{"id":"47e7eaaf-5054-4040-944a-554c1875e39e","shortId":"8HkXdn","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/76` is listed as \"Premium API Access\" and returns a standard x402 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 lowpaymentfee.com site 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 listed endpoints are priced at $0.02 per request. However, the specific endpoint `/api/v1/wire/76` does not clearly map to any of these named services — its description is simply \"Premium API Access\" with no further documentation on what data or functionality it returns.\n\nDocumentation is extremely sparse. The /docs, /api, /pricing, and /README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what the `/api/v1/wire/76` endpoint actually does beyond its generic title. Callers should be aware that the actual behavior of this endpoint is undocumented.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","no-api-key","json-response"],"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 endpoint /api/v1/wire/76 has no documentation describing what it does or what it returns.","No OpenAPI schema, request format, or response examples are available anywhere on the site.","All documentation pages (/docs, /api, /pricing, /README) render only 'Connect wallet' with no content.","The endpoint name 'Premium API Access' does not map to any of the named services listed on the homepage."],"endpointUrl":"https://lowpaymentfee.com/api/v1/wire/76","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/76","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, confirming it accepts $0.02 USDC on Base. However, there is no documentation, no OpenAPI schema, no request/response examples, and the endpoint's actual functionality ('Premium API Access') is completely undefined. The docs pages are empty beyond a wallet-connect 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'/api/v1/wire/76':56,164,229 '/docs':198 '/pricing':200 '/readme':202 '/request':13,28 '0.02':12,27,80,157 '000':74 '20':73 '402':68 'Base network API' 'USDC micropayment API' 'accept':46 'access':62,94,181 'across':115 'actual':231,243 'advertis':85 'ai':125 'analysi':129 'analyt':119 'api':5,20,38,61,87,180 'attach':97 'awar':240 'base':8,23,51,75 'behavior':244 'beyond':233 'broader':110 'call':4,19,82 'caller':95,237 'categori':117 'challeng':69 'classif':132 'clear':167 'connect':208 'content':214 'convers':149 'crypto-paid API' 'data':118,122,188 'descript':176,225 'document':185,193 'embed':133 'endpoint':55,114,153,163,230,247 'estim':143 'exampl':222 'exchang':138 'export':123 'extrem':195 'feed':137 'financ':134 'four':116 'function':190 'gas':142 'generat':150 'generic':235 'geocod':147 'header':102 'howev':160 'i.e':79 'infrastructur':145 'insight':124 'instant':93 'json-response' 'key':88 'learn':127 'limit':91 'list':58,152 'lowpaymentfee' 'lowpaymentfee.com':31,111 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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/76","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:29:16.150Z"}],"sources":[{"listingId":"47e7eaaf-5054-4040-944a-554c1875e39e","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wire/76","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:16.150Z","lastSeenAt":"2026-04-22T16:32:23.679Z"}],"details":{"listingId":"47e7eaaf-5054-4040-944a-554c1875e39e","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wire/76 \\\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 requesting up to 20,000 base units of USDC ($0.02) on Base network.","source_url":"https://lowpaymentfee.com/api/v1/wire/76"},{"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 site lists endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories.","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.","source_url":"https://lowpaymentfee.com/api/v1/wire/76"}],"useCases":["Accessing a pay-per-call API without needing API keys or subscriptions","Making micropayment-gated API requests settled in USDC on Base","Integrating x402-compatible endpoints into agent workflows"],"bestFor":["Developers wanting zero-commitment, pay-as-you-go API access","AI agents that can settle x402 payments autonomously","Users who prefer crypto-native payment rails over traditional billing"],"notFor":["Anyone needing documented request/response schemas before integrating","Use cases requiring guaranteed SLAs or support contracts","Users without access to USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:29.784Z"},"updatedAt":"2026-04-22T16:32:23.679Z"}}