{"id":"54a1c98d-3bda-4bf4-b362-0d889ff698ed","shortId":"b77JLP","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 an x402-enabled API platform that offers a variety of endpoints across data & analytics, AI & machine learning, finance & Web3, and infrastructure utility categories. All endpoints are priced at $0.02 per request, paid in USDC on the Base network with no API keys, no rate limits, and no commitments required.\n\nThe specific endpoint `/api/v1/accounts/10` is listed as \"Premium API Access\" and returns a 402 challenge requesting up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is via the x402 \"exact\" scheme with a 300-second timeout. The endpoint accepts HTTP POST and returns application/json.\n\nThe broader platform advertises endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02 price point. However, documentation beyond the landing page is essentially empty (all sub-pages just show \"Connect wallet\"), so the actual request/response schemas for these endpoints are unknown. Without documentation or OpenAPI specs, callers will need to experiment to discover the expected input format and response structure.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","no-api-key","json-response","http-post"],"categories":["api-platform","infrastructure"],"synonyms":["low payment fee","x402 api","pay per call api","usdc api","base network api","micropayment api","402 payment api"],"warnings":["No OpenAPI or schema documentation available — all doc/pricing/README pages return only 'Connect wallet'","The specific purpose and expected input/output of /api/v1/accounts/10 is undocumented","No example requests or responses are available anywhere in the crawled material","The broader platform lists many endpoints but none have documented schemas"],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/10","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/10","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, but there is no OpenAPI spec, no documentation, no request/response schema, and all doc pages are empty stubs. The purpose of the /api/v1/accounts/10 endpoint specifically is unclear beyond the generic label 'Premium API 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'/request':13,28 '0.02':12,27,62,113,168 '000':102 '0x8335':107 '20':101 '2913':108 '300':128 '402':96 '402 payment api' '6':117 'accept':133 'access':92 'across':45 'actual':190 'advertis':142 'ai':48 'analysi':146 'analyt':47 'api':5,20,37,74,91 'application/json':138 'base':8,23,70,103,110 'base network api' 'beyond':173 'broader':140 'call':4,19 'caller':203 'categori':56 'challeng':97 'classif':149 'commit':81 'connect':186 'convers':161 'data':46 'decim':118 'discov':209 'document':172,199 'embed':150 'empti':179 'enabl':36 'endpoint':44,58,85,132,143,195 'equal':112 'essenti':178 'estim':158 'exact':124 'exchang':153 'expect':211 'experi':207 'feed':152 'financ':51 'format':213 'gas':157 'generat':163 'geocod':159 'given':114 'howev':171 'http':134 'http-post' 'infrastructur':54 'input':212 'json-response' 'key':75 'land':175 'learn':50 'limit':78 'list':88 'low payment fee' 'lowpaymentfee.com':31 'machin':49 'micropayment api' 'need':205 'network':9,24,71 'no-api-key' 'offer':40 'openapi':201 'page':176,183 'paid':65 'pay':2,17 'pay per call api' 'pay-per-cal':1,16 'pay-per-request' 'payment':119 'per':3,18,63 'platform':6,21,38,141 'point':170 'post':135 'premium':90 'price':60,151,169 'quot':156 'rate':77,154 'request':64,98 'request/response':191 'requir':82 'respons':215 'return':94,137 'schema':192 'scheme':125 'second':129 'sentiment':145 'show':185 'spec':202 'specif':84 'structur':216 'sub':182 'sub-pag':181 'summar':148 'text':147 'timeout':130 'token':155 'unit':104 'unknown':197 'usdc':15,30,67,106,115 'usdc api' 'usdc-base-network' 'util':55 'valid':160 'varieti':42 'via':10,25,121 'wallet':187 'web3':52 'without':198 'x402':11,26,35,123 'x402 api' 'x402-enabled':34 'x402-payment'","prices":[{"id":"c08c9920-1dde-4192-ad78-46dff5a8351d","listingId":"54a1c98d-3bda-4bf4-b362-0d889ff698ed","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/10","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:39:12.947Z"}],"sources":[{"listingId":"54a1c98d-3bda-4bf4-b362-0d889ff698ed","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/10","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:39:12.947Z","lastSeenAt":"2026-04-24T21:02:46.511Z"}],"details":{"listingId":"54a1c98d-3bda-4bf4-b362-0d889ff698ed","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/10 \\\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":"All endpoints priced at $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 for /api/v1/accounts/10 requests maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/10"},{"claim":"Platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium API data without traditional API key registration","Making one-off paid API calls settled in USDC on Base","Agent-driven workflows that need keyless, pay-as-you-go API access"],"bestFor":["Developers wanting frictionless pay-per-call API access without subscriptions","AI agents that can settle x402 payments autonomously on Base","Users who prefer crypto-native micropayments over traditional billing"],"notFor":["Users who need detailed API documentation or OpenAPI specs before integrating","High-volume consumers who would benefit from bulk pricing or subscriptions","Developers who cannot transact in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:39.546Z"},"updatedAt":"2026-04-24T21:02:46.511Z"}}