{"id":"9121e60c-240f-4972-bc43-2137f5e6d5cd","shortId":"7YU8A6","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/70` is one of many endpoints offered by the platform, which spans data & analytics, AI & machine learning, finance & Web3, and infrastructure utility categories. All endpoints on the platform are priced at $0.02 per request, settled in USDC on the Base network.\n\nThe x402 challenge confirms the endpoint is live and accepts POST requests. Payment is made via the `exact` scheme to the specified wallet address, with the asset being USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` on Base). The maxAmountRequired of 20000 base units equals $0.02 (USDC uses 6 decimals). The platform advertises no API keys, no rate limits, and instant access — you simply attach an x402 payment header to each request.\n\nHowever, the specific functionality of `/api/v1/products/70` is unclear. The landing page lists many endpoints across categories but does not include a `/products/` route in its public catalog. There is no OpenAPI spec, no detailed documentation (the docs, pricing, and README pages all render only a \"Connect wallet\" prompt), and no request/response examples. The endpoint's description is simply \"Premium API Access\" with no further detail on what data or service it returns.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","no-api-key","http-post"],"categories":["api-marketplace","payments"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","lowpaymentfee","Base network API","crypto-paid API"],"warnings":["The specific purpose of /api/v1/products/70 is not documented anywhere in the crawled material","No OpenAPI spec or request/response schema available","All documentation pages (docs, pricing, README, api) render only 'Connect wallet' with no useful content","The /products/ path does not appear in the platform's public endpoint catalog"],"endpointUrl":"https://lowpaymentfee.com/api/v1/products/70","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/70","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but the specific functionality of /api/v1/products/70 is undocumented. No OpenAPI spec, no request/response schema, and no meaningful documentation pages are available — all secondary pages just show 'Connect wallet'. This is effectively a stub 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'/products':176 '/request':13,28 '0.02':12,27,78,128 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':118 '20000':124 '6':131 'Base network API' 'USDC micropayment API' 'accept':97 'access':7,22,38,144,215 'across':169 'address':111 'advertis':135 'ai':61 'analyt':60 'api':6,21,37,137,214 'asset':114 'attach':147 'base':9,24,86,120,125 'call':4,19 'catalog':181 'categori':69,170 'challeng':90 'confirm':91 'connect':200 'contract':117 'crypto-paid API' 'data':59,222 'decim':132 'descript':210 'detail':188,219 'doc':191 'document':189 'endpoint':32,52,71,93,168,208 'equal':127 'exact':105 'exampl':206 'financ':64 'function':158 'header':151 'howev':155 'http-post' 'includ':174 'infrastructur':67 'instant':143 'key':138 'land':164 'learn':63 'limit':141 'list':166 'live':95 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':62 'made':102 'mani':51,167 'maxamountrequir':122 'network':87 'no-api-key' 'offer':53 'one':49 'openapi':185 'page':165,195 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request' 'payment':42,100,150 'per':3,18,79 'platform':56,74,134 'post':98 'premium':5,20,36,213 'price':76,192 'prompt':202 'protocol':43 'provid':35 'public':180 'rate':140 'readm':194 'render':197 'request':80,99,154 'request/response':205 'resourc':46 'return':226 'rout':177 'scheme':106 'servic':224 'settl':81 'simpli':146,212 'span':58 'spec':186 'specif':45,157 'specifi':109 'unclear':162 'unit':126 'usdc':15,30,83,116,129 'usdc-base-network' 'use':130 'util':68 'via':10,25,39,103 'wallet':110,201 'web3':65 'x402':11,26,41,89,149 'x402 API' 'x402-payment'","prices":[{"id":"54d8d170-1350-46d7-a0a1-512984c53406","listingId":"9121e60c-240f-4972-bc43-2137f5e6d5cd","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/70","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:35:28.289Z"}],"sources":[{"listingId":"9121e60c-240f-4972-bc43-2137f5e6d5cd","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/products/70","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:35:28.289Z","lastSeenAt":"2026-04-23T18:09:16.566Z"}],"details":{"listingId":"9121e60c-240f-4972-bc43-2137f5e6d5cd","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/products/70 \\\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, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns maxAmountRequired of 20000 base units in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/products/70"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/products/70"}],"useCases":["Accessing premium data or services with per-request USDC micropayments","Agent-driven API consumption without pre-registration or API keys","Programmatic pay-as-you-go access to various utility endpoints"],"bestFor":["Developers wanting keyless, pay-per-call API access","AI agents that can settle x402 payments on Base","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","Anyone without a Base-compatible USDC wallet or x402 client","Use cases requiring free or high-volume bulk access"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:50.611Z"},"updatedAt":"2026-04-23T18:09:16.566Z"}}