{"id":"74524cd7-15dc-4db6-8bec-84fd5debe31b","shortId":"6xvKvt","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/62` 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 (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913, which has 6 decimals), equating to $0.02 per call. The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.\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. Documentation pages (docs, pricing, README) appear to require a wallet connection and contain no substantive content in the crawl. The exact functionality of the `/api/v1/customers/62` endpoint is unclear from available materials; the name \"Premium API Access\" is generic and no input/output schema details are provided beyond the x402 challenge metadata.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","json-response","post-method"],"categories":["api-platform","data"],"synonyms":["low payment fee","x402 api","micropayment api","pay per call api","usdc api","base network api","402 payment api"],"warnings":["The exact purpose and response format of /api/v1/customers/62 is unknown — 'Premium API Access' is a generic label with no further documentation.","All documentation pages (docs, pricing, README) returned only 'Connect wallet' with no substantive content.","No OpenAPI spec, input schema, or example responses are available.","The endpoint path '/api/v1/customers/62' suggests it may return customer-specific data; unclear if this is demo/sample data or a real resource."],"endpointUrl":"https://lowpaymentfee.com/api/v1/customers/62","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/62","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 documentation, no input/output schema, and no explanation of what the /api/v1/customers/62 endpoint actually returns. The docs, pricing, and README pages are all behind a wallet-connect gate with no crawlable 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'/request':13,28 '0.02':12,27,62,127,171 '000':114 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':136 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':120 '20':113 '300':139 '402 payment api' '6':123 'access':100,209 'account':74 'across':45 'address':135 'advertis':109,145 'ai/ml':48 'analysi':149 'analyt':47 'api':5,20,37,72,99,208 'appear':179 'application/json':103 'asset':119 'attach':82 'avail':203 'base':8,23,69,115 'base network api' 'base-network' 'beyond':219 'broader':143 'call':4,19,129 'caller':80 'challeng':108,222 'classif':152 'connect':184 'contain':186 'content':189 'convers':164 'crawl':192 'data':46 'decim':124 'detail':216 'doc':176 'document':174 'embed':153 'enabl':36 'endpoint':44,55,92,146,199 'equat':125 'estim':161 'exact':194 'exchang':156 'feed':155 'finance/web3':50 'function':195 'gas':160 'generat':166 'generic':211 'geocod':162 'header':86 'infer':49 'infrastructur':52 'input/output':214 'json-response' 'key':73 'limit':77 'list':96 'low payment fee' 'lowpaymentfee.com':31 'materi':204 'maxamountrequir':111 'metadata':223 'micropayment api' 'name':206 'network':9,24,70 'no-api-key' 'offer':40 'page':175 'pay':2,17,58 'pay per call api' 'pay-per-cal':1,16 'pay-per-request':57 'payment':85,131 'per':3,18,59,128 'platform':6,21,38,144 'point':173 'post':105 'post-method' 'premium':98,207 'price':154,172,177 'provid':218 'quot':159 'rate':76,157 'readm':178 'request':60,89 'requir':79,181 'return':102 'schema':215 'second':140 'sent':133 'sentiment':148 'settl':64 'simpli':81 'specif':91 'substant':188 'summar':151 'text':150 'timeout':141 'token':158 'unclear':201 'unit':116 'usdc':15,30,66,118 'usdc api' 'usdc-settlement' 'util':53 'valid':163 'varieti':42 'via':10,25,104 'wallet':183 'x402':11,26,35,84,107,221 'x402 api' 'x402-enabled':34 'x402-payment'","prices":[{"id":"fc7c13c1-84d9-438a-8e53-f3c57484520a","listingId":"74524cd7-15dc-4db6-8bec-84fd5debe31b","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/62","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:37:30.000Z"}],"sources":[{"listingId":"74524cd7-15dc-4db6-8bec-84fd5debe31b","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/customers/62","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:37:30.000Z","lastSeenAt":"2026-04-25T00:03:33.837Z"}],"details":{"listingId":"74524cd7-15dc-4db6-8bec-84fd5debe31b","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/customers/62 \\\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, no API keys, no rate limits, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns maxAmountRequired of 20000 base units of USDC (6 decimals = $0.02) on Base network","source_url":"https://lowpaymentfee.com/api/v1/customers/62"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/customers/62"},{"claim":"Platform offers endpoints across data/analytics, AI/ML, finance/Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium data or customer records via a single pay-per-call request","Agent-driven API consumption without pre-registration or API key management","Programmatic access to various utility, AI, and finance endpoints at low per-request cost"],"bestFor":["AI agents needing frictionless, keyless API access","Developers who want pay-as-you-go pricing without subscriptions","Low-volume or bursty workloads where per-request billing is economical"],"notFor":["High-volume production workloads where per-request fees add up quickly","Users who need detailed documentation or guaranteed SLAs before integrating"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:44.774Z"},"updatedAt":"2026-04-25T00:03:33.837Z"}}