{"id":"080f7aa6-318d-46fe-adfa-d0bb85a3648e","shortId":"MLyztN","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/34` 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. The platform advertises no API keys, no rate limits, and instant access — you simply attach an x402 payment header to each request.\n\nThe broader platform offers 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 listed at the same $0.02/request price point.\n\nThis particular endpoint (`/api/v1/transfers/34`) is labeled \"Premium API Access\" but its actual functionality is not documented beyond that label. The crawled docs, pricing, API, and README pages all returned only a \"Connect wallet\" prompt with no additional content. Without further documentation or an OpenAPI schema, the specific input/output behavior of this endpoint remains unclear.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","no-api-key","http-post"],"categories":["api-platform","crypto"],"synonyms":["low payment fee","x402 api","pay per call api","usdc api","base network api","micropayment api","premium api access"],"warnings":["No OpenAPI or schema documentation available for this endpoint","The endpoint label 'Premium API Access' does not describe what the endpoint actually does","All documentation pages (docs, pricing, README, api) returned only 'Connect wallet' with no useful content","The specific functionality of /api/v1/transfers/34 is unknown — it does not match any of the listed API categories on the homepage"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transfers/34","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/34","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI schema, no documentation of request/response formats, and the docs/pricing/README pages are all empty beyond a wallet connect prompt. The specific purpose of /api/v1/transfers/34 is 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'/request':13,28,152 '0.02':12,27,78,151 '000':72 '20':71 '402':66 'accept':46 'access':62,92,163 'across':108 'actual':166 'addit':191 'advertis':83 'ai':118 'analysi':122 'analyt':112 'api':5,20,38,61,85,162,178 'attach':95 'base':8,23,51,73 'base network api' 'behavior':203 'beyond':171 'broader':104 'call':4,19,80 'categori':110 'challeng':67 'classif':125 'connect':186 'content':192 'convers':142 'crawl':175 'data':111,115 'doc':176 'document':170,195 'embed':126 'endpoint':55,107,145,157,206 'estim':136 'exchang':131 'export':116 'feed':130 'financ':127 'four':109 'function':167 'gas':135 'generat':143 'geocod':140 'header':99 'http-post' 'i.e':77 'infrastructur':138 'input/output':202 'insight':117 'instant':91 'key':86 'label':160,173 'learn':120 'limit':89 'list':58,147 'low payment fee' 'lowpaymentfee.com':31 'machin':119 'metric':113 'micropayment api' 'network':9,24,52 'no-api-key' 'offer':106 'openapi':198 'page':181 'particular':156 'pay':2,17,35 'pay per call api' 'pay-per-cal':1,16 'pay-per-request':34 'payment':48,98 'per':3,18,36,79 'platform':6,21,39,82,105 'point':154 'premium':60,161 'premium api access' 'price':129,153,177 'prompt':188 'protocol':44 'quot':134 'rate':88,132 'readm':180 'remain':207 'report':114 'request':37,68,102 'return':64,183 'schema':199 'sentiment':121 'simpli':94 'specif':54,201 'summar':124 'text':123 'token':133 'unclear':208 'unit':74 'usdc':15,30,47,76 'usdc api' 'usdc-base-network' 'use':41 'util':139 'valid':141 'via':10,25 'wallet':187 'web3':128 'without':193 'x402':11,26,43,97 'x402 api' 'x402-payment'","prices":[{"id":"a6ac8f5f-d162-4f02-9494-e9d3a183d11d","listingId":"080f7aa6-318d-46fe-adfa-d0bb85a3648e","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/34","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:27:44.616Z"}],"sources":[{"listingId":"080f7aa6-318d-46fe-adfa-d0bb85a3648e","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transfers/34","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:27:44.616Z","lastSeenAt":"2026-04-23T00:32:30.341Z"}],"details":{"listingId":"080f7aa6-318d-46fe-adfa-d0bb85a3648e","quickStartSnippet":"# The endpoint requires an x402 payment header with USDC on Base.\n# Using curl, you'd first obtain a payment proof, then:\ncurl -X POST https://lowpaymentfee.com/api/v1/transfers/34 \\\n  -H \"X-PAYMENT: <your-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/transfers/34"},{"claim":"The platform lists endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories, all at $0.02/request","source_url":"https://lowpaymentfee.com"},{"claim":"The platform advertises no API keys, no rate limits, instant access, and Base network settlement","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/transfers/34"}],"useCases":["Programmatic access to API services without managing API keys or subscriptions","Agent-driven workflows that need to pay per call using USDC on Base","Testing x402 payment protocol integrations"],"bestFor":["Developers wanting zero-commitment, pay-as-you-go API access","AI agents that can settle payments via x402 on Base","Users who prefer crypto micropayments over traditional billing"],"notFor":["Users who need detailed API documentation or OpenAPI schemas 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":"2026-02-17T23:13:34.217Z"},"updatedAt":"2026-04-23T00:32:30.341Z"}}