{"id":"6592fed2-a604-4ba5-b806-625141b1bedf","shortId":"mpHyqp","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/80` is listed as \"Premium API Access\" and charges up to 20,000 base units of USDC (i.e., $0.02 per call, since USDC uses 6 decimals). No API keys, rate limits, or upfront commitments are required — 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 functionality behind the `/api/v1/wire/80` endpoint is not documented beyond the generic \"Premium API Access\" label, so its exact behavior is unclear.\n\nPayment settles to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using USDC (`0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) on Base. The endpoint is live and returns a proper 402 challenge. Documentation pages (docs, pricing, README) all render only a \"Connect wallet\" prompt with no substantive content, so detailed request/response schemas are unavailable.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","no-api-key","premium-api-access"],"categories":["api-platform","crypto"],"synonyms":["low payment fee","x402 api","pay per call api","usdc api","base network api","micropayment api","402 payment api"],"warnings":["The specific functionality of /api/v1/wire/80 is not documented — 'Premium API Access' is the only description available.","All documentation pages (/docs, /pricing, /README, /api) return only a 'Connect wallet' prompt with no substantive content.","No request body schema or response schema is available, so callers cannot know what to send or what to expect back.","The platform lists many API categories (AI, finance, data, etc.) but it is unclear which, if any, this specific endpoint maps to."],"endpointUrl":"https://lowpaymentfee.com/api/v1/wire/80","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/80","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge, but the actual functionality behind '/api/v1/wire/80' is undocumented. All documentation pages render only 'Connect wallet' with no content. No request/response schema, no examples, and no description of what the endpoint actually does beyond the generic 'Premium API Access' 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'/request':13,28,155 '0.02':12,27,74,154 '000':68 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':186 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':189 '20':67 '402':200 '402 payment api' '6':80 'accept':46 'access':62,174 'address':185 'advertis':109 'ai':121 'analysi':125 'analyt':115 'api':5,20,38,61,83,111,173 'attach':94 'base':8,23,51,69,191 'base network api' 'behavior':179 'behind':162 'beyond':169 'broader':107 'call':4,19,76 'caller':92 'categori':112 'challeng':201 'charg':64 'classif':128 'commit':89 'connect':211 'content':217 'convers':145 'data':114,118 'decim':81 'detail':219 'doc':204 'document':168,202 'embed':129 'endpoint':55,148,165,193 'estim':139 'exact':178 'exchang':134 'export':119 'feed':133 'financ':130 'function':161 'gas':138 'generat':146 'generic':171 'geocod':143 'header':99 'howev':158 'i.e':73 'includ':113 'infrastructur':141 'insight':120 'key':84 'label':175 'learn':123 'limit':86 'list':58,150 'live':195 'low payment fee' 'lowpaymentfee.com':31 'machin':122 'metric':116 'micropayment api' 'multipl':110 'network':9,24,52 'no-api-key' 'page':203 'pay':2,17,35 'pay per call api' 'pay-per-cal':1,16 'pay-per-request':34 'payment':48,98,104,182 'per':3,18,36,75 'platform':6,21,39,108 'point':157 'premium':60,172 'premium-api-access' 'price':132,156,205 'prompt':213 'proof':105 'proper':199 'protocol':44 'quot':137 'rate':85,135 'readm':206 'render':208 'report':117 'request':37 'request/response':220 'requir':91 'return':197 'schema':221 'sentiment':124 'settl':183 'simpli':93 'sinc':77 'specif':54,160 'substant':216 'summar':127 'text':126 'token':136 'unavail':223 'unclear':181 'unit':70 'upfront':88 'usdc':15,30,47,72,78,188 'usdc api' 'usdc-base' 'use':41,79,187 'util':142 'valid':102,144 'via':10,25 'wallet':212 'web3':131 'x':97 'x-payment':96 'x402':11,26,43,103 'x402 api' 'x402-payment'","prices":[{"id":"dbc00f79-707e-4c13-9dc3-7205330cfafc","listingId":"6592fed2-a604-4ba5-b806-625141b1bedf","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/80","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:29:05.890Z"}],"sources":[{"listingId":"6592fed2-a604-4ba5-b806-625141b1bedf","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wire/80","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:05.890Z","lastSeenAt":"2026-04-22T18:04:39.815Z"}],"details":{"listingId":"6592fed2-a604-4ba5-b806-625141b1bedf","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wire/80 \\\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":"Endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/wire/80"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/wire/80"},{"claim":"Platform lists API categories including Data & Analytics, AI & ML, Finance & Web3, and Infrastructure","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic access to a premium API endpoint with per-call USDC micropayments","Agent-driven workflows that need keyless, on-demand API access settled on Base","Testing x402 protocol integrations with a low-cost live endpoint"],"bestFor":["Developers experimenting with x402 payment protocol","AI agents that need frictionless pay-per-use API access without credentials","Low-volume callers who want no subscription or minimum commitment"],"notFor":["Users who need detailed API documentation or well-defined schemas before integrating","High-volume production workloads where per-call crypto settlement overhead matters","Callers without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:30.293Z"},"updatedAt":"2026-04-22T18:04:39.815Z"}}