{"id":"a0f132ea-0df7-4a85-b4df-de98d39ea3d5","shortId":"SjvC3E","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\" behind an x402 paywall. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a variety of API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities. All endpoints on the platform use the x402 protocol for per-request payment, settling in USDC on the Base network.\n\nThe specific endpoint `/api/v1/stripe/subscriptions/73` is labeled \"Premium API Access\" in the x402 challenge. The maximum amount required per call is 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals). The endpoint accepts POST requests and returns application/json. However, the actual functionality behind this particular subscription endpoint is not documented — the name suggests it may relate to Stripe subscription management, but no schema, request parameters, or response format are provided.\n\nThe platform advertises a simple pricing model of $0.02 per request with no API keys, no rate limits, and instant access. Payment is made via the x402 `exact` scheme to the specified wallet address on Base. Documentation pages (/docs, /pricing, /api, /README) all returned only a \"Connect wallet\" prompt with no substantive content, so the actual capabilities and request/response contracts of this endpoint remain unclear.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","per-request-billing","json-response","post-method"],"categories":["api-gateway","payments"],"synonyms":["premium API","x402 API","pay-per-call API","USDC API access","lowpaymentfee","Base network API","crypto-paid API"],"warnings":["No documentation available — all doc pages (/docs, /pricing, /api, /README) return only 'Connect wallet'","The actual functionality behind 'Premium API Access' at /api/v1/stripe/subscriptions/73 is unknown","No request or response schema provided","The endpoint path references 'stripe/subscriptions' but no details confirm what it does"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/73","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/73","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC per call on Base). However, there is no documentation of what this endpoint actually does, no request/response schema, and all doc pages return only 'Connect wallet'. The endpoint path suggests Stripe subscription functionality but nothing confirms this. Effectively a stub 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'/api/v1/stripe/subscriptions/73':94 '/docs':202 '/pricing':203 '/readme':205 '0.02':117,172 '000':112 '20':111 '6':122 'Base network API' 'USDC API access' 'accept':126 'access':6,20,36,99,184 'actual':134,219 'address':197 'advertis':166 'ai':62 'amount':106 'analyt':61 'api':5,19,35,57,98,177 'application/json':131 'base':8,22,89,113,199 'base-network' 'behind':37,136 'call':12,26,109 'capabl':220 'categori':58 'challeng':103 'connect':210 'content':216 'contract':223 'crypto-paid API' 'data':60 'decim':123 'document':143,200 'endpoint':30,46,71,93,125,140,226 'exact':191 'financ':65 'format':161 'function':135 'gate':3,17 'host':53 'howev':132 'includ':59 'infrastructur':68 'instant':183 'json-response' 'key':178 'label':96 'learn':64 'limit':181 'lowpaymentfee' 'lowpaymentfee.com':32,50 'machin':63 'made':187 'manag':153 'mani':45 'maximum':105 'may':148 'model':170 'name':145 'network':90 'offer':47 'one':43 'page':201 'paid':9,23 'paramet':158 'particular':138 'pay-per-call API' 'payment':83,185 'paywal':40 'per':11,25,81,108,173 'per-cal':10,24 'per-request':80 'per-request-billing' 'platform':51,74,165 'post':127 'post-method' 'premium':4,18,34,97 'premium API' 'price':169 'prompt':212 'protocol':78 'provid':33,163 'rate':180 'relat':149 'remain':227 'request':82,128,157,174 'request/response':222 'requir':107 'respons':160 'return':130,207 'schema':156 'scheme':192 'settl':84 'simpl':168 'sinc':119 'specif':92 'specifi':195 'stripe':151 'subscript':139,152 'substant':215 'suggest':146 'unclear':228 'unit':114 'usd':118 'usdc':14,28,86,116,120 'usdc-settlement' 'use':75,121 'util':69 'varieti':55 'via':188 'wallet':196,211 'web3':66 'x402':2,16,39,77,102,190 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"66182cb5-73ce-4031-a6d2-af4f40ee062e","listingId":"a0f132ea-0df7-4a85-b4df-de98d39ea3d5","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/73","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:49.406Z"}],"sources":[{"listingId":"a0f132ea-0df7-4a85-b4df-de98d39ea3d5","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/73","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:49.406Z","lastSeenAt":"2026-04-22T12:04:25.515Z"}],"details":{"listingId":"a0f132ea-0df7-4a85-b4df-de98d39ea3d5","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/73 \\\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 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/73"},{"claim":"Platform pricing is $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/73"},{"claim":"Documentation pages return only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Programmatic access to a premium API endpoint with per-request USDC micropayments","Agent-driven workflows that need keyless, pay-as-you-go API access on Base","Testing x402 protocol integrations against a live endpoint"],"bestFor":["Developers experimenting with x402 payment protocol","Agents that can settle USDC on Base for per-call API access","Use cases requiring no API key or subscription signup"],"notFor":["Users who need detailed API documentation or guaranteed SLAs","Applications requiring known, well-documented request/response schemas","Users without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:48.6Z"},"updatedAt":"2026-04-22T12:04:25.515Z"}}