{"id":"7452e824-18ed-495c-9999-a283a4ae9ac7","shortId":"hAJBd5","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 resource `/api/v1/products/24` is one of many endpoints offered by the provider, which spans categories including data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints on the platform are priced at $0.02 per request, payable in USDC on the Base network with no API keys, rate limits, or commitments required.\n\nThe x402 challenge confirms the endpoint is live, accepting POST requests and settling payments in USDC (contract `0x8335...2913` on Base). The maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02. Payment is made via the `exact` scheme with a 300-second timeout. The response MIME type is `application/json`.\n\nHowever, the specific functionality of `/api/v1/products/24` is unclear. The provider's landing page lists many endpoints across different domains but does not specifically describe a `/products/24` resource. The docs, pricing, API, and README pages all returned only a \"Connect wallet\" prompt with no substantive documentation. Without an OpenAPI spec, request/response schemas, or detailed docs, the exact input parameters and output format for this particular endpoint remain unknown.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","json-response","no-api-key","no-rate-limit"],"categories":["api","general"],"synonyms":["premium API","lowpaymentfee","x402 API","USDC pay-per-call","Base network API","micropayment API","products endpoint"],"warnings":["The specific functionality of /api/v1/products/24 is not documented anywhere in the crawled material.","All documentation pages (docs, pricing, API, README) returned only a 'Connect wallet' prompt with no substantive content.","No OpenAPI spec or request/response schema is available — input parameters and output format are unknown.","The endpoint name 'Premium API Access' is generic and does not describe what data or service is returned."],"endpointUrl":"https://lowpaymentfee.com/api/v1/products/24","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/products/24","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 schema, and the specific purpose of /api/v1/products/24 is undocumented. Docs pages returned only 'Connect wallet' with no 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'/products/24':178 '/request':13,28 '0.02':12,27,79,134 '000':125 '0x8335':115 '20':124 '2913':116 '300':144 '6':130 'Base network API' 'USDC pay-per-call' 'accept':106 'access':7,22,38 'across':169 'ai':63 'amount':121 'analyt':62 'api':6,21,37,91,183 'application/json':152 'base':9,24,87,118,126 'call':4,19 'categori':59 'challeng':100 'commit':96 'confirm':101 'connect':191 'contract':114 'data':61 'decim':131 'describ':176 'detail':205 'differ':170 'doc':181,206 'document':197 'domain':171 'endpoint':32,52,72,103,168,217 'equal':133 'exact':140,208 'financ':66 'format':213 'function':156 'howev':153 'includ':60 'infrastructur':69 'input':209 'json-response' 'key':92 'land':164 'learn':65 'limit':94 'list':166 'live':105 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':64 'made':137 'mani':51,167 'maximum':120 'micropayment API' 'mime':149 'network':88 'no-api-key' 'no-rate-limit' 'offer':53 'one':49 'openapi':200 'output':212 'page':165,186 'paramet':210 'particular':216 'pay':2,17 'pay-per-cal':1,16 'pay-per-request' 'payabl':82 'payment':42,111,135 'per':3,18,80 'platform':75 'post':107 'premium':5,20,36 'premium API' 'price':77,182 'products endpoint' 'prompt':193 'protocol':43 'provid':35,56,162 'rate':93 'readm':185 'remain':218 'request':81,108 'request/response':202 'requir':97,122 'resourc':46,179 'respons':148 'return':188 'schema':203 'scheme':141 'second':145 'settl':110 'span':58 'spec':201 'specif':45,155,175 'substant':196 'timeout':146 'type':150 'unclear':160 'unit':127 'unknown':219 'usdc':15,30,84,113,129 'usdc-base-network' 'util':70 'via':10,25,39,138 'wallet':192 'web3':67 'without':198 'x402':11,26,41,99 'x402 API' 'x402-payment'","prices":[{"id":"6d59b3c0-c8c3-491c-acb8-76abb1fe55d7","listingId":"7452e824-18ed-495c-9999-a283a4ae9ac7","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/products/24","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:34:41.842Z"}],"sources":[{"listingId":"7452e824-18ed-495c-9999-a283a4ae9ac7","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/products/24","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:34:41.842Z","lastSeenAt":"2026-04-22T15:00:34.675Z"}],"details":{"listingId":"7452e824-18ed-495c-9999-a283a4ae9ac7","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/products/24 \\\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, rate limits, or commitments","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns maxAmountRequired of 20000 base units USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/products/24"},{"claim":"USDC asset contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/products/24"},{"claim":"Provider offers endpoints across data & analytics, AI & ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium data or services with per-request USDC micropayments","Agent-driven API consumption without pre-registration or API keys","Programmatic access to a pay-as-you-go endpoint on Base L2"],"bestFor":["Developers wanting zero-commitment, pay-per-call API access","AI agents that can settle x402 payments autonomously","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users needing detailed API documentation or guaranteed SLAs before purchasing","Anyone without a Base-compatible USDC wallet","High-volume use cases where per-request pricing may add up"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T17:50:12.175Z"},"updatedAt":"2026-04-22T15:00:34.675Z"}}