{"id":"9c79618b-07bb-4992-92c1-063707616fbd","shortId":"BTmwdd","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/45` 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 resource appears to serve NFT-related data (inferred from the URL path `/nfts/45`), though the provider's landing page does not explicitly list this particular endpoint among its advertised API categories. The endpoint is live and returns a valid x402 challenge.\n\nPayment is settled on the Base network using USDC (contract `0x8335…2913`) via the \"exact\" scheme. The `maxAmountRequired` is 20,000 base units, which at 6 decimals equals $0.02 per request. No API keys or rate limits are advertised; access is granted purely through the x402 payment header. The response MIME type is `application/json` and the endpoint accepts HTTP POST.\n\nThe platform advertises a uniform $0.02/request pricing model across all its endpoints with no minimums or commitments. Documentation is extremely sparse — the `/api`, `/pricing`, and `/README` pages all resolve to a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available. The actual data returned by this NFT endpoint is unknown beyond the JSON content type.","tags":[],"capabilities":["x402-payment","per-request-billing","usdc-settlement","base-network","nft-data","json-response","no-api-key"],"categories":["web3","nft"],"synonyms":["NFT API","NFT data endpoint","pay-per-request NFT","x402 NFT","USDC micropayment API","Base network API","lowpaymentfee"],"warnings":["No documentation available — /api, /pricing, and /README pages all show only 'Connect wallet'","No OpenAPI spec or request/response schema provided","The /api/v1/nfts/45 endpoint is not listed among the provider's advertised API categories, so its purpose is unclear","Actual response payload structure is completely unknown"],"endpointUrl":"https://lowpaymentfee.com/api/v1/nfts/45","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/45","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 with clear pricing, but there is zero documentation on request parameters, response schema, or what data this NFT endpoint actually returns. The /nfts/45 path is not listed among the provider's advertised endpoints, and all doc pages just show 'Connect wallet'. Effectively a stub 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'/api/v1/nfts/45':32 '/nfts/45':74 '/pricing':187 '/readme':189 '/request':169 '0.02':10,24,131,168 '000':123 '0x8335':113 '20':122 '2913':114 '6':128 'Base network API' 'NFT API' 'NFT data endpoint' 'USDC micropayment API' 'accept':160 'access':142 'across':172 'actual':218 'advertis':90,141,165 'ai/ml':53 'among':88 'analyt':52 'api':49,91,135 'appear':62 'application/json':156 'avail':216 'base':8,22,108,124 'base-network' 'beyond':227 'categori':92 'challeng':102 'collect':40 'commit':180 'connect':195 'content':230 'contract':112 'data':5,19,51,68,219 'decim':129 'detail':202 'document':181,211 'endpoint':6,20,30,87,94,159,175,224 'equal':130 'exact':117 'exampl':214 'explicit':83 'extrem':183 'finance/web3':55 'gate':3,17 'grant':144 'header':150 'http':161 'infer':54,69 'infrastructur':57 'json':229 'json-response' 'key':136 'land':79 'limit':139 'list':84 'live':96 'lowpaymentfee' 'lowpaymentfee.com':37 'maxamountrequir':120 'mime':153 'minimum':178 'model':171 'network':109 'nft':4,18,66,223 'nft-data' 'nft-relat':65 'no-api-key' 'openapi':206 'page':80,190 'part':34 'particular':86 'path':73 'pay':9,23,46 'pay-per-request':45 'pay-per-request NFT' 'payload':215 'payment':103,149 'per':11,25,47,132 'per-request-billing' 'platform':38,164 'post':162 'price':170 'prompt':197 'protocol':44 'provid':77 'pure':145 'rate':138 'relat':67 'request':12,26,48,133 'request/response':209 'resolv':192 'resourc':61 'respons':152 'return':98,220 'schema':210 'scheme':118 'serv':64 'settl':105 'span':50 'spars':184 'spec':207 'specif':60 'technic':201 'though':75 'type':154,231 'uniform':167 'unit':125 'unknown':226 'url':72 'usdc':14,28,111 'usdc-settlement' 'use':110 'util':58 'valid':100 'via':115 'wallet':196 'x402':2,16,43,101,148 'x402 NFT' 'x402-gated':1,15 'x402-payment' 'x402-protocol':42","prices":[{"id":"db1322f7-04da-461f-80e6-223c39591b09","listingId":"9c79618b-07bb-4992-92c1-063707616fbd","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/45","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:28.116Z"}],"sources":[{"listingId":"9c79618b-07bb-4992-92c1-063707616fbd","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/nfts/45","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:28.116Z","lastSeenAt":"2026-04-22T16:32:58.654Z"}],"details":{"listingId":"9c79618b-07bb-4992-92c1-063707616fbd","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/nfts/45\n# Returns 402 with x402 challenge. Include X-PAYMENT header with valid payment proof to receive data.","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Uniform pricing of $0.02 per request with no minimums or commitments","source_url":"https://lowpaymentfee.com"},{"claim":"Payment on Base network, no API keys, no rate limits","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns maxAmountRequired of 20000 base units in USDC (6 decimals) = $0.02","source_url":"https://lowpaymentfee.com/api/v1/nfts/45"},{"claim":"USDC asset contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/nfts/45"}],"useCases":["Fetching NFT metadata or details for token ID 45 via a single paid request","Integrating pay-per-call NFT data into an AI agent workflow without managing API keys","Programmatic access to NFT information settled on Base L2 in USDC"],"bestFor":["Developers wanting keyless, pay-per-use NFT data access","AI agents that can settle x402 payments on Base","Quick one-off NFT data lookups without subscription commitments"],"notFor":["High-volume NFT data ingestion where per-request costs add up","Users needing detailed API documentation or guaranteed SLAs","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:12:58.311Z"},"updatedAt":"2026-04-22T16:32:58.654Z"}}