{"id":"97dd28ed-6924-4c60-8df7-8e0dbafeee01","shortId":"HX2yaS","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/112` is listed as \"Premium API Access\" and returns a standard x402 402 challenge requesting up to 20,000 base units of USDC (0.02 USD) per call. 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.\n\nHowever, the specific functionality behind `/api/v1/wire/112` (\"Premium API Access\") is not documented beyond its title. There is no OpenAPI schema, no request/response examples, and the docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no additional content. The endpoint is confirmed live (returns a valid x402 challenge), but what data or service it actually provides is unclear.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","no-api-key","http-post"],"categories":["api-platform","infrastructure"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","premium API access","crypto-paid API"],"warnings":["The specific functionality of /api/v1/wire/112 ('Premium API Access') is not documented anywhere — it is unclear what data or service this endpoint provides.","All documentation pages (docs, pricing, API, README) render only 'Connect wallet' 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, etc.) but none are documented beyond titles and prices."],"endpointUrl":"https://lowpaymentfee.com/api/v1/wire/112","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/112","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is confirmed live with a valid x402 challenge, but there is no documentation, no OpenAPI schema, no request/response examples, and the actual functionality behind 'Premium API Access' at /api/v1/wire/112 is completely undocumented. All doc pages render only 'Connect wallet' with no 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'/request':13,28,154 '0.02':12,27,79,153 '000':74 '20':73 '402':68 'Base network API' 'USDC micropayment API' 'accept':46 'access':62,165 'actual':214 'addit':196 'advertis':90,108 'ai':120 'analysi':124 'analyt':114 'api':5,20,38,61,84,110,164,185 'attach':93 'base':8,23,51,75 'behind':161 'beyond':169 'broader':106 'call':4,19,82 'caller':91 'categori':111 'challeng':69,207 'classif':127 'confirm':201 'connect':191 'content':197 'convers':144 'crypto-paid API' 'data':113,117,210 'doc':182 'document':168 'embed':128 'endpoint':55,147,199 'estim':138 'exampl':179 'exchang':133 'export':118 'feed':132 'financ':129 'function':160 'gas':137 'generat':145 'geocod':142 'header':98 'howev':157 'http-post' 'includ':112 'infrastructur':140 'insight':119 'key':85 'learn':122 'limit':88 'list':58,149 'live':202 'lowpaymentfee' 'lowpaymentfee.com':31 'machin':121 'metric':115 'multipl':109 'network':9,24,52 'no-api-key' 'openapi':175 'page':186 'pay':2,17,35 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request':34 'payment':48,97,103 'per':3,18,36,81 'platform':6,21,39,107 'point':156 'premium':60,163 'premium API access' 'price':131,155,183 'prompt':193 'proof':104 'protocol':44 'provid':215 'quot':136 'rate':87,134 'render':188 'report':116 'request':37,70 'request/response':178 'return':64,203 'schema':176 'sentiment':123 'servic':212 'simpli':92 'specif':54,159 'standard':66 'summar':126 'text':125 'titl':171 'token':135 'unclear':217 'unit':76 'usd':80 'usdc':15,30,47,78 'usdc-base-network' 'use':41 'util':141 'valid':101,143,205 'via':10,25 'wallet':192 'web3':130 'x':96 'x-payment':95 'x402':11,26,43,67,102,206 'x402 API' 'x402-payment'","prices":[{"id":"fdd9fa3c-d960-4b25-9100-065bdf91145d","listingId":"97dd28ed-6924-4c60-8df7-8e0dbafeee01","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/112","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:28:39.867Z"}],"sources":[{"listingId":"97dd28ed-6924-4c60-8df7-8e0dbafeee01","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wire/112","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:28:39.867Z","lastSeenAt":"2026-04-22T19:32:28.480Z"}],"details":{"listingId":"97dd28ed-6924-4c60-8df7-8e0dbafeee01","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wire/112 \\\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 endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/wire/112"},{"claim":"All endpoints are priced at $0.02/request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The platform advertises categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/wire/112"}],"useCases":["Accessing premium API services with per-request USDC micropayments on Base","Agent-driven workflows that need keyless, pay-as-you-go API access","Programmatic access to data or utility endpoints without subscription commitments"],"bestFor":["Developers wanting zero-commitment, pay-per-use API access","AI agents with x402-compatible wallets on Base","Users who prefer crypto micropayments over API key management"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before purchasing","Anyone without a Base-network USDC wallet","High-volume use cases where per-request pricing may be inefficient compared to bulk plans"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:31.58Z"},"updatedAt":"2026-04-22T19:32:28.480Z"}}