{"id":"48b73a46-1401-423c-bdc7-7e4217c0d5b3","shortId":"ZKJ327","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 broad catalog of endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and utility services. Every endpoint costs $0.02 per request, paid in USDC on the Base network with no API keys, no rate limits, and no commitments required. The specific endpoint at `/api/v1/wire/17` is listed as \"Premium API Access\" and accepts POST requests settled via the x402 exact-payment scheme.\n\nThe platform advertises four categories of APIs: 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 appear to follow the same $0.02 per-call pricing model.\n\nDocumentation is extremely sparse — the /docs, /api, /pricing, and /README pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawled content. The x402 challenge on `/api/v1/wire/17` confirms the endpoint is live, accepting POST with USDC payment on Base, but what this specific \"wire/17\" endpoint actually returns is unknown from the available material.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","no-api-key","post-method","json-response"],"categories":["api-platform","finance","llm","geo"],"synonyms":["low payment fee","x402 api","pay per call api","usdc api","base network api","micropayment api","402 payment api"],"warnings":["No documentation available — /docs, /pricing, /api, and /README all show only 'Connect wallet' with no content","No OpenAPI spec or request/response schema for any endpoint","The purpose of /api/v1/wire/17 ('Premium API Access') is completely undocumented — it is unclear what data or service it provides","Cannot verify that the advertised AI, finance, or utility endpoints actually function as described"],"endpointUrl":"https://lowpaymentfee.com/api/v1/wire/17","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/17","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The x402 challenge confirms the endpoint is live and priced at $0.02 USDC on Base, but there is zero documentation on what /api/v1/wire/17 actually does, no request/response schemas, and no examples. The docs, pricing, and README pages are all empty beyond a wallet-connect prompt. This is effectively a stub 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'/api/v1/wire/17':84,201 '/docs':161 '/pricing':163 '/readme':165 '/request':13,28 '0.02':12,27,59,150 '402 payment api' 'accept':92,207 'access':90 'actual':220 'advertis':105 'ai':117 'ai/ml':49 'analysi':121 'analyt':48,111 'api':5,20,37,71,89,109 'appear':145 'avail':192,226 'base':8,23,67,213 'base network api' 'broad':42 'call':4,19,153 'catalog':43 'categori':107 'challeng':199 'classif':124 'commit':78 'confirm':202 'connect':171 'content':196 'convers':141 'cost':58 'crawl':195 'data':47,52,110,114 'detail':178 'document':156,187 'embed':125 'enabl':36 'endpoint':45,57,82,144,204,219 'estim':135 'everi':56 'exact':100 'exact-pay':99 'exampl':191 'exchang':130 'export':115 'extrem':158 'feed':129 'financ':126 'finance/web3':51 'follow':147 'four':106 'gas':134 'generat':142 'geocod':139 'infer':50 'infrastructur':137 'insight':116 'json-response' 'key':72 'learn':119 'limit':75 'list':86 'live':206 'low payment fee' 'lowpaymentfee.com':31 'machin':118 'materi':227 'metric':112 'micropayment api' 'model':155 'network':9,24,68 'no-api-key' 'offer':40 'openapi':182 'page':166 'paid':62 'pay':2,17 'pay per call api' 'pay-per-cal':1,16 'pay-per-request' 'payment':101,211 'per':3,18,60,152 'per-cal':151 'platform':6,21,38,104 'post':93,208 'post-method' 'premium':88 'price':128,154 'prompt':173 'quot':133 'rate':74,131 'render':168 'report':113 'request':61,94 'request/response':185 'requir':79 'return':221 'schema':186 'scheme':102 'sentiment':120 'servic':55 'settl':95 'span':46 'spars':159 'spec':183 'specif':81,217 'summar':123 'technic':177 'text':122 'token':132 'unknown':223 'usag':190 'usdc':15,30,64,210 'usdc api' 'usdc-base-network' 'util':54,138 'valid':140 'via':10,25,96 'wallet':172 'web3':127 'wire/17':218 'x402':11,26,35,98,198 'x402 api' 'x402-enabled':34 'x402-payment'","prices":[{"id":"00f9face-0a6b-4706-b69c-1903cf59ca76","listingId":"48b73a46-1401-423c-bdc7-7e4217c0d5b3","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/17","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:28:44.736Z"}],"sources":[{"listingId":"48b73a46-1401-423c-bdc7-7e4217c0d5b3","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wire/17","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:28:44.736Z","lastSeenAt":"2026-04-22T15:02:29.039Z"}],"details":{"listingId":"48b73a46-1401-423c-bdc7-7e4217c0d5b3","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wire/17 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\" \\\n  -d '{}'","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"All endpoints cost $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The x402 challenge on /api/v1/wire/17 returns maxAmountRequired of 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, equaling $0.02","source_url":"https://lowpaymentfee.com/api/v1/wire/17"},{"claim":"Platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Paying per-call for analytics, AI inference, or financial data without signing up for an account","Integrating USDC micropayments into agent workflows that need on-demand API access","Accessing geocoding, validation, or conversion utilities with no rate limits"],"bestFor":["Agents or developers who want zero-signup, pay-as-you-go API access","Use cases requiring USDC micropayments on Base L2","Quick prototyping where API key management is undesirable"],"notFor":["Users who need detailed API documentation or guaranteed SLAs","High-volume production workloads where per-request pricing at $0.02 may add up","Anyone unable to transact in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:31.327Z"},"updatedAt":"2026-04-22T15:02:29.039Z"}}