{"id":"96faff4a-6592-4cc1-9e3d-cd70c9c666d0","shortId":"9zSXZp","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/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 at `/api/v1/customers/8` is listed as \"Premium API Access\" and returns `application/json` via POST. Its x402 challenge advertises a maxAmountRequired of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. The broader platform advertises additional endpoints including 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.\n\nDocumentation is extremely sparse: the /docs, /pricing, /api, and /README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawled material. The actual behavior and response format of the `/api/v1/customers/8` endpoint (and the other listed endpoints) cannot be determined from available information.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","json-api","no-api-key","data-analytics","ai-inference","finance-data","utility-services"],"categories":["api-platform","data","llm"],"synonyms":["low payment fee","x402 api","micropayment api","pay per call api","USDC api","base network api","crypto payment api"],"warnings":["No OpenAPI spec or schema documentation available","All doc pages (/docs, /pricing, /api, /README) render only 'Connect wallet' with no content","The specific endpoint /api/v1/customers/8 has a generic 'Premium API Access' description — its actual purpose and response format are undocumented","Request body schema and response schema are completely unknown","The broader platform lists many endpoints but none have documented input/output contracts"],"endpointUrl":"https://lowpaymentfee.com/api/v1/customers/8","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/customers/8","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI spec, no documented request/response schemas, no examples, and all documentation pages render only a wallet-connect prompt. The actual functionality of /api/v1/customers/8 is unknown beyond its title 'Premium API 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'/api/v1/customers/8':94,212 '/docs':169 '/pricing':170 '/readme':173 '/request':13,28 '0.02':12,27,62,125,161 '000':114 '0x8335':119 '20':113 '2913':120 '6':129 'USDC api' 'access':100 'account':74 'across':45 'actual':205 'addit':135 'advertis':109,134 'ai-inference' 'ai/ml':48 'analysi':139 'analyt':47 'api':5,20,37,72,99 'application/json':103 'attach':82 'avail':199,223 'base':8,23,69,115,122 'base network api' 'behavior':206 'broader':132 'call':4,19 'caller':80 'cannot':219 'challeng':108 'classif':142 'connect':179 'content':185 'convers':154 'crawl':202 'crypto payment api' 'data':46 'data-analytics' 'decim':130 'determin':221 'document':164,194 'embed':143 'enabl':36 'endpoint':44,55,92,136,213,218 'equal':124 'estim':151 'exampl':198 'exchang':146 'extrem':166 'feed':145 'finance-data' 'finance/web3':50 'format':209 'gas':150 'generat':156 'geocod':152 'given':126 'header':86 'includ':137 'infer':49 'inform':224 'infrastructur':52 'json-api' 'key':73 'limit':77 'list':96,217 'low payment fee' 'lowpaymentfee.com':31 'materi':203 'maxamountrequir':111 'micropayment api' 'network':9,24,70 'no-api-key' 'offer':40 'openapi':189 'page':174 'pay':2,17,58 'pay per call api' 'pay-per-cal':1,16 'pay-per-request':57 'payment':85 'per':3,18,59 'platform':6,21,38,133 'point':163 'post':105 'premium':98 'price':144,162 'prompt':181 'quot':149 'rate':76,147 'render':176 'request':60,89 'request/response':192 'requir':79 'respons':208 'return':102 'schema':193 'sentiment':138 'settl':64 'simpli':81 'spars':167 'spec':190 'specif':91 'summar':141 'text':140 'token':148 'unit':116 'usag':197 'usdc':15,30,66,118,127 'usdc-base-network' 'util':53 'utility-services' 'valid':153 'varieti':42 'via':10,25,104 'wallet':180 'x402':11,26,35,84,107 'x402 api' 'x402-enabled':34 'x402-payment'","prices":[{"id":"26c06f81-44ba-4156-9569-e4a7b35c9c6b","listingId":"96faff4a-6592-4cc1-9e3d-cd70c9c666d0","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/customers/8","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:36:12.480Z"}],"sources":[{"listingId":"96faff4a-6592-4cc1-9e3d-cd70c9c666d0","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/customers/8","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:36:12.480Z","lastSeenAt":"2026-04-24T03:02:42.854Z"}],"details":{"listingId":"96faff4a-6592-4cc1-9e3d-cd70c9c666d0","quickStartSnippet":"# x402 endpoint — send a POST with X-PAYMENT header\ncurl -X POST https://lowpaymentfee.com/api/v1/customers/8 \\\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":"x402 challenge returns maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base","source_url":"https://lowpaymentfee.com/api/v1/customers/8"},{"claim":"Platform offers endpoints across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages render only 'Connect wallet' with no further content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing data analytics and reports on a per-request basis without subscriptions","Running AI inference tasks (sentiment, summarization, classification, embeddings) with per-call USDC payments","Fetching financial data like token quotes, exchange rates, and gas estimates","Using utility services like geocoding, validation, and conversion via micropayments"],"bestFor":["Developers who want pay-per-use API access without API key management","Agents and bots that can settle payments in USDC on Base","Users who need low-cost, no-commitment access to a variety of API services"],"notFor":["Users who need detailed API documentation or response schemas before integrating","High-volume consumers who would benefit from bulk pricing or subscription plans","Users who cannot transact in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:48.541Z"},"updatedAt":"2026-04-24T03:02:42.854Z"}}