{"id":"58ed9a9e-c48a-4908-b93a-9cec03150f33","shortId":"cmywTX","kind":"x402","title":"x402-gated premium API access on Base network, pay $0.02 per request in USDC.","tagline":"x402-gated premium API access on Base network, pay $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com is part of a broader platform offering pay-per-request APIs across data analytics, AI/ML inference, finance/Web3, and infrastructure utility categories. The specific resource `/api/v1/generate/resource/171` is listed as \"Premium API Access\" and is gated behind the x402 payment protocol, settling in USDC on the Base network.\n\nThe x402 challenge confirms the endpoint is live and accepts exact-scheme payments with a maximum amount of 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals). The platform advertises a flat $0.02 per request across all its endpoints, with no API keys, no rate limits, and instant access. Payment is made via the X-PAYMENT header per the x402 protocol.\n\nHowever, the actual functionality behind this specific resource path (`/resource/171`) is unclear. The platform lists many endpoint categories (analytics, AI, finance, utilities) but the generic \"Premium API Access\" label and the `/generate/resource/171` path do not map clearly to any documented capability. Documentation pages (`/docs`, `/pricing`, `/README`) returned only a \"Connect wallet\" prompt with no substantive content. Without request/response schemas or examples, it is impossible to confirm what data or computation this endpoint returns.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key"],"categories":["infrastructure"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","lowpaymentfee","Base network API","crypto-paid API"],"warnings":["No documentation available — /docs, /pricing, and /README pages return only 'Connect wallet' with no content","The specific functionality of /api/v1/generate/resource/171 is unknown; 'Premium API Access' is a generic label","No request or response schema is provided; callers cannot know what to send or expect back","The platform lists many endpoint categories but none map clearly to this resource path"],"endpointUrl":"https://lowpaymentfee.com/api/v1/generate/resource/171","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/generate/resource/171","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 request/response schema, and no indication of what this specific resource actually does. The docs, pricing, and README pages are all empty beyond a wallet-connect prompt. This is effectively a stub 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'/docs':192 '/generate/resource/171':180 '/pricing':193 '/readme':194 '/resource/171':158 '0.02':11,26,107,119 '000':102 '20':101 '6':112 'Base network API' 'USDC micropayment API' 'accept':91 'access':6,21,66,135,176 'across':47,122 'actual':151 'advertis':116 'ai':168 'ai/ml':50 'amount':99 'analyt':49,167 'api':5,20,46,65,128,175 'base':8,23,80,103 'base-network' 'behind':70,153 'broader':39 'capabl':189 'categori':56,166 'challeng':84 'clear':185 'comput':218 'confirm':85,214 'connect':198 'content':204 'crypto-paid API' 'data':48,216 'decim':113 'document':188,190 'endpoint':32,87,125,165,220 'exact':93 'exact-schem':92 'exampl':209 'financ':169 'finance/web3':52 'flat':118 'function':152 'gate':3,18,69 'generic':173 'header':144 'howev':149 'imposs':212 'infer':51 'infrastructur':54 'instant':134 'key':129 'label':177 'limit':132 'list':62,163 'live':89 'lowpaymentfee' 'lowpaymentfee.com':34 'made':138 'mani':164 'map':184 'maximum':98 'network':9,24,81 'no-api-key' 'offer':41 'page':191 'part':36 'path':157,181 'pay':10,25,43 'pay-per-call API' 'pay-per-request':42 'payment':73,95,136,143 'per':12,27,44,120,145 'platform':40,115,162 'premium':4,19,64,174 'prompt':200 'protocol':74,148 'rate':131 'request':13,28,45,121 'request/response':206 'resourc':59,156 'return':195,221 'schema':207 'scheme':94 'settl':75 'sinc':109 'specif':58,155 'substant':203 'unclear':160 'unit':104 'usd':108 'usdc':15,30,77,106,110 'usdc-settlement' 'use':111 'util':55,170 'via':139 'wallet':199 'without':205 'x':142 'x-payment':141 'x402':2,17,72,83,147 'x402 API' 'x402-gated':1,16 'x402-payment'","prices":[{"id":"8d95fd78-f4a4-4b00-9ad2-a88be3584773","listingId":"58ed9a9e-c48a-4908-b93a-9cec03150f33","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/generate/resource/171","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:37:14.912Z"}],"sources":[{"listingId":"58ed9a9e-c48a-4908-b93a-9cec03150f33","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/generate/resource/171","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:37:14.912Z","lastSeenAt":"2026-04-28T17:34:18.374Z"}],"details":{"listingId":"58ed9a9e-c48a-4908-b93a-9cec03150f33","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/171 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -d '{}'","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/171"},{"claim":"The platform advertises $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/171"},{"claim":"Documentation pages (/docs, /pricing, /README) returned only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Paying per request for API access without needing API keys or subscriptions","Agent-driven workflows that settle API costs in USDC on Base","Accessing utility or generation endpoints with micropayments"],"bestFor":["Developers wanting keyless, pay-per-use API access","AI agents with x402-compatible payment capabilities","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users who need detailed API documentation or schemas before integrating","High-volume use cases where per-request pricing may add up","Anyone requiring non-crypto payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:45.478Z"},"updatedAt":"2026-04-28T17:34:18.374Z"}}