{"uid":"cap_j8XmgjsIaM3-NMrmr1FrU","slug":"synapse-api-zksync-nft-metadata-lookup-f1fa0aa3","name":"Synapse API — zkSync NFT Metadata Lookup","description":"High-speed API suite for AI processing, web scraping, and smart data utilities across 57+ blockchain networks. Pay-per-call via x402.","url":"https://synapse-api-brown.vercel.app/api/zksync/nft/metadata?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"tokenId":{"type":"string"},"contractAddress":{"type":"string"}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_w4eZIHDOE5mJimbVWOybi","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Fetches NFT metadata (name, image, attributes, etc.) for a given token ID and contract address on the zkSync blockchain network.","exampleAgentPrompt":"Can you pull up the metadata for token ID 1337 from the NFT contract 0xAbCd1234... on zkSync — I want to see its name, image, and any traits it has.","exampleUseCases":[{"title":"Verify NFT traits before purchase","prompt":"Before I buy this NFT, can you fetch its metadata from contract 0xDEADBEEF00000000000000000000000000000001, token ID 88 on zkSync, so I can see its rarity attributes and image?"},{"title":"Display NFT in gallery app","prompt":"I need to show the name, description, and image for token ID 5 from the zkSync NFT contract 0xABCDABCDABCDABCDABCDABCDABCDABCDABCDABCD — can you grab the full metadata?"},{"title":"Audit collection attributes","prompt":"I'm building a rarity tool for a zkSync NFT collection. Can you retrieve the metadata for token ID 200 at contract address 0x1111222233334444555566667777888899990000 so I can check its traits?"}],"resultDescription":"Returns structured NFT metadata for the specified zkSync token, typically including token name, description, image URL, animation URL (if any), and a list of attributes/traits such as background, rarity tier, and other collection-specific properties.","failureModes":["Invalid or non-existent contract address returns an error or empty response","Token ID not minted or out of range returns not-found error","Contract is not an NFT contract (e.g., ERC-20) returns metadata parsing failure","zkSync network congestion or RPC unavailability causes timeout","Malformed input (wrong type for tokenId or contractAddress) causes validation error","Metadata hosted off-chain (IPFS/HTTP) may be unavailable if the gateway is down"],"whenToPreferThis":"Use this endpoint when you specifically need NFT metadata from the zkSync or zkSync Era Layer-2 network. It is preferable over generic multi-chain NFT APIs when you know the asset lives on zkSync and want fast, pay-per-call access without a subscription. It's ideal for agents that need lightweight, on-demand token metadata lookups without maintaining their own blockchain node.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-18T06:47:27.132Z","isFirstParty":false,"canonicalSlug":"synapse-api-zksync-nft-metadata-lookup-f1fa0aa3"}