{"id":"48999a49-3913-4336-929e-e914779bdbd6","shortId":"zwk4M4","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/55` is listed as \"Premium API Access\" and charges up to 20,000 base units of USDC (i.e., $0.02) per call. No API keys, rate limits, or upfront commitments are required — each request is paid for individually via an X-PAYMENT header containing a signed payment.\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.\n\nHowever, the specific functionality behind `/api/v1/wire/55` (\"Premium API Access\") is not documented beyond its title. 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-network","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 endpoint"],"warnings":["No documentation available — docs, pricing, and README pages all return only 'Connect wallet' with no content.","The specific functionality of /api/v1/wire/55 ('Premium API Access') is completely undocumented.","No OpenAPI schema, request format, or response examples are available.","No way to determine what data or service this endpoint provides without making a paid request."],"endpointUrl":"https://lowpaymentfee.com/api/v1/wire/55","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/55","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 captured) and pricing is clear ($0.02 USDC on Base), but there is zero documentation on what the endpoint actually does, no request/response schema, 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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'/request':13,28,152 '0.02':12,27,74,151 '000':68 '20':67 'Base network API' 'USDC micropayment API' 'accept':46 'access':62,163 'actual':215 'addit':186 'advertis':106 'ai':118 'analysi':122 'analyt':112 'api':5,20,38,61,78,108,162 'avail':223 'awar':212 'base':8,23,51,69 'behavior':216 'behind':159 'beyond':167 'broader':104 'call':4,19,76 'caller':209 'categori':109 'charg':64 'classif':125 'commit':84 'connect':181 'contain':99 'content':187 'convers':142 'crawl':171 'crypto-paid endpoint' 'data':111,115,201 'descript':198 'doc':172 'document':166,224 'embed':126 'endpoint':55,145,206,219 'estim':136 'exampl':195 'exchang':131 'export':116 'feed':130 'financ':127 'function':158 'gas':135 'generat':143 'geocod':140 'header':98 'howev':155 'http-post' 'i.e':73 'includ':110 'individu':92 'infrastructur':138 'insight':117 'key':79 'learn':120 'limit':81 'list':58,147 'lowpaymentfee' 'lowpaymentfee.com':31 'machin':119 'metric':113 'multipl':107 'network':9,24,52 'no-api-key' 'openapi':191 'page':176 'paid':90 'particular':205 'pay':2,17,35 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request':34 'payment':48,97,102 'per':3,18,36,75 'platform':6,21,39,105 'point':154 'premium':60,161 'premium API access' 'price':129,153,173 'prompt':183 'prospect':208 'protocol':44 'quot':134 'rate':80,132 'readm':175 'report':114 'request':37,88 'request/response':194 'requir':86 'return':178,207 'schema':192 'sentiment':121 'servic':203 'sign':101 'specif':54,157 'summar':124 'text':123 'titl':169 'token':133 'unit':70 'unknown':221 'upfront':83 'usdc':15,30,47,72 'usdc-base-network' 'use':41 'util':139 'valid':141 'via':10,25,93 'wallet':182 'web3':128 'x':96 'x-payment':95 'x402':11,26,43 'x402 API' 'x402-payment'","prices":[{"id":"43860c0b-4472-490b-abd1-c95acb92a5f5","listingId":"48999a49-3913-4336-929e-e914779bdbd6","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/55","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:29:10.735Z"}],"sources":[{"listingId":"48999a49-3913-4336-929e-e914779bdbd6","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wire/55","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:10.735Z","lastSeenAt":"2026-04-22T17:02:24.832Z"}],"details":{"listingId":"48999a49-3913-4336-929e-e914779bdbd6","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wire/55 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <signed-x402-payment-header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns 402 with x402 challenge advertising USDC on Base network at maxAmountRequired 20000 (=$0.02)","source_url":"https://lowpaymentfee.com/api/v1/wire/55"},{"claim":"Platform lists APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories all at $0.02/request","source_url":"https://lowpaymentfee.com"},{"claim":"Platform advertises no API keys, no rate limits, instant access, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/wire/55"}],"useCases":["Paying per request for API access without needing API keys or subscriptions","Programmatic agent-to-service payments using x402 on Base","Accessing premium data or services with USDC micropayments"],"bestFor":["Developers wanting zero-commitment, pay-as-you-go API access","AI agents that can settle x402 payments autonomously on Base","Users who prefer crypto-native billing over traditional API key management"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","Anyone without access to USDC on the Base network","High-volume use cases where per-request pricing may be less economical than bulk plans"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:30.074Z"},"updatedAt":"2026-04-22T17:02:24.832Z"}}