{"id":"0107ad18-d801-4876-93fc-5387f8b35fa0","shortId":"fVwPZz","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 broad catalog of endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities. Every endpoint costs $0.02 per request, paid in USDC on the Base network with no API keys, no rate limits, and no commitments required. The specific endpoint at `/api/v1/accounts/34` is listed as \"Premium API Access\" and returns `application/json` via POST.\n\nThe x402 challenge confirms the endpoint is live, accepting payment of up to 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals = $0.02) per call. Payment is sent to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using the \"exact\" scheme with a 300-second timeout. The platform advertises additional endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02 price point.\n\nDocumentation is extremely sparse: the /docs, /api, /pricing, and /README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no examples available. The exact functionality behind the `/api/v1/accounts/34` path is unclear — the name \"Premium API Access\" is generic and does not describe what data or service is returned.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","json-response","no-api-key","accounts-api"],"categories":["api-platform","crypto"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","low payment fee API","crypto-paid API"],"warnings":["No API documentation available — /docs, /api, /pricing, and /README pages all show only 'Connect wallet'","No OpenAPI or schema definition found for any endpoint","The specific function of /api/v1/accounts/34 ('Premium API Access') is undocumented and unclear","No request body schema or response schema is provided anywhere"],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/34","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/34","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI spec, no request/response examples, and the purpose of the /api/v1/accounts/34 endpoint is entirely opaque. The docs pages are empty beyond a wallet-connect 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'/api/v1/accounts/34':84,211 '/docs':176 '/pricing':178 '/readme':180 '/request':13,28 '0.02':12,27,59,121,168 '000':110 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':129 '0x8335':115 '20':109 '2913':116 '300':136 '6':119 'Base network API' 'USDC micropayment API' 'accept':104 'access':90,219 'accounts-api' 'addit':142 'address':128 'advertis':141 'ai/ml':49 'analysi':146 'analyt':48 'api':5,20,37,71,89,218 'application/json':93 'avail':205 'base':8,23,67,111,118 'behind':209 'broad':42 'call':4,19,123 'catalog':43 'challeng':98 'classif':149 'commit':78 'confirm':99 'connect':186 'content':192 'convers':161 'cost':58 'crypto-paid API' 'data':47,52,227 'decim':120 'describ':225 'document':171,201 'embed':150 'enabl':36 'endpoint':45,57,82,101,143 'estim':158 'everi':56 'exact':132,207 'exampl':204 'exchang':153 'extrem':173 'feed':152 'finance/web3':51 'function':208 'gas':157 'generat':163 'generic':221 'geocod':159 'infer':50 'infrastructur':54 'json-response' 'key':72 'limit':75 'list':86 'live':103 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':31 'name':216 'network':9,24,68 'no-api-key' 'offer':40 'openapi':196 'page':181 'paid':62 'path':212 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request' 'payment':105,124 'per':3,18,60,122 'platform':6,21,38,140 'point':170 'post':95 'premium':88,217 'price':151,169 'prompt':188 'quot':156 'rate':74,154 'render':183 'request':61 'request/response':199 'requir':79 'return':92,231 'schema':200 'scheme':133 'second':137 'sent':126 'sentiment':145 'servic':229 'span':46 'spars':174 'spec':197 'specif':81 'summar':148 'text':147 'timeout':138 'token':155 'unclear':214 'unit':112 'usdc':15,30,64,114 'usdc-base-network' 'use':130 'util':55 'valid':160 'via':10,25,94 'wallet':187 'x402':11,26,35,97 'x402 API' 'x402-enabled':34 'x402-payment'","prices":[{"id":"056fc5e0-7fe6-4596-a03e-bed5bc428f97","listingId":"0107ad18-d801-4876-93fc-5387f8b35fa0","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/34","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:39:31.762Z"}],"sources":[{"listingId":"0107ad18-d801-4876-93fc-5387f8b35fa0","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/34","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:39:31.762Z","lastSeenAt":"2026-04-24T02:02:02.829Z"}],"details":{"listingId":"0107ad18-d801-4876-93fc-5387f8b35fa0","quickStartSnippet":"# Send a POST with x402 payment header to access the endpoint\ncurl -X POST https://lowpaymentfee.com/api/v1/accounts/34 \\\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":"Endpoint returns 402 with x402 challenge accepting USDC on Base network, maxAmountRequired 20000 base units ($0.02)","source_url":"https://lowpaymentfee.com/api/v1/accounts/34"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/accounts/34"},{"claim":"Available API categories include Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing account data via a single pay-per-call request without needing API keys","Programmatic integration where agents pay per request using USDC on Base","Testing x402 payment protocol integrations against a live endpoint"],"bestFor":["Developers wanting zero-signup, pay-as-you-go API access","AI agents with x402 payment capability on Base network","Prototyping x402 payment flows at low cost ($0.02/call)"],"notFor":["Users who need detailed API documentation or response schemas before integrating","High-volume use cases where per-request pricing may add up without bulk discounts"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:38.637Z"},"updatedAt":"2026-04-24T02:02:02.829Z"}}