{"id":"6c9b62b2-904c-40f6-9b82-688533eccc2f","shortId":"gbsQWy","kind":"x402","title":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","tagline":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. The site advertises a broad catalog of API categories — data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request, settled in USDC on the Base network. The specific resource `/api/resource/17` does not map to any named endpoint on the site's landing page, so its exact functionality is unclear; it may be a generic or numbered resource within the platform's catalog.\n\nPayment is handled via the x402 exact-payment scheme. The 402 challenge confirms the endpoint is live and accepts USDC (contract 0x8335…2913 on Base) with a maxAmountRequired of 20,000 base units, which equals $0.02 (USDC uses 6 decimals). No API keys or rate limits are advertised. The endpoint accepts HTTP POST and returns application/json.\n\nDocumentation is extremely thin. The /docs, /api, /pricing, and /README pages all returned only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what data or functionality `/api/resource/17` actually provides. The landing page lists many endpoints but none matching this specific resource path. Prospective users should be aware that the actual behavior of this endpoint is undocumented.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-response","http-post"],"categories":["api","misc"],"synonyms":["low payment fee","x402 api","micropayment api","pay per call api","base usdc api","premium api access"],"warnings":["The specific endpoint /api/resource/17 does not appear in the site's listed API catalog — its purpose is unknown.","All documentation pages (/docs, /api, /pricing, /README) returned only 'Connect wallet' with no content.","No OpenAPI schema, request format, or response examples are available.","Actual functionality behind this endpoint is completely undocumented."],"endpointUrl":"https://lowpaymentfee.com/api/resource/17","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/resource/17","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no request/response examples, and the specific resource /api/resource/17 is not described anywhere on the site. Effectively a stub 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'/api/resource/17':79,207 '/docs':174 '/pricing':176 '/readme':178 '/request':13,28 '0.02':12,27,66,148 '000':143 '0x8335':134 '20':142 '2913':135 '402':123 '6':151 'accept':131,163 'access':7,22,38 'actual':208,230 'advertis':46,160 'ai':55 'analyt':54 'api':6,21,37,51,154 'application/json':168 'awar':227 'base':9,24,74,137,144 'base usdc api' 'behavior':231 'broad':48 'call':4,19 'catalog':49,111 'categori':52 'challeng':124 'confirm':125 'connect':184 'content':190 'contract':133 'data':53,204 'decim':152 'descript':201 'document':169 'endpoint':32,86,127,162,215,234 'equal':147 'exact':95,119 'exact-pay':118 'exampl':198 'extrem':171 'financ':58 'function':96,206 'generic':103 'handl':114 'http':164 'http-post' 'infrastructur':61 'json-response' 'key':155 'land':91,211 'learn':57 'limit':158 'list':213 'live':129 'low payment fee' 'lowpaymentfee.com':34 'machin':56 'mani':214 'map':82 'match':218 'maxamountrequir':140 'may':100 'micropayment api' 'name':85 'network':75 'none':217 'number':105 'openapi':194 'page':92,179,212 'path':222 'pay':2,17 'pay per call api' 'pay-per-cal':1,16 'pay-per-request' 'payment':42,112,120 'per':3,18,67 'platform':109 'post':165 'premium':5,20,36 'premium api access' 'price':64 'prompt':186 'prospect':223 'protocol':43 'provid':35,209 'rate':157 'request':68 'request/response':197 'resourc':78,106,221 'return':167,181 'schema':195 'scheme':121 'settl':69 'site':45,89 'specif':77,220 'substant':189 'thin':172 'unclear':98 'undocu':236 'unit':145 'usdc':15,30,71,132,149 'usdc-base' 'use':150 'user':224 'util':62 'via':10,25,39,115 'wallet':185 'web3':59 'within':107 'x402':11,26,41,117 'x402 api' 'x402-payment'","prices":[{"id":"6ea35a88-134e-46e4-bd58-2b3827c2d1a8","listingId":"6c9b62b2-904c-40f6-9b82-688533eccc2f","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/resource/17","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:33:55.040Z"}],"sources":[{"listingId":"6c9b62b2-904c-40f6-9b82-688533eccc2f","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/resource/17","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:33:55.040Z","lastSeenAt":"2026-04-22T13:30:20.922Z"}],"details":{"listingId":"6c9b62b2-904c-40f6-9b82-688533eccc2f","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/resource/17 \\\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 site advertises $0.02 per request with no API keys, no rate limits, and instant access on Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"The x402 challenge confirms USDC on Base with maxAmountRequired of 20000 base units (=$0.02).","source_url":"https://lowpaymentfee.com/api/resource/17"},{"claim":"The USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.","source_url":"https://lowpaymentfee.com/api/resource/17"}],"useCases":["Programmatic access to an unspecified premium resource via x402 micropayment","Agent-driven API consumption without API keys or subscriptions","Testing x402 payment flows on Base network"],"bestFor":["Developers experimenting with x402 payment protocol on Base","Agents that need keyless, pay-per-call API access","Low-cost micropayment API consumption"],"notFor":["Users who need documented, well-specified API contracts","Production workloads requiring SLAs or guaranteed uptime","Anyone needing to know exactly what data the endpoint returns before paying"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T18:17:33.067Z"},"updatedAt":"2026-04-22T13:30:20.922Z"}}