{"id":"5b70b118-5af2-473a-89d9-2a1f34b69fda","shortId":"HrMjqs","kind":"x402","title":"Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.","tagline":"Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.","description":"lowpaymentfee.com is a pay-per-request API platform that uses the x402 protocol to accept USDC payments on the Base network. The specific endpoint `/api/v1/generate/resource/72` is listed as \"Premium API Access\" and costs $0.02 per call (20,000 base units of USDC with 6 decimals). No API keys, accounts, or rate limits are required — callers simply attach an x402 payment header to each request.\n\nThe broader platform advertises multiple API categories including Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at the same $0.02/request price point and settle via USDC on Base.\n\nHowever, the specific functionality behind `/api/v1/generate/resource/72` is not documented. The crawled docs, pricing, and API pages returned only \"Connect wallet\" with no further content. There is no OpenAPI schema, no request/response examples, and no description of what this particular resource generates. The endpoint is live (returns a valid 402 challenge), but what it actually produces is unknown from available materials.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","no-api-key","json-response","post-method"],"categories":["infrastructure","utility"],"synonyms":["x402 API","pay-per-call API","micropayment API","USDC API","Base network API","lowpaymentfee","crypto-paid API"],"warnings":["No documentation available — docs, pricing, API, and README pages all return only 'Connect wallet'","The specific functionality of /api/v1/generate/resource/72 is completely undocumented","No OpenAPI schema or request/response examples are available","No way to verify what data or service is returned after payment"],"endpointUrl":"https://lowpaymentfee.com/api/v1/generate/resource/72","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/72","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge, but there is no documentation, no OpenAPI schema, no request/response examples, and no description of what resource/72 actually does. The docs, pricing, and API pages are all blank beyond 'Connect wallet'. This is effectively a stub 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'/request':13,28,145 '0.02':12,27,65,144 '000':69 '20':68 '402':202 '6':75 'Base network API' 'USDC API' 'accept':46 'access':62 'account':80 'actual':207 'advertis':99 'ai':111 'analysi':115 'analyt':105 'api':5,20,38,61,78,101,168 'attach':88 'avail':212 'base':8,23,51,70,153 'behind':158 'broader':97 'call':4,19,67 'caller':86 'categori':102 'challeng':203 'classif':118 'connect':172 'content':177 'convers':135 'cost':64 'crawl':164 'crypto-paid API' 'data':104,108 'decim':76 'descript':188 'doc':165 'document':162 'embed':119 'endpoint':55,138,196 'estim':129 'exampl':185 'exchang':124 'export':109 'feed':123 'financ':120 'function':157 'gas':128 'generat':136,194 'geocod':133 'header':92 'howev':154 'includ':103 'infrastructur':131 'insight':110 'json-response' 'key':79 'learn':113 'limit':83 'list':58,140 'live':198 'lowpaymentfee' 'lowpaymentfee.com':31 'machin':112 'materi':213 'metric':106 'micropayment API' 'multipl':100 'network':9,24,52 'no-api-key' 'openapi':181 'page':169 'particular':192 'pay':2,17,35 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request':34 'payment':48,91 'per':3,18,36,66 'platform':6,21,39,98 'point':147 'post-method' 'premium':60 'price':122,146,166 'produc':208 'protocol':44 'quot':127 'rate':82,125 'report':107 'request':37,95 'request/response':184 'requir':85 'resourc':193 'return':170,199 'schema':182 'sentiment':114 'settl':149 'simpli':87 'specif':54,156 'summar':117 'text':116 'token':126 'unit':71 'unknown':210 'usdc':15,30,47,73,151 'usdc-base-network' 'use':41 'util':132 'valid':134,201 'via':10,25,150 'wallet':173 'web3':121 'x402':11,26,43,90 'x402 API' 'x402-payment'","prices":[{"id":"eb7645ce-a90f-4318-a03a-c648b4801087","listingId":"5b70b118-5af2-473a-89d9-2a1f34b69fda","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/72","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:36:41.500Z"}],"sources":[{"listingId":"5b70b118-5af2-473a-89d9-2a1f34b69fda","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/generate/resource/72","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:36:41.500Z","lastSeenAt":"2026-04-28T20:04:13.709Z"}],"details":{"listingId":"5b70b118-5af2-473a-89d9-2a1f34b69fda","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/72 \\\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":"Endpoint returns a valid x402 402 challenge with maxAmountRequired of 20000 USDC base units on Base network","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/72"},{"claim":"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: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/72"},{"claim":"Platform lists categories including Data & Analytics, AI & ML, Finance & Web3, and Infrastructure","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium API resources with per-call USDC micropayments on Base","Agent-driven workflows that need keyless, pay-as-you-go API access","Programmatic resource generation via x402-authenticated POST requests"],"bestFor":["Developers wanting zero-signup, pay-per-use API access","AI agents with x402-compatible wallets on Base","Use cases requiring low-friction micropayment-gated endpoints"],"notFor":["Users who need detailed API documentation or schemas before integrating","High-volume callers who prefer subscription-based pricing over per-call fees","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:47.043Z"},"updatedAt":"2026-04-28T20:04:13.709Z"}}