{"id":"b90f6454-cab0-46a1-b4c4-33b3307e2e1e","shortId":"62u7ac","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/accounts/143` is listed as \"Premium API Access\" and returns a 402 challenge requesting up to 20,000 base units of USDC (i.e., $0.02) per call. The platform advertises no API keys, no rate limits, and instant access — you simply attach an x402 payment header to each request.\n\nThe broader platform offers endpoints across four categories: 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.\n\nThis particular endpoint (`/api/v1/accounts/143`) is labeled \"Premium API Access\" but its actual response payload and functionality are not documented in the crawled material. The docs, pricing, and API pages all rendered only a \"Connect wallet\" prompt with no further content. Without documentation or example responses, the exact data returned by this endpoint remains unclear.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","no-api-key","http-post","json-response"],"categories":["api-platform","data"],"synonyms":["low payment fee","x402 api","pay per call api","usdc api","base network api","micropayment api","accounts endpoint"],"warnings":["No API documentation available — docs, pricing, and API pages all render only a 'Connect wallet' prompt with no content.","The exact functionality and response schema of /api/v1/accounts/143 is undocumented and cannot be verified.","The endpoint name 'Premium API Access' is generic and does not describe what data or service is provided.","Multiple other endpoints are advertised on the landing page but this specific accounts endpoint is not among them, raising questions about its purpose."],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/143","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/accounts/143","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge, confirming pricing and payment details. However, there is no OpenAPI schema, no documentation of request/response formats, and no example payloads. The docs pages are empty (wallet-connect only). The specific purpose of /api/v1/accounts/143 beyond the label 'Premium API Access' is 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'/request':13,28,152 '0.02':12,27,78,151 '000':72 '20':71 '402':66 'accept':46 'access':62,92,163 'accounts endpoint' 'across':108 'actual':166 'advertis':83 'ai':118 'analysi':122 'analyt':112 'api':5,20,38,61,85,162,182 'attach':95 'base':8,23,51,73 'base network api' 'broader':104 'call':4,19,80 'categori':110 'challeng':67 'classif':125 'connect':188 'content':194 'convers':142 'crawl':176 'data':111,115,202 'doc':179 'document':173,196 'embed':126 'endpoint':55,107,145,157,206 'estim':136 'exact':201 'exampl':198 'exchang':131 'export':116 'feed':130 'financ':127 'four':109 'function':170 'gas':135 'generat':143 'geocod':140 'header':99 'http-post' 'i.e':77 'infrastructur':138 'insight':117 'instant':91 'json-response' 'key':86 'label':160 'learn':120 'limit':89 'list':58,147 'low payment fee' 'lowpaymentfee.com':31 'machin':119 'materi':177 'metric':113 'micropayment api' 'network':9,24,52 'no-api-key' 'offer':106 'page':183 'particular':156 'pay':2,17,35 'pay per call api' 'pay-per-cal':1,16 'pay-per-request':34 'payload':168 'payment':48,98 'per':3,18,36,79 'platform':6,21,39,82,105 'point':154 'premium':60,161 'price':129,153,180 'prompt':190 'protocol':44 'quot':134 'rate':88,132 'remain':207 'render':185 'report':114 'request':37,68,102 'respons':167,199 'return':64,203 'sentiment':121 'simpli':94 'specif':54 'summar':124 'text':123 'token':133 'unclear':208 'unit':74 'usdc':15,30,47,76 'usdc api' 'usdc-base-network' 'use':41 'util':139 'valid':141 'via':10,25 'wallet':189 'web3':128 'without':195 'x402':11,26,43,97 'x402 api' 'x402-payment'","prices":[{"id":"300f760b-14e4-4863-99b5-0fcce7e478c2","listingId":"b90f6454-cab0-46a1-b4c4-33b3307e2e1e","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/accounts/143","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:41:07.304Z"}],"sources":[{"listingId":"b90f6454-cab0-46a1-b4c4-33b3307e2e1e","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/143","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:41:07.304Z","lastSeenAt":"2026-04-24T18:32:15.538Z"}],"details":{"listingId":"b90f6454-cab0-46a1-b4c4-33b3307e2e1e","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/143 \\\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 requesting up to 20,000 base units of USDC ($0.02) on Base network","source_url":"https://lowpaymentfee.com/api/v1/accounts/143"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"The USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/143"}],"useCases":["Accessing premium account data via a single USDC micropayment on Base","Integrating pay-per-call APIs into agent workflows without API key management","Programmatic access to account information with crypto-native billing"],"bestFor":["Developers wanting keyless, pay-as-you-go API access","AI agents that can settle x402 payments autonomously","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users needing detailed API documentation or response schemas before integrating","High-volume consumers who would benefit from bulk/subscription pricing"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:34.118Z"},"updatedAt":"2026-04-24T18:32:15.538Z"}}