{"id":"073bd64a-30fe-4b67-bcb3-a3a1e92a0c49","shortId":"qZqAua","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/86` is part of the lowpaymentfee.com platform, 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 86), 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 x402 challenge was successfully captured, confirming the endpoint is live.\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. Callers authenticate purely via the x402 payment header. The endpoint accepts POST requests and returns `application/json`. However, there is no OpenAPI schema, no documented request body format, and no example responses available for this specific NFT endpoint. The broader site lists many other endpoints (analytics, AI, finance, utilities) but provides no detailed documentation for any of them beyond names and prices.\n\nBecause the NFT endpoint's input parameters and output schema are entirely undocumented, agents will need to experiment or rely on conventions to construct valid requests. The lack of documentation is a significant limitation for programmatic integration.","tags":[],"capabilities":["x402-payment","nft-data","usdc-settlement","base-network","pay-per-request","no-api-key"],"categories":["web3","nft"],"synonyms":["NFT API","NFT metadata","x402 NFT endpoint","pay-per-call NFT","lowpaymentfee NFT","Base USDC API","402 payment NFT"],"warnings":["No documentation exists for the /api/v1/nfts/86 endpoint — request body and response schema are completely unknown.","The broader lowpaymentfee.com site lists many endpoints but provides no detailed docs for any of them.","The NFT endpoint's actual data content (what NFT, what fields) is unspecified; 'Premium API Access' is a generic label used across the platform.","Pricing and /docs pages returned only 'Connect wallet' with no useful content."],"endpointUrl":"https://lowpaymentfee.com/api/v1/nfts/86","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/86","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 challenge, confirming pricing and payment details. However, there is zero documentation on request parameters, response format, or what NFT data is actually returned. No OpenAPI spec, no examples, and the crawled pages beyond the homepage are empty wallet-connect 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'/request':122 '0.02':10,24,95,121 '000':99 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':90 '20':98 '402 payment NFT' '6':103 '86':71 'Base USDC API' 'NFT API' 'NFT metadata' 'accept':150 'across':125 'advertis':118 'agent':214 'ai':185 'ai/ml':53 'analyt':52,184 'api':49,131 'appear':62 'application/json':155 'authent':141 'avail':171 'base':8,22,85,100 'base-network' 'beyond':197 'bodi':165 'broader':178 'caller':140 'captur':110 'challeng':107 'collect':40 'commit':139 'confirm':111 'construct':224 'contract':89 'convent':222 'cost':93 'data':5,19,51,68 'decim':104 'detail':191 'document':79,163,192,230 'endpoint':6,20,30,61,113,128,149,176,183,204 'entir':212 'exact':74 'exampl':169 'experi':218 'financ':186 'finance/web3':55 'format':166 'gate':3,17 'header':147 'howev':156 'id':70 'infer':54 'infrastructur':57 'input':206 'integr':237 'key':132 'lack':228 'limit':135,234 'list':180 'live':115 'lowpaymentfee NFT' 'lowpaymentfee.com':37 'mani':181 'minimum':138 'model':124 'name':198 'need':216 'network':86 'nft':4,18,66,175,203 'nft-data' 'nft-relat':65 'no-api-key' 'openapi':160 'output':209 'paramet':207 'part':34 'pay':9,23,46 'pay-per-call NFT' 'pay-per-request':45 'payload':76 'payment':80,146 'per':11,25,47,96 'platform':38,117 'post':151 'price':123,200 'programmat':236 'protocol':44 'provid':189 'pure':142 'rate':134 'relat':67 'reli':220 'request':12,26,48,97,152,164,226 'resourc':69 'respons':75,170 'return':154 'schema':161,210 'serv':64 'settl':82 'signific':233 'site':179 'span':50 'specif':60,174 'success':109 'though':72 'undocu':213 'uniform':120 'unit':101 'usdc':14,28,88 'usdc-settlement' 'use':87 'util':58,187 'valid':225 'via':143 'x402':2,16,43,106,145 'x402 NFT endpoint' 'x402-gated':1,15 'x402-payment' 'x402-protocol':42","prices":[{"id":"6d4ac229-75d2-4be9-bb2b-c81978d7d060","listingId":"073bd64a-30fe-4b67-bcb3-a3a1e92a0c49","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/86","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:32.379Z"}],"sources":[{"listingId":"073bd64a-30fe-4b67-bcb3-a3a1e92a0c49","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/nfts/86","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:32.379Z","lastSeenAt":"2026-04-22T09:02:25.993Z"}],"details":{"listingId":"073bd64a-30fe-4b67-bcb3-a3a1e92a0c49","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/nfts/86 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units in USDC on Base network.","source_url":"https://lowpaymentfee.com/api/v1/nfts/86"},{"claim":"The platform charges $0.02 per request with no API keys, no rate limits, and no minimums.","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.","source_url":"https://lowpaymentfee.com/api/v1/nfts/86"}],"useCases":["Fetching NFT data or metadata on demand with per-request USDC micropayments","Integrating NFT information into agent workflows without managing API keys","Programmatic access to NFT resources settled on Base L2"],"bestFor":["Agents or bots that need keyless, pay-as-you-go NFT data access","Developers experimenting with x402 protocol integrations","Low-volume consumers who want no subscription commitments"],"notFor":["High-volume NFT data pipelines needing documented, stable schemas","Users who need detailed API documentation or SDKs before integrating","Anyone requiring non-USDC or non-Base payment rails"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:12:51.078Z"},"updatedAt":"2026-04-22T09:02:25.993Z"}}