{"id":"5d3d4831-4a1f-4e4a-9dec-31664fbfe611","shortId":"rynXfq","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/196` 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 to access the resource.\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 per request price point and settle in USDC on Base.\n\nHowever, the specific functionality behind `/api/v1/wire/196` (\"Premium API Access\") is not documented beyond its title. The docs, pricing, and README pages all returned only a \"Connect wallet\" prompt with no additional content. Without documentation or example responses, it is unclear what data or service this particular endpoint returns when a valid payment is submitted.","tags":[],"capabilities":["x402-payment","usdc-settlement","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 API"],"warnings":["The specific functionality of /api/v1/wire/196 ('Premium API Access') is entirely undocumented — it is unclear what data or service is returned upon successful payment.","All documentation pages (docs, pricing, README, api) returned only 'Connect wallet' with no usable content.","No OpenAPI schema, no example requests, and no example responses are available.","The endpoint path '/api/v1/wire/196' uses a numeric ID with no explanation of what resource 196 refers to."],"endpointUrl":"https://lowpaymentfee.com/api/v1/wire/196","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/196","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but there is no documentation, no OpenAPI schema, no example requests or responses, and the actual functionality behind 'Premium API Access' at /api/v1/wire/196 is completely undocumented. The docs/pricing/README pages are all blank beyond a wallet connect 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'/request':13,28 '0.02':12,27,79,157 '000':74 '20':73 '402':68 'Base network API' 'USDC micropayment API' 'accept':46 'access':62,106,176 'addit':198 'advertis':90,112 'ai':124 'analysi':128 'analyt':118 'api':5,20,38,61,84,114,175 'attach':93 'base':8,23,51,75,167 'base-network' 'behind':172 'beyond':180 'broader':110 'call':4,19,82 'caller':91 'categori':115 'challeng':69 'classif':131 'connect':193 'content':199 'convers':148 'crypto-paid API' 'data':117,121,209 'doc':184 'document':179,201 'embed':132 'endpoint':55,151,214 'estim':142 'exampl':203 'exchang':137 'export':122 'feed':136 'financ':133 'function':171 'gas':141 'generat':149 'geocod':146 'header':98 'howev':168 'http-post' 'includ':116 'infrastructur':144 'insight':123 'key':85 'learn':126 'limit':88 'list':58,153 'lowpaymentfee' 'lowpaymentfee.com':31 'machin':125 'metric':119 'multipl':113 'network':9,24,52 'no-api-key' 'page':188 'particular':213 'pay':2,17,35 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request':34 'payment':48,97,103,219 'per':3,18,36,81,158 'platform':6,21,39,111 'point':161 'premium':60,174 'premium API access' 'price':135,160,185 'prompt':195 'proof':104 'protocol':44 'quot':140 'rate':87,138 'readm':187 'report':120 'request':37,70,159 'resourc':108 'respons':204 'return':64,190,215 'sentiment':127 'servic':211 'settl':163 'simpli':92 'specif':54,170 'standard':66 'submit':221 'summar':130 'text':129 'titl':182 'token':139 'unclear':207 'unit':76 'usd':80 'usdc':15,30,47,78,165 'usdc-settlement' 'use':41 'util':145 'valid':101,147,218 'via':10,25 'wallet':194 'web3':134 'without':200 'x':96 'x-payment':95 'x402':11,26,43,67,102 'x402 API' 'x402-payment'","prices":[{"id":"c5b697e9-e901-4dea-8fbc-0e735fae2960","listingId":"5d3d4831-4a1f-4e4a-9dec-31664fbfe611","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/196","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:28:54.340Z"}],"sources":[{"listingId":"5d3d4831-4a1f-4e4a-9dec-31664fbfe611","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wire/196","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:28:54.340Z","lastSeenAt":"2026-04-22T18:04:38.896Z"}],"details":{"listingId":"5d3d4831-4a1f-4e4a-9dec-31664fbfe611","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wire/196 \\\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 402 challenge requesting up to 20,000 base units of USDC (asset 0x8335…) on Base network","source_url":"https://lowpaymentfee.com/api/v1/wire/196"},{"claim":"All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium API data without traditional API key signup","Making one-off paid API calls settled in USDC on Base","Agent-driven API consumption with per-request crypto payments"],"bestFor":["Developers who want keyless, pay-as-you-go API access","AI agents that can settle x402 payments autonomously","Users already holding USDC on Base network"],"notFor":["Users who need detailed API documentation before purchasing","Anyone without USDC on Base network or an x402-compatible client","High-volume use cases where per-request pricing may add up"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:30.872Z"},"updatedAt":"2026-04-22T18:04:38.896Z"}}