{"id":"2e2d871b-3bf3-4af7-8290-b36c957adcd9","shortId":"fY3vqV","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/46` 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, accounts, 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 priced at $0.02 per request. However, the specific functionality behind `/api/v1/wire/46` is not documented beyond the generic label \"Premium API Access,\" and no request/response schemas are provided for this or any other endpoint.\n\nThe platform's documentation pages (`/docs`, `/api`, `/pricing`, `/README`) all returned only a \"Connect wallet\" prompt with no substantive content, so the actual behavior, input parameters, and response format of this endpoint remain unknown. Prospective callers should be aware that there is essentially no documentation describing what this endpoint does or what data it returns.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","no-api-key","json-response"],"categories":["api-marketplace","crypto"],"synonyms":["x402 API","pay-per-call API","USDC API","Base network API","micropayment API","lowpaymentfee"],"warnings":["No documentation available — all doc pages return only 'Connect wallet' with no content","The specific functionality of /api/v1/wire/46 is entirely undocumented","No request or response schema provided","No examples of successful responses available","Cannot verify what data or service this endpoint actually provides"],"endpointUrl":"https://lowpaymentfee.com/api/v1/wire/46","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/46","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live (returns a valid 402 x402 challenge) and pricing is clear ($0.02 USDC on Base), but there is zero documentation on what this endpoint actually does, what inputs it accepts, or what it returns. All doc pages are empty. The label 'Premium API Access' is completely 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'/api/v1/wire/46':58,158 '/docs':186 '/pricing':188 '/readme':189 '/request':12,28 '0.02':11,27,69,150 '000':73 '20':72 '6':79 'Base network API' 'USDC API' 'accept':48 'access':64,168 'account':84 'actual':203 'advertis':89,107 'ai':119 'analysi':123 'analyt':113 'api':5,14,21,30,40,63,82,109,167 'attach':92 'awar':219 'base':8,24,53,74 'behavior':204 'behind':157 'beyond':162 'broader':105 'call':4,20,71 'caller':90,216 'categori':110 'classif':126 'connect':194 'content':200 'convers':143 'cost':66 'data':112,116,233 'decim':80 'describ':226 'document':161,184,225 'embed':127 'endpoint':57,146,180,212,229 'essenti':223 'estim':137 'exchang':132 'export':117 'feed':131 'financ':128 'format':209 'function':156 'gas':136 'generat':144 'generic':164 'geocod':141 'header':97 'howev':153 'includ':111 'infrastructur':139 'input':205 'insight':118 'json-response' 'key':15,31,83 'label':165 'learn':121 'limit':87 'list':60 'lowpaymentfee' 'lowpaymentfee.com':33 'machin':120 'metric':114 'micropayment API' 'multipl':108 'network':54 'no-api-key' 'page':185 'paramet':206 'pay':2,18,37 'pay-per-cal':1,17 'pay-per-call API' 'pay-per-request':36 'payment':50,96,102 'per':3,19,38,70,151 'platform':6,22,41,106,182 'premium':62,166 'price':130,148 'prompt':196 'proof':103 'prospect':215 'protocol':46 'provid':174 'quot':135 'rate':86,133 'remain':213 'report':115 'request':39,152 'request/response':171 'requir':16,32 'respons':208 'return':191,235 'schema':172 'sentiment':122 'simpli':91 'specif':56,155 'substant':199 'summar':125 'text':124 'token':134 'unit':75 'unknown':214 'usdc':49,77 'usdc-base' 'use':43 'util':140 'valid':100,142 'via':9,25 'wallet':195 'web3':129 'x':95 'x-payment':94 'x402':10,26,45,101 'x402 API' 'x402-payment'","prices":[{"id":"23f3c726-22e1-4967-aa5c-b70ae932fe1b","listingId":"2e2d871b-3bf3-4af7-8290-b36c957adcd9","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/46","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:29:13.753Z"}],"sources":[{"listingId":"2e2d871b-3bf3-4af7-8290-b36c957adcd9","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wire/46","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:13.753Z","lastSeenAt":"2026-04-22T12:04:50.632Z"}],"details":{"listingId":"2e2d871b-3bf3-4af7-8290-b36c957adcd9","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wire/46 \\\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 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/wire/46"},{"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"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/wire/46"}],"useCases":["Programmatic access to an undocumented premium API endpoint via x402 micropayments","Agent-driven API consumption without pre-registration or API key management","Testing x402 payment flows on Base with a low-cost endpoint"],"bestFor":["Developers experimenting with x402 protocol integrations","Agents that need keyless, pay-per-call API access on Base","Low-commitment API consumption with no minimums or subscriptions"],"notFor":["Users who need documented request/response schemas before integrating","Production workloads requiring SLA guarantees or support","Anyone needing to understand exactly what data this endpoint returns before paying"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:29.929Z"},"updatedAt":"2026-04-22T12:04:50.632Z"}}