{"id":"3926bbc9-692c-49d3-a1ba-c9f7a1fb7252","shortId":"ncX9ss","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 variety of endpoints across data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints are pay-per-request at $0.02 each, settled in USDC on the Base network. No API keys, accounts, or rate limits are required — callers simply attach an x402 payment header to each request.\n\nThe specific endpoint being listed here is `/api/v1/orders/71`, described as \"Premium API Access.\" This particular resource charges up to 20,000 base units of USDC (i.e., $0.02 given USDC's 6 decimals) per call, consistent with the platform's uniform pricing. The endpoint accepts POST requests and returns `application/json` responses. Payment is made to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using the USDC contract on Base (`0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`).\n\nThe platform advertises categories including metrics, reports, data export, insights, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation. However, documentation is extremely thin — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available. The exact functionality behind the `/api/v1/orders/71` endpoint is unclear from the available material.","tags":[],"capabilities":["x402-payment","usdc-base-settlement","pay-per-request","no-api-key","json-response","post-method"],"categories":["api-platform","infrastructure"],"synonyms":["low payment fee","x402 api","micropayment api","pay per call api","base network api","usdc api access","lowpaymentfee"],"warnings":["No OpenAPI specification or schema documentation available","Docs, API, pricing, and README pages all render only 'Connect wallet' with no content","The exact functionality of /api/v1/orders/71 is undocumented — 'Premium API Access' is the only description","No request body schema or response schema is documented anywhere","Cannot verify what data or service this endpoint actually provides"],"endpointUrl":"https://lowpaymentfee.com/api/v1/orders/71","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/71","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no documentation beyond a landing page, no request/response schemas, and no examples. The specific purpose of /api/v1/orders/71 ('Premium API Access') is not explained anywhere. This is effectively a stub 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'/call':13,28 '0.02':12,27,62,116 '000':110 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':145 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':152 '20':109 '6':120 'accept':133 'access':102 'account':74 'across':45 'address':144 'advertis':155 'ai/ml':48 'analysi':164 'analyt':47 'api':5,20,37,72,101,189 'application/json':138 'attach':82 'avail':219,231 'base':8,23,69,111,151 'base network api' 'behind':223 'call':123 'caller':80 'categori':156 'charg':106 'classif':167 'connect':198 'consist':124 'contract':149 'convers':179 'data':46,160 'decim':121 'describ':98 'detail':205 'doc':188 'document':183,214 'embed':168 'enabl':36 'endpoint':44,55,92,132,226 'estim':176 'exact':221 'exampl':218 'exchang':171 'export':161 'extrem':185 'feed':170 'finance/web3':50 'function':222 'gas':175 'generat':181 'geocod':177 'given':117 'header':86 'howev':182 'i.e':115 'includ':157 'infer':49 'infrastructur':52 'insight':162 'json-response' 'key':73 'limit':77 'list':94 'low payment fee' 'lowpaymentfee' 'lowpaymentfee.com':31 'made':142 'materi':232 'metric':158 'micropayment api' 'network':9,24,70 'no-api-key' 'offer':40 'openapi':209 'page':193 'particular':104 'pay':2,17,58 'pay per call api' 'pay-per-request':1,16,57 'payment':85,140 'per':3,18,59,122 'platform':6,21,38,127,154 'post':134 'post-method' 'premium':100 'price':130,169,190 'prompt':200 'quot':174 'rate':76,172 'readm':192 'render':195 'report':159 'request':4,19,60,89,135 'request/response':212 'requir':79 'resourc':105 'respons':139 'return':137 'schema':213 'sentiment':163 'settl':64 'simpli':81 'spec':210 'specif':91 'summar':166 'technic':204 'text':165 'thin':186 'token':173 'unclear':228 'uniform':129 'unit':112 'usag':217 'usdc':15,30,66,114,118,148 'usdc api access' 'usdc-base-settlement' 'use':146 'util':53 'valid':178 'varieti':42 'via':10,25 'wallet':199 'x402':11,26,35,84 'x402 api' 'x402-enabled':34 'x402-payment'","prices":[{"id":"c3521a81-423e-437c-b94f-8309aedba81a","listingId":"3926bbc9-692c-49d3-a1ba-c9f7a1fb7252","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/71","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:35:12.637Z"}],"sources":[{"listingId":"3926bbc9-692c-49d3-a1ba-c9f7a1fb7252","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/orders/71","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:35:12.637Z","lastSeenAt":"2026-04-25T05:32:16.134Z"}],"details":{"listingId":"3926bbc9-692c-49d3-a1ba-c9f7a1fb7252","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/orders/71 \\\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":"Platform charges $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns maxAmountRequired of 20000 base units of USDC (USD Coin) on Base","source_url":"https://lowpaymentfee.com/api/v1/orders/71"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/orders/71"},{"claim":"Platform offers endpoints across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium API data without needing to register or manage API keys","Making one-off API calls with instant USDC micropayments on Base","Agent-driven workflows that need frictionless pay-per-request access"],"bestFor":["Developers wanting zero-friction API access without accounts or subscriptions","AI agents that can settle x402 payments autonomously","Users who prefer crypto micropayments over traditional billing"],"notFor":["Users who need detailed API documentation or OpenAPI specs before integrating","High-volume consumers who want bulk pricing or subscription discounts","Developers who cannot transact in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:51.346Z"},"updatedAt":"2026-04-25T05:32:16.134Z"}}