{"id":"badbfda4-1389-4678-9377-76b33653fcd5","shortId":"h3EAd2","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 a pay-per-request API platform that uses the x402 protocol to accept USDC payments on the Base network. The specific endpoint `/api/v1/transfers/47` is listed as \"Premium API Access\" and costs $0.02 per call (20,000 base units of USDC with 6 decimals). No API keys, rate limits, or upfront commitments are required — each request is paid individually via an X-PAYMENT header.\n\nThe broader platform advertises multiple API categories including 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 listed at the same $0.02 per request price point and settle in USDC on Base.\n\nHowever, the specific functionality of the `/api/v1/transfers/47` endpoint is unclear. The description is simply \"Premium API Access\" with no further documentation about what data or service it returns. The docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no additional technical documentation. Without an OpenAPI schema, request/response examples, or meaningful docs, it is difficult to determine what this particular endpoint actually does.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","http-post"],"categories":["api-platform","payments"],"synonyms":["x402 API","pay-per-call API","USDC API","Base network API","micropayment API","lowpaymentfee","premium API access"],"warnings":["The specific functionality of /api/v1/transfers/47 is undocumented — 'Premium API Access' is the only description available.","No OpenAPI schema, request body format, or response examples are provided.","All documentation pages (docs, pricing, API, README) render only a 'Connect wallet' prompt with no technical content.","The endpoint path '/transfers/47' suggests a resource-specific route, but what 'transfer 47' refers to is unknown."],"endpointUrl":"https://lowpaymentfee.com/api/v1/transfers/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/transfers/47","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (returns a valid 402 x402 challenge), and pricing is clear at $0.02/request in USDC on Base. However, there is no documentation, no OpenAPI schema, no request/response examples, and the actual functionality of this specific endpoint (/api/v1/transfers/47) is entirely undocumented. The docs pages render only a wallet-connect prompt with no 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'/request':13,28 '0.02':12,27,65,146 '000':69 '20':68 '6':75 'Base network API' 'USDC API' 'accept':46 'access':62,173 'actual':221 'addit':200 'advertis':101 'ai':113 'analysi':117 'analyt':107 'api':5,20,38,61,78,103,172,189 'base':8,23,51,70,156 'base-network' 'broader':99 'call':4,19,67 'categori':104 'classif':120 'commit':84 'connect':195 'convers':137 'cost':64 'data':106,110,180 'decim':76 'descript':168 'determin':216 'difficult':214 'doc':186,211 'document':177,202 'embed':121 'endpoint':55,140,164,220 'estim':131 'exampl':208 'exchang':126 'export':111 'feed':125 'financ':122 'function':160 'gas':130 'generat':138 'geocod':135 'header':97 'howev':157 'http-post' 'includ':105 'individu':91 'infrastructur':133 'insight':112 'key':79 'learn':115 'limit':81 'list':58,142 'lowpaymentfee' 'lowpaymentfee.com':31 'machin':114 'meaning':210 'metric':108 'micropayment API' 'multipl':102 'network':9,24,52 'no-api-key' 'openapi':205 'page':190 'paid':90 'particular':219 'pay':2,17,35 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request':34 'payment':48,96 'per':3,18,36,66,147 'platform':6,21,39,100 'point':150 'premium':60,171 'premium API access' 'price':124,149,187 'prompt':197 'protocol':44 'quot':129 'rate':80,127 'render':192 'report':109 'request':37,88,148 'request/response':207 'requir':86 'return':184 'schema':206 'sentiment':116 'servic':182 'settl':152 'simpli':170 'specif':54,159 'summar':119 'technic':201 'text':118 'token':128 'unclear':166 'unit':71 'upfront':83 'usdc':15,30,47,73,154 'usdc-settlement' 'use':41 'util':134 'valid':136 'via':10,25,92 'wallet':196 'web3':123 'without':203 'x':95 'x-payment':94 'x402':11,26,43 'x402 API' 'x402-payment'","prices":[{"id":"e1b65669-e611-4fdc-beb2-2f5855042ed3","listingId":"badbfda4-1389-4678-9377-76b33653fcd5","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/transfers/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":"2026-04-18T19:27:54.894Z"}],"sources":[{"listingId":"badbfda4-1389-4678-9377-76b33653fcd5","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transfers/47","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:27:54.894Z","lastSeenAt":"2026-04-22T04:02:12.622Z"}],"details":{"listingId":"badbfda4-1389-4678-9377-76b33653fcd5","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transfers/47 \\\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":"The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 in USDC (asset 0x8335…) on Base network","source_url":"https://lowpaymentfee.com/api/v1/transfers/47"},{"claim":"All endpoints are 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":"The platform offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Paying per request for API access without needing API keys or subscriptions","Programmatic agent-to-service payments using x402 on Base","Accessing utility or data endpoints with USDC micropayments"],"bestFor":["Developers wanting zero-commitment pay-per-use API access","AI agents that can settle x402 payments autonomously","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users who need detailed API documentation before integrating","High-volume consumers who would benefit from bulk pricing or subscriptions","Anyone without access to USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:33.728Z"},"updatedAt":"2026-04-22T04:02:12.622Z"}}