{"id":"8ce46e4f-c84d-43b9-983a-f4053d74e2e6","shortId":"mDNDvg","kind":"x402","title":"x402-gated NFT data endpoint on Base, pay-per-request with USDC at $0.02/call.","tagline":"x402-gated NFT data endpoint on Base, pay-per-request with USDC at $0.02/call.","description":"This endpoint at `/api/v1/nfts/95` is part of the lowpaymentfee.com platform, which offers a collection of pay-per-request APIs gated via the x402 protocol. The specific endpoint appears to serve NFT-related data (resource ID 95), though the exact response payload is not documented. Payment is settled on the Base network using USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) with a maximum cost of $0.02 per request (20,000 base units at 6 decimals). The endpoint accepts POST requests and returns `application/json`.\n\nThe broader lowpaymentfee.com platform advertises multiple API categories — data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced uniformly at $0.02 per request. The platform emphasizes no API keys, no rate limits, and instant access via x402 payment headers. However, there is no OpenAPI specification, no detailed documentation for individual endpoints, and no example request/response bodies available from the crawled pages. The NFT endpoint specifically (`/api/v1/nfts/95`) is not listed on the homepage's catalog, making its exact functionality unclear.\n\nThe x402 challenge was successfully captured with a 402 response, confirming the endpoint is live. The payment timeout is 300 seconds. No authentication beyond the x402 payment header is required.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","nft-data","pay-per-request","no-api-key","json-response"],"categories":["web3","nft"],"synonyms":["NFT API","NFT data endpoint","x402 NFT","pay-per-call NFT","Base USDC API","lowpaymentfee NFT","crypto NFT lookup"],"warnings":["No OpenAPI or schema documentation available for this endpoint","The /api/v1/nfts/95 endpoint is not listed in the provider's homepage API catalog — its exact purpose is unclear","No example request or response bodies are available; response format is unknown","The crawled /api, /pricing, and /README pages returned only a 'Connect wallet' prompt with no useful content"],"endpointUrl":"https://lowpaymentfee.com/api/v1/nfts/95","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/95","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI schema, no documentation for this specific NFT endpoint, no example request/response bodies, and the endpoint isn't even listed on the provider's homepage catalog. Functionality must be inferred from the URL path 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'/call':17,34 '0.02':16,33,97,137 '000':101 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':91 '20':100 '300':215 '402':204 '6':105 '95':72 'Base USDC API' 'NFT API' 'NFT data endpoint' 'accept':109 'access':151 'advertis':119 'ai':125 'analyt':124 'api':54,121,144 'appear':63 'application/json':114 'authent':218 'avail':173 'base':8,25,86,102 'base-network' 'beyond':219 'bodi':172 'broader':116 'captur':201 'catalog':190 'categori':122 'challeng':198 'collect':48 'confirm':206 'contract':90 'cost':95 'crawl':176 'crypto NFT lookup' 'data':5,22,69,123 'decim':106 'detail':163 'document':80,164 'emphas':142 'endpoint':6,23,36,62,108,167,180,208 'exact':75,193 'exampl':170 'financ':128 'function':194 'gate':3,20,55 'header':155,223 'homepag':188 'howev':156 'id':71 'individu':166 'infrastructur':131 'instant':150 'json-response' 'key':145 'learn':127 'limit':148 'list':185 'live':210 'lowpaymentfee NFT' 'lowpaymentfee.com':43,117 'machin':126 'make':191 'maximum':94 'multipl':120 'network':87 'nft':4,21,67,179 'nft-data' 'nft-relat':66 'no-api-key' 'offer':46 'openapi':160 'page':177 'part':40 'pay':10,27,51 'pay-per-call NFT' 'pay-per-request':9,26,50 'payload':77 'payment':81,154,212,222 'per':11,28,52,98,138 'platform':44,118,141 'post':110 'price':134 'protocol':59 'rate':147 'relat':68 'request':12,29,53,99,111,139 'request/response':171 'requir':225 'resourc':70 'respons':76,205 'return':113 'second':216 'serv':65 'settl':83 'specif':61,161,181 'success':200 'though':73 'timeout':213 'unclear':195 'uniform':135 'unit':103 'usdc':14,31,89 'usdc-settlement' 'use':88 'util':132 'via':56,152 'web3':129 'x402':2,19,58,153,197,221 'x402 NFT' 'x402-gated':1,18 'x402-payment'","prices":[{"id":"321c6d54-1644-49cc-a409-283ea2260da2","listingId":"8ce46e4f-c84d-43b9-983a-f4053d74e2e6","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/95","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:28.772Z"}],"sources":[{"listingId":"8ce46e4f-c84d-43b9-983a-f4053d74e2e6","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/nfts/95","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:28.772Z","lastSeenAt":"2026-04-22T11:33:08.146Z"}],"details":{"listingId":"8ce46e4f-c84d-43b9-983a-f4053d74e2e6","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/nfts/95 \\\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 402 challenge with x402Version 1, accepting USDC on Base network with maxAmountRequired of 20000 base units","source_url":"https://lowpaymentfee.com/api/v1/nfts/95"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/nfts/95"},{"claim":"Platform pricing is $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The homepage lists APIs in categories: Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving NFT metadata or details for a specific token/collection","Integrating NFT data into agent workflows without managing API keys","Paying per-request for on-demand NFT information using USDC on Base"],"bestFor":["Agents needing keyless, pay-per-call NFT data access","Developers experimenting with x402 payment protocol integrations","Low-volume or sporadic NFT data lookups where subscriptions are overkill"],"notFor":["High-volume NFT indexing or bulk data retrieval (no documented batch support)","Users who need detailed documentation or guaranteed SLAs before integrating"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:12:57.172Z"},"updatedAt":"2026-04-22T11:33:08.146Z"}}