{"id":"fa20c1c9-2c22-4977-9ce6-972010393822","shortId":"9BBZCH","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/52` 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 52), though the exact response payload is not documented. Payment is settled on the Base network using USDC (contract `0x8335…2913`) at $0.02 per request (20,000 base units with 6 decimals).\n\nThe platform advertises a uniform $0.02/request pricing model across all endpoints with no API keys, no rate limits, and no minimum commitments. The x402 challenge was successfully captured, confirming the endpoint is live and accepting POST requests. However, there is no OpenAPI specification, no detailed documentation of request/response schemas, and the crawled docs and pricing pages only returned a \"Connect wallet\" prompt with no additional content. The NFT endpoint specifically is not listed on the homepage's catalog of available APIs, making its exact functionality unclear.\n\nBecause the endpoint's input parameters and output schema are undocumented, callers will need to experiment or contact the provider to understand what data is returned. The platform appears to be a demonstration or early-stage deployment of x402-based micropayment APIs on Base.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","nft-data","pay-per-request","no-api-key"],"categories":["web3","nft"],"synonyms":["NFT API","NFT data endpoint","x402 NFT","micropayment API","USDC pay-per-call","Base network API","lowpaymentfee"],"warnings":["No OpenAPI or schema documentation available for this endpoint","The /api/v1/nfts/52 endpoint is not listed in the provider's homepage API catalog — its purpose and response format are unknown","Docs, pricing, and README pages all returned only 'Connect wallet' with no useful content","The platform appears to be early-stage or a demo; stability and longevity are uncertain"],"endpointUrl":"https://lowpaymentfee.com/api/v1/nfts/52","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/52","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no documentation of request parameters, response schema, or even what this NFT endpoint returns. The specific /nfts/52 path is not listed among the provider's advertised APIs, and all doc/pricing pages returned only a wallet-connect 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'/request':111 '0.02':10,24,95,110 '000':99 '0x8335':92 '20':98 '2913':93 '52':73 '6':103 'Base network API' 'NFT API' 'NFT data endpoint' 'USDC pay-per-call' 'accept':140 'across':114 'addit':170 'advertis':107 'ai/ml':55 'analyt':54 'api':51,119,186,235 'appear':64,220 'avail':185 'base':8,22,87,100,233,237 'base-network' 'caller':203 'captur':133 'catalog':183 'challeng':130 'collect':42 'commit':127 'confirm':134 'connect':165 'contact':209 'content':171 'contract':91 'crawl':157 'data':5,19,53,70,215 'decim':104 'demonstr':224 'deploy':229 'detail':150 'doc':158 'document':81,151 'earli':227 'early-stag':226 'endpoint':6,20,30,63,116,136,174,194 'exact':76,189 'experi':207 'finance/web3':57 'function':190 'gate':3,17 'homepag':181 'howev':143 'id':72 'infer':56 'infrastructur':59 'input':196 'key':120 'limit':123 'list':178 'live':138 'lowpaymentfee' 'lowpaymentfee.com':37 'make':187 'micropay':234 'micropayment API' 'minimum':126 'model':113 'need':205 'network':88 'nft':4,18,68,173 'nft-data' 'nft-relat':67 'no-api-key' 'offer':40 'openapi':147 'output':199 'page':161 'paramet':197 'part':34 'pay':9,23,48 'pay-per-request':47 'payload':78 'payment':82 'per':11,25,49,96 'platform':38,106,219 'post':141 'price':112,160 'prompt':167 'protocol':46 'provid':211 'rate':122 'relat':69 'request':12,26,50,97,142 'request/response':153 'resourc':71 'respons':77 'return':163,217 'schema':154,200 'serv':66 'settl':84 'span':52 'specif':62,148,175 'stage':228 'success':132 'though':74 'unclear':191 'understand':213 'undocu':202 'uniform':109 'unit':101 'usdc':14,28,90 'usdc-settlement' 'use':89 'util':60 'wallet':166 'x402':2,16,45,129,232 'x402 NFT' 'x402-based':231 'x402-gated':1,15 'x402-payment' 'x402-protocol':44","prices":[{"id":"cf28f6fd-68cd-4b91-ba0d-089e7e927444","listingId":"fa20c1c9-2c22-4977-9ce6-972010393822","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/52","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:32.893Z"}],"sources":[{"listingId":"fa20c1c9-2c22-4977-9ce6-972010393822","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/nfts/52","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:32.893Z","lastSeenAt":"2026-04-22T05:32:24.136Z"}],"details":{"listingId":"fa20c1c9-2c22-4977-9ce6-972010393822","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/nfts/52 \\\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 requesting USDC payment on Base network with maxAmountRequired of 20000 base units","source_url":"https://lowpaymentfee.com/api/v1/nfts/52"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/nfts/52"}],"useCases":["Fetching NFT metadata or details for a specific NFT (ID 52) via a single paid request","Integrating pay-per-call NFT data into agent workflows without managing API keys","Testing x402 micropayment protocol integrations on Base"],"bestFor":["Developers experimenting with x402 pay-per-request protocols","Agents needing keyless, on-demand NFT data access","Low-volume, no-commitment API consumption"],"notFor":["Production workloads requiring documented, stable API contracts","Bulk NFT data retrieval across many token IDs","Users who need fiat-only payment options"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:12:50.24Z"},"updatedAt":"2026-04-22T05:32:24.136Z"}}