{"id":"2840cb2d-1cf0-4e0c-a66f-61ac9397a16d","shortId":"kXYFpQ","kind":"x402","title":"x402-gated premium API access on Base, paid per-call in USDC.","tagline":"x402-gated premium API access on Base, paid per-call in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a variety of pay-per-request APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints on the platform use the x402 protocol to gate access, settling payments in USDC on the Base network.\n\nThe specific endpoint `/api/v1/stripe/subscriptions/91` is labeled \"Premium API Access\" and requires a maximum of 20,000 base units of USDC (i.e., $0.02) per request. The x402 challenge was successfully captured, confirming the endpoint is live and accepting POST requests. Payment is made to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using the USDC contract on Base (`0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`). The endpoint uses the \"exact\" payment scheme with a 300-second timeout.\n\nHowever, the actual functionality behind this specific endpoint is unclear. The name \"Premium API Access\" and the path segment \"stripe/subscriptions/91\" suggest it may relate to subscription management or a bundled access tier, but no documentation, request/response schema, or usage examples are available. The platform's docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no further content. Without concrete documentation on what this endpoint returns or what input it expects, its practical utility is difficult to assess.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","post-method"],"categories":["api-gateway","payments"],"synonyms":["lowpaymentfee","x402 api","pay-per-call api","USDC gated endpoint","Base network API","micropayment API","premium subscription endpoint"],"warnings":["No documentation available — docs, pricing, and API pages all show only 'Connect wallet' with no content.","The actual functionality of this specific endpoint (/api/v1/stripe/subscriptions/91) is unknown; the name 'Premium API Access' is vague.","No request or response schema is provided; input format must be guessed.","The path includes 'stripe/subscriptions' which may imply subscription management, but this is unconfirmed."],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/91","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/stripe/subscriptions/91","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but there is no documentation, no request/response schema, and no examples available. The actual functionality behind 'Premium API Access' is undefined in the crawled material. The docs/pricing/API pages are empty beyond a wallet-connect 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'0.02':115 '000':109 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':138 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':145 '20':108 '300':155 'Base network API' 'USDC gated endpoint' 'accept':130 'access':6,20,36,85,102,172,188 'actual':160 'address':137 'ai':66 'analyt':65 'api':5,19,35,62,101,171,206 'assess':238 'avail':199 'base':8,22,92,110,144 'base-network' 'behind':162 'bundl':187 'call':12,26 'captur':123 'challeng':120 'concret':220 'confirm':124 'connect':212 'content':218 'contract':142 'data':64 'difficult':236 'doc':203 'document':192,221 'endpoint':30,47,75,96,126,147,165,225 'exact':150 'exampl':197 'expect':231 'financ':69 'function':161 'gate':3,17,84 'host':54 'howev':158 'i.e':114 'infrastructur':72 'input':229 'label':99 'learn':68 'live':128 'lowpaymentfee' 'lowpaymentfee.com':32,51 'machin':67 'made':135 'manag':184 'mani':46 'maximum':106 'may':180 'micropayment API' 'name':169 'network':93 'offer':48 'one':44 'page':207 'paid':9,23 'path':175 'pay':59 'pay-per-call api' 'pay-per-request':58 'payment':40,87,133,151 'per':11,25,60,116 'per-cal':10,24 'platform':52,78,201 'post':131 'post-method' 'practic':233 'premium':4,18,34,100,170 'premium subscription endpoint' 'price':204 'prompt':214 'protocol':41,82 'provid':33 'relat':181 'render':209 'request':61,117,132 'request/response':193 'requir':104 'return':226 'schema':194 'scheme':152 'second':156 'segment':176 'settl':86 'span':63 'specif':95,164 'stripe/subscriptions/91':177 'subscript':183 'success':122 'suggest':178 'tier':189 'timeout':157 'unclear':167 'unit':111 'usag':196 'usdc':14,28,89,113,141 'usdc-settlement' 'use':79,139,148 'util':73,234 'varieti':56 'via':37 'wallet':213 'web3':70 'without':219 'x402':2,16,39,81,119 'x402 api' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"aedd91e7-a8da-494a-8aed-7bd2161cd6e4","listingId":"2840cb2d-1cf0-4e0c-a66f-61ac9397a16d","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/stripe/subscriptions/91","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:57:02.651Z"}],"sources":[{"listingId":"2840cb2d-1cf0-4e0c-a66f-61ac9397a16d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/91","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:57:02.651Z","lastSeenAt":"2026-04-22T09:01:35.586Z"}],"details":{"listingId":"2840cb2d-1cf0-4e0c-a66f-61ac9397a16d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/91 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <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 valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/91"},{"claim":"The 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":"The platform offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, pricing, and API pages render only a 'Connect wallet' prompt with no further documentation","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing a premium API tier via x402 micropayment without API keys","Programmatic pay-per-request access settled in USDC on Base","Agent-driven API consumption with on-chain payment"],"bestFor":["Developers wanting keyless, pay-per-call API access","AI agents that can settle x402 payments in USDC on Base","Users who prefer no-commitment, no-subscription API billing"],"notFor":["Users who need detailed API documentation before integrating","Anyone without a Base-compatible USDC wallet","Use cases requiring guaranteed SLAs or support"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:47.987Z"},"updatedAt":"2026-04-22T09:01:35.586Z"}}