{"id":"6224a528-9338-4482-b104-82610376b5b6","shortId":"y5DAXu","kind":"x402","title":"x402-gated NFT data endpoint on Base, pay $0.02 per request in USDC.","tagline":"x402-gated NFT data endpoint on Base, pay $0.02 per request in USDC.","description":"This endpoint at `/api/v1/nfts/59` is part of the lowpaymentfee.com platform, which offers a collection of x402-protocol pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. The specific endpoint appears to serve NFT-related data (resource ID 59), though the exact response payload is not documented. Payment is settled on the Base network using USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) at a cost of $0.02 per request (20,000 base units with 6 decimals). The endpoint uses the x402 \"exact\" payment scheme and accepts POST requests.\n\nThe platform advertises a uniform $0.02/request pricing model across all its endpoints, with no API keys, no rate limits, and no minimum commitments required. The x402 challenge was successfully captured with version 1 of the protocol, confirming the endpoint is live. However, there is no OpenAPI schema, no detailed documentation of request parameters or response format, and no example payloads available. The `/api`, `/pricing`, and `/README` pages all resolve to a minimal \"Connect wallet\" prompt with no additional technical content. The NFT endpoint's specific functionality (whether it returns metadata, ownership info, market data, etc.) cannot be determined from available materials.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","nft-data","pay-per-request","no-api-key","post-method"],"categories":["web3","nft"],"synonyms":["NFT API","NFT metadata","x402 NFT endpoint","pay-per-call NFT","Base USDC API","lowpaymentfee","crypto NFT data","402 payment API"],"warnings":["No documentation of request body parameters or response format for /api/v1/nfts/59","The specific data returned by this NFT endpoint is unknown — it could be metadata, ownership, market data, or something else entirely","No OpenAPI schema, no examples, and no README content available","The platform's /api, /pricing, and /README pages contain no useful technical information"],"endpointUrl":"https://lowpaymentfee.com/api/v1/nfts/59","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://lowpaymentfee.com/api/v1/nfts/59","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but there is no documentation of request parameters, response schema, or what NFT data is actually returned. The /api, /pricing, and /README pages are empty beyond a wallet connect prompt. This is effectively a stub 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'/api/v1/nfts/59':32 '/pricing':183 '/readme':185 '/request':125 '0.02':10,24,97,124 '000':101 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':92 '1':152 '20':100 '402 payment API' '59':73 '6':105 'Base USDC API' 'NFT API' 'NFT metadata' 'accept':116 'across':128 'addit':197 'advertis':121 'ai/ml':55 'analyt':54 'api':51,134 'appear':64 'avail':180,219 'base':8,22,87,102 'base-network' 'cannot':215 'captur':149 'challeng':146 'collect':42 'commit':142 'confirm':156 'connect':192 'content':199 'contract':91 'cost':95 'crypto NFT data' 'data':5,19,53,70,213 'decim':106 'detail':168 'determin':217 'document':81,169 'endpoint':6,20,30,63,108,131,158,202 'etc':214 'exact':76,112 'exampl':178 'finance/web3':57 'format':175 'function':205 'gate':3,17 'howev':161 'id':72 'infer':56 'info':211 'infrastructur':59 'key':135 'limit':138 'live':160 'lowpaymentfee' 'lowpaymentfee.com':37 'market':212 'materi':220 'metadata':209 'minim':191 'minimum':141 'model':127 'network':88 'nft':4,18,68,201 'nft-data' 'nft-relat':67 'no-api-key' 'offer':40 'openapi':165 'ownership':210 'page':186 'paramet':172 'part':34 'pay':9,23,48 'pay-per-call NFT' 'pay-per-request':47 'payload':78,179 'payment':82,113 'per':11,25,49,98 'platform':38,120 'post':117 'post-method' 'price':126 'prompt':194 'protocol':46,155 'rate':137 'relat':69 'request':12,26,50,99,118,171 'requir':143 'resolv':188 'resourc':71 'respons':77,174 'return':208 'schema':166 'scheme':114 'serv':66 'settl':84 'span':52 'specif':62,204 'success':148 'technic':198 'though':74 'uniform':123 'unit':103 'usdc':14,28,90 'usdc-settlement' 'use':89,109 'util':60 'version':151 'wallet':193 'whether':206 'x402':2,16,45,111,145 'x402 NFT endpoint' 'x402-gated':1,15 'x402-payment' 'x402-protocol':44","prices":[{"id":"c1772e71-01ba-4b89-86ca-e00bbf6e1b73","listingId":"6224a528-9338-4482-b104-82610376b5b6","amountUsd":null,"unit":"per_call","nativeCurrency":"USD COIN","nativeAmount":"20000","chain":"base","payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","paymentMethod":"x402-usd coin","isPrimary":true,"details":{"scheme":"exact","mime_type":"application/json","accepts_all":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://lowpaymentfee.com/api/v1/nfts/59","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:28.452Z"}],"sources":[{"listingId":"6224a528-9338-4482-b104-82610376b5b6","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/nfts/59","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:28.452Z","lastSeenAt":"2026-04-22T15:03:11.936Z"}],"details":{"listingId":"6224a528-9338-4482-b104-82610376b5b6","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/nfts/59 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge with x402Version 1, exact scheme, on Base network using USDC at maxAmountRequired 20000","source_url":"https://lowpaymentfee.com/api/v1/nfts/59"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/nfts/59"},{"claim":"Platform advertises $0.02/request pricing, no API keys, no rate limits, instant access, Base network","source_url":"https://lowpaymentfee.com"}],"useCases":["Fetching NFT-related data without requiring API key registration","Programmatic access to NFT information with per-request micropayments","Agent-driven NFT data retrieval settled on Base L2"],"bestFor":["Developers wanting zero-signup NFT data access","AI agents that can settle x402 payments on Base","Projects needing low-cost per-call NFT queries without subscriptions"],"notFor":["Users needing well-documented, schema-validated NFT APIs","High-volume consumers who would benefit from bulk pricing or subscriptions","Anyone requiring non-crypto payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:12:57.677Z"},"updatedAt":"2026-04-22T15:03:11.936Z"}}