{"id":"1c81e387-1921-4606-aaf7-6a7525d81973","shortId":"TXQ8LW","kind":"x402","title":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","tagline":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. The specific path `/api/v1/accounts/158` sits within a broader platform that offers multiple API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities — all priced at $0.02 per request, paid in USDC on the Base network.\n\nThe endpoint accepts POST requests and returns `application/json` responses. Payment is handled inline via the x402 protocol: callers attach an `X-PAYMENT` header with a signed payment of up to 20,000 base units of USDC (i.e., $0.02, since USDC uses 6 decimals) to the payee address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base. No API keys, rate limits, or upfront commitments are required — access is instant upon valid payment.\n\nThe exact functionality of the `/api/v1/accounts/158` path is not documented beyond the label \"Premium API Access.\" The platform's landing page lists sibling endpoints for metrics, reports, data export, insights, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — but no detailed documentation, request/response schemas, or usage examples are available for any of them. The docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no further content.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-api","no-api-key","post-method"],"categories":["api-gateway","misc"],"synonyms":["premium API","low fee API","x402 API","pay-per-call API","USDC API access","Base network API","micropayment API"],"warnings":["No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet' with no content.","The specific purpose and expected input/output of /api/v1/accounts/158 is undocumented; 'Premium API Access' is the only description.","No OpenAPI spec, request schema, or response schema is provided.","Cannot verify what data or service is actually returned after payment."],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/158","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/158","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (returns a valid 402 x402 challenge) and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no request/response schema, no examples, and the specific functionality of /api/v1/accounts/158 is entirely opaque. The docs/pricing/README pages are empty beyond a wallet-connect prompt. This is effectively a stub 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'/request':13,28 '0.02':12,27,72,120 '000':114 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':130 '20':113 '6':124 'Base network API' 'USDC API access' 'accept':84 'access':7,22,38,143,164 'address':129 'ai':61 'analysi':180 'analyt':60 'api':6,21,37,56,134,163,216 'application/json':89 'attach':100 'avail':208 'base':9,24,80,115,132 'beyond':159 'broader':51 'call':4,19 'caller':99 'categori':57 'classif':183 'commit':140 'connect':224 'content':230 'convers':195 'data':59,176 'decim':125 'detail':200 'doc':214 'document':158,201 'embed':184 'endpoint':32,83,172 'estim':192 'exact':150 'exampl':206 'exchang':187 'export':177 'feed':186 'financ':64 'function':151 'gas':191 'generat':197 'geocod':193 'handl':93 'header':105 'i.e':119 'includ':58 'infrastructur':67 'inlin':94 'insight':178 'instant':145 'json-api' 'key':135 'label':161 'land':168 'learn':63 'limit':137 'list':170 'low fee API' 'lowpaymentfee.com':34 'machin':62 'metric':174 'micropayment API' 'multipl':55 'network':81 'no-api-key' 'offer':54 'page':169,219 'paid':75 'path':46,155 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request' 'paye':128 'payment':42,91,104,109,148 'per':3,18,73 'platform':52,166 'post':85 'post-method' 'premium':5,20,36,162 'premium API' 'price':70,185,215 'prompt':226 'protocol':43,98 'provid':35 'quot':190 'rate':136,188 'readm':218 'render':221 'report':175 'request':74,86 'request/response':202 'requir':142 'respons':90 'return':88 'schema':203 'sentiment':179 'sibl':171 'sign':108 'sinc':121 'sit':48 'specif':45 'summar':182 'text':181 'token':189 'unit':116 'upfront':139 'upon':146 'usag':205 'usdc':15,30,77,118,122 'usdc-base' 'use':123 'util':68 'valid':147,194 'via':10,25,39,95 'wallet':225 'web3':65 'within':49 'x':103 'x-payment':102 'x402':11,26,41,97 'x402 API' 'x402-payment'","prices":[{"id":"e7b98955-47ee-482e-b7d1-b37c646b01d8","listingId":"1c81e387-1921-4606-aaf7-6a7525d81973","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/158","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:41:16.307Z"}],"sources":[{"listingId":"1c81e387-1921-4606-aaf7-6a7525d81973","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/158","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:41:16.307Z","lastSeenAt":"2026-04-22T12:03:26.409Z"}],"details":{"listingId":"1c81e387-1921-4606-aaf7-6a7525d81973","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/158 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <signed-x402-payment-header>\"","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 with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/158"},{"claim":"The platform lists APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories, all at $0.02/request","source_url":"https://lowpaymentfee.com"},{"claim":"Pricing is $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, pricing, API, and README pages render only a 'Connect wallet' prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing premium data or services with per-request USDC micropayments on Base","Agent-driven API consumption without pre-registration or API keys","Programmatic pay-as-you-go access to a multi-category API platform"],"bestFor":["Developers or agents wanting zero-commitment, pay-per-call API access","x402-compatible clients on the Base network","Use cases requiring no rate limits and instant access"],"notFor":["Users needing detailed API documentation or guaranteed SLAs before purchasing","Anyone without a Base-compatible USDC wallet","High-volume consumers who need bulk pricing or subscription discounts"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:33.74Z"},"updatedAt":"2026-04-22T12:03:26.409Z"}}