{"id":"40523953-226a-4730-ae92-75d0d209a2f6","shortId":"pXqQz2","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/wire/182` is listed as \"Premium API Access\" and returns a 402 challenge requesting up to 20,000 base units of USDC (i.e., $0.02 given USDC's 6 decimals) 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 lowpaymentfee.com site 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 priced at $0.02 per request and settle via USDC on Base.\n\nHowever, the specific functionality behind `/api/v1/wire/182` (\"Premium API Access\") is not documented. The crawled docs, pricing, and README pages all returned only a \"Connect wallet\" prompt with no additional content. There is no OpenAPI schema, no request/response examples, and no description of what data or service this particular endpoint returns. Prospective callers should be aware that the actual behavior of this endpoint is unknown from available documentation.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","no-api-key","http-post"],"categories":["api-platform","crypto"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","premium API access","crypto-paid API"],"warnings":["The actual functionality of /api/v1/wire/182 ('Premium API Access') is completely undocumented.","All documentation pages (docs, pricing, README, api) returned only 'Connect wallet' with no usable content.","No OpenAPI schema or request/response examples are available.","The endpoint name 'wire/182' is opaque and does not indicate what service it provides."],"endpointUrl":"https://lowpaymentfee.com/api/v1/wire/182","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/wire/182","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation of what the endpoint actually does, no OpenAPI schema, no request/response examples, and the docs/pricing/README pages are all empty beyond a wallet-connect prompt. The listing is effectively a 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'/request':13,28 '0.02':12,27,78,155 '000':72 '20':71 '402':66 '6':82 'Base network API' 'USDC micropayment API' 'accept':46 'access':62,97,172 'across':114 'actual':221 'addit':192 'advertis':88 'ai':124 'analysi':128 'analyt':118 'api':5,20,38,61,90,171 'attach':100 'avail':229 'awar':218 'base':8,23,51,73,163 'behavior':222 'behind':168 'broader':109 'call':4,19,85 'caller':215 'categori':116 'challeng':67 'classif':131 'connect':187 'content':193 'convers':148 'crawl':177 'crypto-paid API' 'data':117,121,207 'decim':83 'descript':204 'doc':178 'document':175,230 'embed':132 'endpoint':55,113,151,212,225 'estim':142 'exampl':201 'exchang':137 'export':122 'feed':136 'financ':133 'four':115 'function':167 'gas':141 'generat':149 'geocod':146 'given':79 'header':104 'howev':164 'http-post' 'i.e':77 'infrastructur':144 'insight':123 'instant':96 'key':91 'learn':126 'limit':94 'list':58 'lowpaymentfee' 'lowpaymentfee.com':31,110 'machin':125 'metric':119 'network':9,24,52 'no-api-key' 'offer':112 'openapi':197 'page':182 'particular':211 'pay':2,17,35 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request':34 'payment':48,103 'per':3,18,36,84,156 'platform':6,21,39,87 'premium':60,170 'premium API access' 'price':135,153,179 'prompt':189 'prospect':214 'protocol':44 'quot':140 'rate':93,138 'readm':181 'report':120 'request':37,68,107,157 'request/response':200 'return':64,184,213 'schema':198 'sentiment':127 'servic':209 'settl':159 'simpli':99 'site':111 'specif':54,166 'summar':130 'text':129 'token':139 'unit':74 'unknown':227 'usdc':15,30,47,76,80,161 'usdc-base' 'use':41 'util':145 'valid':147 'via':10,25,160 'wallet':188 'web3':134 'x402':11,26,43,102 'x402 API' 'x402-payment'","prices":[{"id":"cad2ede1-6764-4a04-8b7c-02a9019dc445","listingId":"40523953-226a-4730-ae92-75d0d209a2f6","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/wire/182","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:28:57.989Z"}],"sources":[{"listingId":"40523953-226a-4730-ae92-75d0d209a2f6","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wire/182","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:28:57.989Z","lastSeenAt":"2026-04-22T18:32:46.214Z"}],"details":{"listingId":"40523953-226a-4730-ae92-75d0d209a2f6","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wire/182 \\\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 challenge requesting up to 20,000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base network.","source_url":"https://lowpaymentfee.com/api/v1/wire/182"},{"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 endpoints across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categories.","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing paid API endpoints without traditional API key registration","Making micropayment-gated API calls settled in USDC on Base","Agent-driven workflows that need permissionless, per-call API access"],"bestFor":["Developers who want to pay per request without subscriptions or API keys","AI agents that can attach x402 payment headers autonomously","Users already holding USDC on the Base network"],"notFor":["Users who need detailed documentation or OpenAPI specs before integrating","Anyone without USDC on the Base network or an x402-compatible client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:30.651Z"},"updatedAt":"2026-04-22T18:32:46.214Z"}}