{"id":"e6b12645-17da-441e-a53f-403c3c0d570d","shortId":"GDFkEY","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/34` is listed as \"Premium API Access\" and accepts POST requests. The x402 challenge confirms it is live and requires up to 20,000 base units of USDC (0x8335…), which equals $0.02 per call (USDC uses 6 decimals). No API keys or rate limits are advertised; callers simply attach an X-PAYMENT header with a valid x402 payment proof.\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/request price point. However, the specific endpoint probed here (`/api/v1/wire/34`) does not map to any of the named endpoints on the landing page, and its actual functionality is unclear — the description is simply \"Premium API Access\" with no further documentation.\n\nDocumentation is extremely sparse. The /docs, /api, /pricing, and /README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what data or functionality `/api/v1/wire/34` actually returns. Callers should be aware that the endpoint's behavior is undocumented beyond its payment requirements.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","no-api-key","post-endpoint"],"categories":["api-platform","crypto"],"synonyms":["x402 API","pay per call API","USDC API","Base network API","micropayment API","lowpaymentfee","premium API access"],"warnings":["The specific endpoint /api/v1/wire/34 does not correspond to any named API on the landing page; its actual functionality is unknown.","All documentation pages (/docs, /api, /pricing, /README) render only 'Connect wallet' with no substantive content.","No OpenAPI schema, request format, or response format is documented anywhere.","The platform lists many API categories but it is unclear whether they are all functional or placeholders."],"endpointUrl":"https://lowpaymentfee.com/api/v1/wire/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/wire/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). However, there is no documentation, no OpenAPI schema, no request/response examples, and the actual functionality of /api/v1/wire/34 is completely undocumented. The docs pages are empty beyond a wallet-connect 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'/api/v1/wire/34':56,174,243 '/docs':210 '/pricing':212 '/readme':214 '/request':13,28,165 '0.02':12,27,87,164 '000':79 '0x8335':84 '20':78 '6':92 'Base network API' 'USDC API' 'accept':46,64 'access':62,200 'actual':190,244 'advertis':101,119 'ai':131 'analysi':135 'analyt':125 'api':5,20,38,61,95,121,199 'attach':104 'awar':249 'base':8,23,51,80 'behavior':254 'beyond':257 'broader':117 'call':4,19,89 'caller':102,246 'categori':122 'challeng':69 'classif':138 'confirm':70 'connect':220 'content':226 'convers':155 'data':124,128,240 'decim':93 'descript':195,237 'document':204,205 'embed':139 'endpoint':55,158,171,183,252 'equal':86 'estim':149 'exampl':234 'exchang':144 'export':129 'extrem':207 'feed':143 'financ':140 'function':191,242 'gas':148 'generat':156 'geocod':153 'header':109 'howev':168 'includ':123 'infrastructur':151 'insight':130 'key':96 'land':186 'learn':133 'limit':99 'list':58,160 'live':73 'lowpaymentfee' 'lowpaymentfee.com':31 'machin':132 'map':177 'metric':126 'micropayment API' 'multipl':120 'name':182 'network':9,24,52 'no-api-key' 'openapi':230 'page':187,215 'pay':2,17,35 'pay per call API' 'pay-per-cal':1,16 'pay-per-request':34 'payment':48,108,114,259 'per':3,18,36,88 'platform':6,21,39,118 'point':167 'post':65 'post-endpoint' 'premium':60,198 'premium API access' 'price':142,166 'probe':172 'prompt':222 'proof':115 'protocol':44 'quot':147 'rate':98,145 'render':217 'report':127 'request':37,66 'request/response':233 'requir':75,260 'return':245 'schema':231 'sentiment':134 'simpli':103,197 'spars':208 'specif':54,170 'substant':225 'summar':137 'text':136 'token':146 'unclear':193 'undocu':256 'unit':81 'usdc':15,30,47,83,90 'usdc-base-network' 'use':41,91 'util':152 'valid':112,154 'via':10,25 'wallet':221 'web3':141 'x':107 'x-payment':106 'x402':11,26,43,68,113 'x402 API' 'x402-payment'","prices":[{"id":"2e4d6da8-2c71-434e-bef3-1786d2abee2a","listingId":"e6b12645-17da-441e-a53f-403c3c0d570d","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/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":"2026-04-18T19:29:03.482Z"}],"sources":[{"listingId":"e6b12645-17da-441e-a53f-403c3c0d570d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wire/34","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:03.482Z","lastSeenAt":"2026-04-22T18:04:39.670Z"}],"details":{"listingId":"e6b12645-17da-441e-a53f-403c3c0d570d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wire/34 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The x402 challenge returns maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base network","source_url":"https://lowpaymentfee.com/api/v1/wire/34"},{"claim":"All endpoints are listed at $0.02/request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The platform advertises Data & Analytics, AI & ML, Finance & Web3, and Infrastructure API categories","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages (/docs, /api, /pricing, /README) show only 'Connect wallet' with no further content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Programmatic access to an x402-gated endpoint paying $0.02 per request in USDC on Base","Agent-driven API consumption without pre-registration or API keys","Testing x402 protocol integrations against a live endpoint"],"bestFor":["Developers experimenting with x402 payment protocol","Agents that need keyless, pay-as-you-go API access on Base","Low-cost per-call API consumption settled in USDC"],"notFor":["Users who need detailed documentation or guaranteed SLAs before calling","Anyone without a Base-network USDC wallet or x402-compatible client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:30.423Z"},"updatedAt":"2026-04-22T18:04:39.670Z"}}