{"id":"75a6f3dc-f223-4e52-bd98-d9c2b5ca7291","shortId":"rnPuXU","kind":"x402","title":"Pay-per-request API platform on Base network via x402 — $0.02/call in USDC.","tagline":"Pay-per-request API platform on Base network via x402 — $0.02/call in USDC.","description":"lowpaymentfee.com is an x402-enabled API platform that offers a broad set of endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and utility services. All endpoints are pay-per-request at $0.02 each, settled in USDC on the Base network. No API keys, accounts, or rate limits are required — callers simply attach an x402 payment header to each request.\n\nThe specific endpoint at `/api/v1/orders/30` is listed as \"Premium API Access\" and returns a 402 challenge requesting up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. The payment scheme is \"exact\" with a 300-second timeout. The endpoint accepts POST requests and returns application/json.\n\nThe broader platform advertises 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 (geocoding, validation, conversion, generation). However, documentation pages beyond the landing page are essentially empty (showing only \"Connect wallet\"), so the actual behavior, request schemas, and response formats of individual endpoints are undocumented. The specific purpose of the `/api/v1/orders/30` endpoint is unclear from available materials.","tags":[],"capabilities":["x402-payment","pay-per-request","usdc-settlement","base-network","data-analytics","ai-inference","sentiment-analysis","text-summarization","classification","embeddings","finance-data","geocoding","no-api-key"],"categories":["ai","data","finance","infrastructure"],"synonyms":["low payment fee","x402 api","pay per call api","micropayment api","USDC api","base network api","serverless api"],"warnings":["Documentation pages (/docs, /api, /pricing, /README) are effectively empty — only showing 'Connect wallet'","No OpenAPI or schema available for any endpoint","The specific function of /api/v1/orders/30 ('Premium API Access') is not explained anywhere","Request body format and response structure are completely undocumented","The breadth of advertised capabilities (AI, finance, geocoding, etc.) cannot be verified from available materials"],"endpointUrl":"https://lowpaymentfee.com/api/v1/orders/30","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/orders/30","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge, confirming pricing and payment details. However, documentation pages are empty, there is no OpenAPI spec, no request/response schema, and the specific purpose of /api/v1/orders/30 is unclear. The platform lists many endpoint categories but provides no detail on any of 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'learn':162 'limit':79 'list':98 'low payment fee' 'lowpaymentfee.com':31 'machin':161 'materi':224 'metric':155 'micropayment api' 'network':9,24,72 'no-api-key' 'offer':40 'page':187,191 'pay':2,17,60 'pay per call api' 'pay-per-request':1,16,59 'payment':87,130 'per':3,18,61 'platform':6,21,38,149 'post':142 'premium':100 'price':171 'purpos':215 'quot':176 'rate':78,174 'report':156 'request':4,19,62,91,108,143,203 'requir':81 'respons':206 'return':104,145 'schema':204 'scheme':131 'second':137 'sentiment':163 'sentiment-analysis' 'serverless api' 'servic':55 'set':43 'settl':66 'show':195 'simpli':83 'span':46 'specif':93,214 'summar':166 'text':165 'text-summarization' 'timeout':138 'token':175 'unclear':221 'undocu':212 'unit':114 'usdc':15,30,68,116,125 'usdc-settlement' 'util':54 'valid':182 'via':10,25 'wallet':198 'web3':170 'x402':11,26,35,86 'x402 api' 'x402-enabled':34 'x402-payment'","prices":[{"id":"1efa26c1-9e8b-41fd-90e9-578adbe47eed","listingId":"75a6f3dc-f223-4e52-bd98-d9c2b5ca7291","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/orders/30","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:35:37.966Z"}],"sources":[{"listingId":"75a6f3dc-f223-4e52-bd98-d9c2b5ca7291","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/orders/30","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:35:37.966Z","lastSeenAt":"2026-04-22T23:00:55.424Z"}],"details":{"listingId":"75a6f3dc-f223-4e52-bd98-d9c2b5ca7291","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/orders/30 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"All endpoints 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":"x402 challenge returns maxAmountRequired of 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, equaling $0.02","source_url":"https://lowpaymentfee.com/api/v1/orders/30"},{"claim":"Platform advertises Data & Analytics, AI & ML, Finance & Web3, and Infrastructure endpoint categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Agents needing on-demand AI inference (sentiment, summarization, classification) without API key setup","Fetching real-time financial data or crypto gas estimates with per-call USDC micropayments","Running geocoding or data validation utilities without subscription commitments","Exporting analytics data or generating insights on a pay-as-you-go basis"],"bestFor":["AI agents that can settle x402 payments in USDC on Base","Developers wanting zero-setup, no-account API access","Low-volume or bursty workloads where per-request pricing is more economical than subscriptions"],"notFor":["High-volume production workloads needing SLAs or guaranteed uptime","Users who need detailed API documentation, request/response schemas, or error handling guides","Callers who cannot settle payments on the Base L2 network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:50.144Z"},"updatedAt":"2026-04-22T23:00:55.424Z"}}