{"id":"4ec54fe7-63d0-4e66-9dd6-78e369d480e8","shortId":"Us54Zc","kind":"x402","title":"Pay-per-call API platform on Base via x402 — $0.02/request, no API keys required.","tagline":"Pay-per-call API platform on Base via x402 — $0.02/request, no API keys required.","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/59` is listed as \"Premium API Access\" and costs up to $0.02 per call (20,000 base units of USDC with 6 decimals). No API keys, rate limits, or upfront commitments are required — callers simply attach an x402 payment header to each request.\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 priced at $0.02 per request.\n\nHowever, the specific functionality behind `/api/v1/wire/59` is not documented beyond the label \"Premium API Access.\" There is no OpenAPI schema, no request/response examples, and the docs, pricing, and README pages all render only a wallet-connect prompt with no additional content. Callers should be aware that the actual behavior of this endpoint is unclear 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 API","Base network API","micropayment API","lowpaymentfee","wire endpoint"],"warnings":["The specific functionality of /api/v1/wire/59 ('Premium API Access') is completely undocumented — it is unclear what data or service it provides.","All documentation pages (/docs, /pricing, /README, /api) returned only a wallet-connect prompt with no usable content.","No OpenAPI schema, no request body schema, and no response examples are available.","The platform lists many endpoint categories (AI, finance, analytics, infrastructure) but none are documented beyond titles and prices."],"endpointUrl":"https://lowpaymentfee.com/api/v1/wire/59","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/59","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (returns a valid 402 x402 challenge) and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, no documentation of what the endpoint actually does, and all doc pages render only a wallet-connect prompt. The listing is effectively a 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'/request':12,28 '0.02':11,27,69,147 '000':73 '20':72 '6':79 'Base network API' 'USDC API' 'accept':48 'access':64,164 'actual':198 'addit':190 'advertis':104 'ai':116 'analysi':120 'analyt':110 'api':5,14,21,30,40,63,82,106,163 'attach':93 'avail':206 'awar':195 'base':8,24,53,74 'behavior':199 'behind':154 'beyond':159 'broader':102 'call':4,20,71 'caller':91,192 'categori':107 'classif':123 'commit':88 'connect':186 'content':191 'convers':140 'cost':66 'data':109,113 'decim':80 'doc':175 'document':158,207 'embed':124 'endpoint':57,143,202 'estim':134 'exampl':172 'exchang':129 'export':114 'feed':128 'financ':125 'function':153 'gas':133 'generat':141 'geocod':138 'header':97 'howev':150 'http-post' 'includ':108 'infrastructur':136 'insight':115 'key':15,31,83 'label':161 'learn':118 'limit':85 'list':60 'lowpaymentfee' 'lowpaymentfee.com':33 'machin':117 'metric':111 'micropayment API' 'multipl':105 'network':54 'no-api-key' 'openapi':168 'page':179 'pay':2,18,37 'pay-per-cal':1,17 'pay-per-call API' 'pay-per-request':36 'payment':50,96 'per':3,19,38,70,148 'platform':6,22,41,103 'premium':62,162 'price':127,145,176 'prompt':187 'protocol':46 'quot':132 'rate':84,130 'readm':178 'render':181 'report':112 'request':39,100,149 'request/response':171 'requir':16,32,90 'schema':169 'sentiment':119 'simpli':92 'specif':56,152 'summar':122 'text':121 'token':131 'unclear':204 'unit':75 'upfront':87 'usdc':49,77 'usdc-base' 'use':43 'util':137 'valid':139 'via':9,25 'wallet':185 'wallet-connect':184 'web3':126 'wire endpoint' 'x402':10,26,45,95 'x402 API' 'x402-payment'","prices":[{"id":"bcc4732e-edd0-4695-a984-90d5f0e4bd69","listingId":"4ec54fe7-63d0-4e66-9dd6-78e369d480e8","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/59","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:29:14.364Z"}],"sources":[{"listingId":"4ec54fe7-63d0-4e66-9dd6-78e369d480e8","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wire/59","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:14.364Z","lastSeenAt":"2026-04-22T17:02:25.010Z"}],"details":{"listingId":"4ec54fe7-63d0-4e66-9dd6-78e369d480e8","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wire/59 \\\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":"Endpoint returns HTTP 402 with x402 challenge requiring USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/wire/59"},{"claim":"maxAmountRequired is 20000 base units of USDC (USD Coin, 6 decimals) = $0.02","source_url":"https://lowpaymentfee.com/api/v1/wire/59"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Payment is to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using USDC contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/wire/59"},{"claim":"Platform lists API categories: Data & Analytics, AI & Machine Learning, Finance & Web3, Infrastructure","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic access to a premium API endpoint with per-request USDC micropayments","Agent-driven workflows that need keyless, pay-as-you-go API access on Base","Testing x402 protocol integrations against a live endpoint"],"bestFor":["Developers experimenting with x402 payment protocol","Agents that can settle USDC on Base for per-call API access","Use cases requiring no signup or API key management"],"notFor":["Users who need detailed API documentation or guaranteed SLAs","Anyone without a Base-network USDC wallet","Production workloads requiring well-documented request/response contracts"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:29.863Z"},"updatedAt":"2026-04-22T17:02:25.010Z"}}