{"uid":"cap_Nen2JI4K_ixfG0oYz8CdV","slug":"synapse-api-arbitrum-nft-metadata-lookup-d17accb5","name":"Synapse API — Arbitrum 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/arbitrum/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_UX4sp6XEFnpiP16-iTk3d","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 on-chain NFT metadata for a given contract address and token ID on the Arbitrum network","exampleAgentPrompt":"Can you pull the metadata for token ID 1234 from the Arbitrum NFT contract at 0xAbCd1234...5678? I want to see its name, image, and traits.","exampleUseCases":[{"title":"NFT portfolio trait inspection","prompt":"I own token ID 42 from the Arbitrum contract 0x1a2b3c4d5e6f... — can you fetch its metadata so I can see what traits and rarity attributes it has?"},{"title":"NFT marketplace listing enrichment","prompt":"Before I list this NFT on a marketplace, can you grab the full metadata for token ID 99 at Arbitrum contract 0xDEAD...BEEF so I can display the correct name, image, and description?"},{"title":"NFT authenticity and detail verification","prompt":"Someone sent me an Arbitrum NFT — token ID 7 from contract 0xF00...BA4 — can you fetch its on-chain metadata so I can verify what it actually is and see its official attributes?"}],"resultDescription":"Returns on-chain NFT metadata for the specified token, typically including the token name, description, image URL, and an array of trait attributes as defined by the NFT contract on Arbitrum.","failureModes":["Invalid or non-existent contract address returns an error or empty response","Token ID not minted or out of range returns a not-found error","Contract does not implement standard ERC-721/ERC-1155 metadata may return incomplete data","Network congestion or RPC issues may cause timeout","Payment failure via x402 protocol blocks the call"],"whenToPreferThis":"Choose this endpoint when you specifically need NFT metadata from the Arbitrum Layer-2 network and want a pay-per-call model without a subscription. Prefer this over general blockchain explorers when you need structured metadata output suitable for agent pipelines, or when your use case spans multiple NFT contracts programmatically on Arbitrum.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-18T06:46:31.839Z","isFirstParty":false,"canonicalSlug":"synapse-api-arbitrum-nft-metadata-lookup-d17accb5"}