{"id":"c069dc3c-5cad-46d5-b3f9-89e50be3654a","shortId":"CHk9Vf","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 an x402-enabled API platform that offers a variety of endpoints across data analytics, AI/ML inference, finance/Web3, and utility services. All endpoints are paid per-request using USDC on the Base network, with no API keys, no rate limits, and no commitments required. The specific endpoint at `/api/v1/accounts/36` is listed as \"Premium API Access\" and returns a 402 challenge requesting up to 20,000 base units of USDC (0.02 USD) per call.\n\nThe platform advertises four broad categories of APIs: 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 uniformly at $0.02 per request.\n\nDocumentation is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawled content. The endpoint is confirmed live via a valid x402 402 challenge, but without documentation it is unclear what this specific `/api/v1/accounts/36` endpoint actually returns or what input it expects beyond a POST request.","tags":[],"capabilities":["x402-payment","per-request-billing","usdc-base-network","no-api-key","data-analytics","ai-inference","sentiment-analysis","text-summarization","classification","embeddings","finance-data","geocoding","validation"],"categories":["api-platform","ai","finance","data"],"synonyms":["pay-per-call API","x402 API","USDC micropayment API","low fee API","Base network API","crypto-paid API","serverless API access"],"warnings":["No OpenAPI specification or machine-readable schema available","Documentation pages (docs, API, pricing, README) all render only 'Connect wallet' with no technical content","The specific purpose and expected input/output of /api/v1/accounts/36 ('Premium API Access') is undocumented","No request or response examples are available from any crawled source"],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/36","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/accounts/36","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live via a valid x402 402 challenge, and the landing page provides a high-level overview of available APIs and pricing. However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and no examples. The specific purpose of /api/v1/accounts/36 is unclear. This is effectively a stub 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'machin':123 'metric':117 'network':9,24,66 'no-api-key' 'offer':40 'openapi':183 'page':167 'paid':57 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'per':3,18,59,105,155 'per-request':58 'per-request-billing' 'platform':6,21,38,108 'post':229 'premium':86 'price':133,151,164 'prompt':174 'quot':138 'rate':72,136 'readm':166 'render':169 'report':118 'request':60,94,156,230 'request/response':186 'requir':77 'return':90,221 'schema':187 'sentiment':125 'sentiment-analysis' 'serverless API access' 'servic':53 'spars':160 'spec':184 'specif':79,217 'summar':128 'technic':178 'text':127 'text-summarization' 'token':137 'unclear':214 'uniform':152 'unit':100 'usag':191 'usd':104 'usdc':15,30,62,102 'usdc-base-network' 'use':61 'util':52,143 'valid':145,205 'validation' 'varieti':42 'via':10,25,203 'wallet':173 'web3':132 'without':210 'x402':11,26,35,206 'x402 API' 'x402-enabled':34 'x402-payment'","prices":[{"id":"08b13d3e-17d1-42eb-9d58-439fe8b6f5c1","listingId":"c069dc3c-5cad-46d5-b3f9-89e50be3654a","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/accounts/36","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:39:32.962Z"}],"sources":[{"listingId":"c069dc3c-5cad-46d5-b3f9-89e50be3654a","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/36","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:39:32.962Z","lastSeenAt":"2026-04-22T18:31:05.857Z"}],"details":{"listingId":"c069dc3c-5cad-46d5-b3f9-89e50be3654a","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/36 \\\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 are priced at $0.02 per request with no API keys, no rate limits, and instant access on the Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The x402 challenge for /api/v1/accounts/36 requests maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/36"},{"claim":"The platform offers APIs across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing AI inference endpoints (sentiment, summarization, classification, embeddings) without API key management","Fetching real-time financial data like token quotes, gas estimates, and exchange rates on a per-call basis","Running data analytics queries and exporting reports with micropayment-based billing","Using utility services like geocoding, validation, and conversion without subscription commitments"],"bestFor":["Developers who want pay-as-you-go API access without subscriptions or API keys","Agents and bots that can settle payments in USDC on Base via x402","Projects needing low-cost, low-friction access to a variety of utility and AI endpoints"],"notFor":["Users who need detailed API documentation or OpenAPI specs before integrating","High-volume production workloads that would benefit from bulk pricing or rate-limit guarantees","Developers without access to USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:38.549Z"},"updatedAt":"2026-04-22T18:31:05.857Z"}}