{"id":"2c710270-8038-4d83-b33b-5cf18f088f96","shortId":"euLFnm","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/45` is listed as \"Premium API Access\" and returns a 402 challenge requesting up to 20,000 base units of USDC (i.e., $0.02) per call. The platform advertises no API keys, no rate limits, and instant access — callers simply attach an X-PAYMENT header with a valid x402 payment proof.\n\nThe broader platform offers endpoints across four categories: 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 `/api/v1/wire/45` endpoint does not appear in the site's public API listing, and no documentation describes what it actually returns. The docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no further content. Without an OpenAPI schema, request/response examples, or any description of the wire/45 endpoint's functionality, it is unclear what data or service this particular endpoint provides.","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 endpoint /api/v1/wire/45 does not appear in the site's public API catalog — its purpose is unknown.","All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no usable content.","No OpenAPI schema or request/response examples are available for this endpoint.","The actual functionality behind 'Premium API Access' is undocumented and cannot be verified."],"endpointUrl":"https://lowpaymentfee.com/api/v1/wire/45","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/45","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is zero documentation on what /api/v1/wire/45 actually does. No OpenAPI schema, no request/response examples, and the docs pages are empty. The endpoint path doesn't match any listed API on the site. This is effectively a stub 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'/request':13,28,156 '0.02':12,27,78,155 '000':72 '20':71 '402':66 'Base network API' 'USDC micropayment API' 'accept':46 'access':62,92 'across':112 'actual':180 'advertis':83 'ai':122 'analysi':126 'analyt':116 'api':5,20,38,61,85,172,186 'appear':166 'attach':95 'base':8,23,51,73 'broader':108 'call':4,19,80 'caller':93 'categori':114 'challeng':67 'classif':129 'connect':192 'content':198 'convers':146 'crypto-paid API' 'data':115,119,218 'describ':177 'descript':207 'doc':183 'document':176 'embed':130 'endpoint':55,111,149,163,211,223 'estim':140 'exampl':204 'exchang':135 'export':120 'feed':134 'financ':131 'four':113 'function':213 'gas':139 'generat':147 'geocod':144 'header':100 'howev':159 'http-post' 'i.e':77 'infrastructur':142 'insight':121 'instant':91 'key':86 'learn':124 'limit':89 'list':58,151,173 'lowpaymentfee' 'lowpaymentfee.com':31 'machin':123 'metric':117 'network':9,24,52 'no-api-key' 'offer':110 'openapi':201 'page':187 'particular':222 'pay':2,17,35 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request':34 'payment':48,99,105 'per':3,18,36,79 'platform':6,21,39,82,109 'point':158 'premium':60 'premium API access' 'price':133,157,184 'prompt':194 'proof':106 'protocol':44 'provid':224 'public':171 'quot':138 'rate':88,136 'render':189 'report':118 'request':37,68 'request/response':203 'return':64,181 'schema':202 'sentiment':125 'servic':220 'simpli':94 'site':169 'specif':54,161 'summar':128 'text':127 'token':137 'unclear':216 'unit':74 'usdc':15,30,47,76 'usdc-base-network' 'use':41 'util':143 'valid':103,145 'via':10,25 'wallet':193 'web3':132 'wire/45':210 'without':199 'x':98 'x-payment':97 'x402':11,26,43,104 'x402 API' 'x402-payment'","prices":[{"id":"3388508c-aa85-44b8-9ca0-264d1332c7d9","listingId":"2c710270-8038-4d83-b33b-5cf18f088f96","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/45","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:29:08.299Z"}],"sources":[{"listingId":"2c710270-8038-4d83-b33b-5cf18f088f96","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wire/45","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:08.299Z","lastSeenAt":"2026-04-22T17:02:24.763Z"}],"details":{"listingId":"2c710270-8038-4d83-b33b-5cf18f088f96","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wire/45 \\\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 ($0.02) on Base network.","source_url":"https://lowpaymentfee.com/api/v1/wire/45"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access.","source_url":"https://lowpaymentfee.com"},{"claim":"The USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.","source_url":"https://lowpaymentfee.com/api/v1/wire/45"},{"claim":"Docs, pricing, API, and README pages show only 'Connect wallet' with no further content.","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Programmatic access to a pay-per-call API without needing API keys or subscriptions","Agent-driven workflows that settle per-request costs in USDC on Base","Testing x402 payment flows against a live endpoint"],"bestFor":["Developers wanting zero-commitment, pay-as-you-go API access","AI agents with x402 payment capability on Base","Prototyping x402 integrations at low cost ($0.02/call)"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","Anyone without a Base-network USDC wallet or x402-compatible client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:30.126Z"},"updatedAt":"2026-04-22T17:02:24.763Z"}}