{"uid":"cap_Grb-Rv3PNv57HfmYGnJvW","slug":"nft-ownership-verification-token-gating-4df43d10","name":"NFT Ownership Verification (Token-Gating)","description":"Realtime holds-or-not ownership check (token-gating) — ALWAYS live","url":"https://x402.professorsausages.com/nft/:chain/verify-ownership?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","required":["chain","address"],"properties":{"chain":{"enum":["base","ethereum","bitcoin","tron","litecoin","monero","dash","zcash","bitcoin-cash","dogecoin","bitcoin-gold","verge","solana"],"type":"string","examples":["base"],"description":"Which chain the address belongs to. base and ethereum run full on-chain mode; the rest are list-only mode."},"address":{"type":"string","examples":["0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"],"maxLength":128,"description":"The address in that chain's native format (0x… for EVM, base58/bech32 otherwise). Checked against that chain's shape BEFORE the payment gate — a malformed address is a free 400, never a 402."}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","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":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_YuGOSy6_kAkC8VNmAO2lC","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Performs a real-time, live ownership check to verify whether a given wallet address holds a specific NFT on a given blockchain chain.","exampleAgentPrompt":"Can you do a live on-chain ownership check to verify whether wallet 0xAbCd...1234 actually holds token #42 from the NFT contract 0xDead...Beef on the Base chain?","exampleUseCases":null,"resultDescription":"Returns a live boolean indicating whether the specified wallet address currently holds the given NFT (token-gating result), along with supporting ownership details such as contract address, chain, token ID, and any relevant scam or metadata signals.","failureModes":["Invalid or malformed wallet address returns a validation error","Unsupported chain identifier returns an error indicating chain is not supported","NFT contract address not found on specified chain returns not-found error","Rate limiting or payment failure returns 402 Payment Required","RPC timeout or chain node unavailability causes delayed or failed response"],"whenToPreferThis":"Use this endpoint when you need a guaranteed live, real-time on-chain NFT ownership check — not a cached snapshot — for token-gating, access control, or scam verification purposes. Prefer this over static indexers when freshness is critical and the result must reflect the current chain state.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-11-01T12:36:24.443Z","isFirstParty":false,"canonicalSlug":"nft-ownership-verification-token-gating-4df43d10"}