{"id":"a3135592-a22b-484d-bdf4-e877704621b8","shortId":"WEBzFV","kind":"x402","title":"Pay-per-request API platform on Base network via x402 — $0.02/call in USDC.","tagline":"Pay-per-request API platform on Base network via x402 — $0.02/call in USDC.","description":"lowpaymentfee.com is an x402-enabled API platform that offers a broad catalog of endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities. Every endpoint costs $0.02 per request, paid in USDC on the Base network with no API keys, no rate limits, and no commitments required. The specific endpoint at `/api/v1/orders/59` is listed as \"Premium API Access\" and returns `application/json` via POST.\n\nThe platform advertises four endpoint 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 (geocoding, validation, conversion, generation). All endpoints use the x402 payment protocol, settling in USDC (contract `0x8335…2913`) on Base.\n\nNote that the specific `/api/v1/orders/59` endpoint's x402 challenge shows a `maxAmountRequired` of 20000 base units. With USDC's 6 decimals, this equals $0.02, consistent with the site's advertised pricing. Documentation pages beyond the landing page returned only a \"Connect wallet\" prompt, so detailed request/response schemas for individual endpoints are not available.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-api","post-method","no-api-key","no-rate-limit"],"categories":["api-platform","data","llm","finance","infrastructure"],"synonyms":["lowpaymentfee","low payment fee API","x402 API marketplace","pay-per-call API","USDC micropayment API","Base network API","402 payment API"],"warnings":["Documentation pages (/docs, /api, /pricing, /README) all returned only 'Connect wallet' with no usable content.","No OpenAPI or request/response schema available for any endpoint.","The specific endpoint /api/v1/orders/59 is labeled 'Premium API Access' but its exact functionality is undocumented — it does not appear in the landing page's catalog of endpoints.","The breadth of advertised capabilities (AI, analytics, finance, utilities) could not be independently verified."],"endpointUrl":"https://lowpaymentfee.com/api/v1/orders/59","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/orders/59","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.400","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and documentation pages are empty beyond the landing page. The specific purpose of /api/v1/orders/59 ('Premium API Access') is vague and 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'/call':13,28 '0.02':12,27,59,172 '0x8335':145 '20000':162 '2913':146 '402 payment API' '6':168 'Base network API' 'USDC micropayment API' 'access':90 'advertis':98,178 'ai':109 'ai/ml':49 'analysi':113 'analyt':48,103 'api':5,20,37,71,89 'application/json':93 'avail':201 'base':8,23,67,148,163 'beyond':182 'broad':42 'catalog':43 'categori':101 'challeng':157 'classif':116 'commit':78 'connect':189 'consist':173 'contract':144 'convers':132 'cost':58 'data':47,52,102,106 'decim':169 'detail':193 'document':180 'embed':117 'enabl':36 'endpoint':45,57,82,100,135,154,198 'equal':171 'estim':127 'everi':56 'exchang':122 'export':107 'feed':121 'financ':118 'finance/web3':51 'four':99 'gas':126 'generat':133 'geocod':130 'individu':197 'infer':50 'infrastructur':54,129 'insight':108 'json-api' 'key':72 'land':184 'learn':111 'limit':75 'list':86 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':31 'machin':110 'maxamountrequir':160 'metric':104 'network':9,24,68 'no-api-key' 'no-rate-limit' 'note':149 'offer':40 'page':181,185 'paid':62 'pay':2,17 'pay-per-call API' 'pay-per-request':1,16 'payment':139 'per':3,18,60 'platform':6,21,38,97 'post':95 'post-method' 'premium':88 'price':120,179 'prompt':191 'protocol':140 'quot':125 'rate':74,123 'report':105 'request':4,19,61 'request/response':194 'requir':79 'return':92,186 'schema':195 'sentiment':112 'settl':141 'show':158 'site':176 'span':46 'specif':81,152 'summar':115 'text':114 'token':124 'unit':164 'usdc':15,30,64,143,166 'usdc-base' 'use':136 'util':55 'valid':131 'via':10,25,94 'wallet':190 'web3':119 'x402':11,26,35,138,156 'x402 API marketplace' 'x402-enabled':34 'x402-payment'","prices":[{"id":"4ff52375-fd10-4c97-865c-43033717e2a6","listingId":"a3135592-a22b-484d-bdf4-e877704621b8","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/orders/59","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:32:21.939Z"}],"sources":[{"listingId":"a3135592-a22b-484d-bdf4-e877704621b8","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/orders/59","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:32:21.939Z","lastSeenAt":"2026-04-24T06:31:34.924Z"}],"details":{"listingId":"a3135592-a22b-484d-bdf4-e877704621b8","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/orders/59 \\\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 cost $0.02 per request with no API keys, no rate limits, and instant access on Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers endpoints in Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories.","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge for /api/v1/orders/59 shows maxAmountRequired of 20000 base units in USDC on Base, equaling $0.02.","source_url":"https://lowpaymentfee.com/api/v1/orders/59"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base.","source_url":"https://lowpaymentfee.com/api/v1/orders/59"}],"useCases":["Accessing analytics metrics and reports on a per-request basis without subscription","Running AI inference tasks (sentiment, summarization, classification, embeddings) with micropayments","Fetching real-time crypto prices, exchange rates, and gas estimates","Using utility services like geocoding, validation, and data conversion"],"bestFor":["Agents or developers who want instant API access without signup or API keys","Low-volume or bursty workloads where pay-per-request is more economical than a subscription","x402-compatible AI agents that can autonomously pay for API calls on Base"],"notFor":["High-volume production workloads where per-request pricing at $0.02 adds up quickly","Users who need detailed API documentation or OpenAPI schemas before integrating"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:59.878Z"},"updatedAt":"2026-04-24T06:31:34.924Z"}}