cbc5 on Base so I can verify it's pointing to the right IPFS asset?"},{"title":"Game asset URI verification","prompt":"Look up the token URI for ERC-1155 token ID 999 at contract 0xAbCd1234AbCd1234AbCd1234AbCd1234AbCd1234 on Arbitrum — I'm building a game inventory and need to confirm the metadata endpoint."}],"resultDescription":"Returns a JSON object with ok:true, the type field set to 'erc1155-uri' (implying the URI string is included), a payment receipt with transaction hash, USD amount, and receipt ID, and a generated_at ISO8601 timestamp. The core result is the metadata URI string associated with the queried token ID on the specified contract and chain.","failureModes":["Invalid contract address format (must be 0x-prefixed 40 hex chars) returns validation error","Unsupported chain name returns enum validation error","Token ID does not exist on contract may return empty or revert-based error","Network connectivity issues to the specified chain RPC may cause timeouts","Payment failure via x402 protocol prevents request from being processed"],"whenToPreferThis":"Use this endpoint when you need to resolve the metadata URI for a specific ERC-1155 token on any of the 10 supported EVM chains without running your own RPC node. It is particularly useful for agents building NFT explorers, game asset managers, or multi-chain dashboards that need on-chain URI data without managing blockchain infrastructure. Prefer this over generic EVM RPC calls when you want a simple, paid, pre-authenticated lookup with a structured response.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T04:00:25.189Z","isFirstParty":false,"canonicalSlug":"erc-1155-token-metadata-uri-lookup-d755f94c"}