{"id":"30725415-32a8-40e6-a856-6fa8c371a54c","shortId":"BKsZ5s","kind":"x402","title":"Pay-per-request API platform on Base via x402 — $0.02/call for data, AI, finance, and utility endpoints.","tagline":"Pay-per-request API platform on Base via x402 — $0.02/call for data, AI, finance, and utility endpoints.","description":"lowpaymentfee.com is an x402-enabled API platform that offers a broad catalog of pay-per-request 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 priced at $0.02 per request and settle in USDC on the Base network.\n\nThe specific endpoint at `/api/v1/orders/47` 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. Payment is made via the x402 protocol with an `exact` scheme, meaning a fixed per-request charge. The endpoint accepts POST requests and returns `application/json`. No API keys or rate limits are advertised — access is gated entirely by the x402 payment header.\n\nDocumentation beyond the landing page is extremely sparse. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI spec, no request/response schema documentation, and no examples of what the `/api/v1/orders/47` endpoint actually returns. The purpose of this specific orders endpoint is unclear from the available material — it may be a demo or placeholder rather than a production resource.","tags":[],"capabilities":["x402-payment","pay-per-request","usdc-settlement","base-network","json-response","no-api-key","post-method"],"categories":["api-platform","finance","llm","geo","data"],"synonyms":["x402 API","micropayment API","pay-per-call API","USDC API","Base network API","lowpaymentfee","low payment fee"],"warnings":["No OpenAPI spec or request/response schema available for this endpoint","Documentation pages (/docs, /api, /pricing, /README) contain no substantive content — only 'Connect wallet' prompts","The purpose and expected input/output of /api/v1/orders/47 ('Premium API Access') is not documented anywhere","The broader catalog lists many endpoints but none have documented schemas or examples"],"endpointUrl":"https://lowpaymentfee.com/api/v1/orders/47","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/47","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 documentation is essentially nonexistent beyond the landing page. There is no OpenAPI spec, no request/response schema, no examples, and the specific purpose of /api/v1/orders/47 is unclear. The docs/pricing/README pages are all blank wallet-connect 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'/call':12,31 '0.02':11,30,99,136 '000':130 '20':129 '402':124 'Base network API' 'USDC API' 'accept':159 'access':120,173 'across':58 'actual':225 'advertis':172 'ai':15,34,68 'analysi':72 'analyt':62 'api':5,24,45,119,166,192 'application/json':164 'avail':238 'base':8,27,108,131 'base-network' 'beyond':183 'broad':50 'call':138 'catalog':51 'categori':60 'challeng':125 'charg':156 'classif':75 'connect':201 'content':207 'convers':92 'data':14,33,61,65 'demo':244 'doc':191 'document':182,216 'embed':76 'enabl':44 'endpoint':19,38,57,95,112,158,224,233 'entir':176 'estim':86 'exact':148 'exampl':219 'exchang':81 'export':66 'extrem':188 'feed':80 'financ':16,35,77 'fix':152 'four':59 'gas':85 'gate':175 'generat':93 'geocod':90 'header':181 'i.e':135 'infrastructur':88 'insight':67 'json-response' 'key':167 'land':185 'learn':70 'limit':170 'list':116 'low payment fee' 'lowpaymentfee' 'lowpaymentfee.com':39 'machin':69 'made':141 'materi':239 'may':241 'mean':150 'metric':63 'micropayment API' 'network':109 'no-api-key' 'offer':48 'openapi':211 'order':232 'page':186,196 'pay':2,21,54 'pay-per-call API' 'pay-per-request':1,20,53 'payment':139,180 'per':3,22,55,100,137,154 'per-request':153 'placehold':246 'platform':6,25,46 'post':160 'post-method' 'premium':118 'price':79,97,193 'product':250 'prompt':203 'protocol':145 'purpos':228 'quot':84 'rate':82,169 'rather':247 'readm':195 'render':198 'report':64 'request':4,23,56,101,126,155,161 'request/response':214 'resourc':251 'return':122,163,226 'schema':215 'scheme':149 'sentiment':71 'settl':103 'spars':189 'spec':212 'specif':111,231 'substant':206 'summar':74 'text':73 'token':83 'unclear':235 'unit':132 'usdc':105,134 'usdc-settlement' 'util':18,37,89 'valid':91 'via':9,28,142 'wallet':202 'web3':78 'x402':10,29,43,144,179 'x402 API' 'x402-enabled':42 'x402-payment'","prices":[{"id":"e4f5d0d1-e841-45b7-b712-847154c658d3","listingId":"30725415-32a8-40e6-a856-6fa8c371a54c","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/47","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:35:21.015Z"}],"sources":[{"listingId":"30725415-32a8-40e6-a856-6fa8c371a54c","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/orders/47","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:35:21.015Z","lastSeenAt":"2026-04-23T20:31:58.839Z"}],"details":{"listingId":"30725415-32a8-40e6-a856-6fa8c371a54c","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/orders/47 \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -H \"Content-Type: application/json\"","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/orders/47"},{"claim":"All endpoints are priced at $0.02 per request 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":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/orders/47"},{"claim":"Docs, API, pricing, and README pages render only a 'Connect wallet' prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing data analytics and metrics via per-request micropayments","Running AI inference (sentiment, summarization, classification, embeddings) without subscriptions","Fetching crypto price feeds, exchange rates, and gas estimates on demand","Geocoding, validation, and data conversion utilities with no signup"],"bestFor":["Agents or developers who want instant API access without API keys or accounts","Low-volume or sporadic usage where per-request pricing is more economical than subscriptions","x402-compatible agents that can settle USDC payments on Base automatically"],"notFor":["High-volume production workloads where per-request costs add up quickly","Users who need detailed API documentation, SLAs, or guaranteed uptime","Anyone without a Base-compatible USDC wallet or x402 client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:50.952Z"},"updatedAt":"2026-04-23T20:31:58.839Z"}}