{"id":"7c7b532a-fb9f-4d0f-9f33-e65c8c30124c","shortId":"sZKR4r","kind":"x402","title":"x402-gated premium API access on Base, paid per-request in USDC.","tagline":"x402-gated premium API access on Base, paid per-request 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 APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all gated behind x402 micropayments settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/stripe/subscriptions/50` is listed as \"Premium API Access\" and costs up to 0.02 USDC per request (maxAmountRequired of 20,000 base units with USDC's 6 decimals). Payment is made via the x402 exact scheme: callers attach an X-PAYMENT header with a signed USDC payment to the specified payTo address on Base. No API keys, rate limits, or upfront commitments are required — access is instant upon valid payment.\n\nThe endpoint accepts HTTP POST requests and returns `application/json`. However, the crawled documentation pages (docs, pricing, API, README) all returned only a \"Connect wallet\" prompt with no further detail, so the actual request/response schema for this particular endpoint is unknown. The endpoint name suggests it may relate to Stripe subscription management, but no concrete documentation confirms what data or functionality it provides. The platform advertises a uniform $0.02/request pricing model across all its endpoints.","tags":[],"capabilities":["x402-payment","usdc-micropayment","base-network","http-post","json-response","no-api-key","pay-per-request"],"categories":["api-gateway","payments"],"synonyms":["lowpaymentfee","x402 api","micropayment api","USDC pay-per-call","base network api","stripe subscriptions api","premium api access"],"warnings":["No documentation available — all doc pages return only 'Connect wallet' with no content","The actual functionality of this endpoint is unknown; 'Premium API Access' and the path '/api/v1/stripe/subscriptions/50' are the only hints","No request or response schema is provided","The endpoint name references 'stripe/subscriptions' but it is unclear whether this actually interacts with Stripe or is just a naming convention"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/50","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/50","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 x402 402 challenge), and pricing is clear at $0.02 USDC per request. However, there is no documentation, no request/response schema, and no explanation of what 'Premium API Access' actually does. The docs, pricing, API, and README pages all return only 'Connect wallet' with no content. This is effectively a stub 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'/request':222 '0.02':96,221 '000':103 '20':102 '6':109 'USDC pay-per-call' 'accept':156 'access':6,20,36,91,148 'across':225 'actual':185 'address':135 'advertis':218 'ai':62 'analyt':61 'api':5,19,35,58,90,139,170 'application/json':162 'attach':120 'base':8,22,80,104,137 'base network api' 'base-network' 'behind':72 'caller':119 'commit':145 'concret':207 'confirm':209 'connect':176 'cost':93 'crawl':165 'data':60,211 'decim':110 'detail':182 'doc':168 'document':166,208 'endpoint':30,47,84,155,191,195,228 'exact':117 'financ':65 'function':213 'gate':3,17,71 'header':125 'host':54 'howev':163 'http':157 'http-post' 'infrastructur':68 'instant':150 'json-response' 'key':140 'learn':64 'limit':142 'list':87 'lowpaymentfee' 'lowpaymentfee.com':32,51 'machin':63 'made':113 'manag':204 'mani':46 'maxamountrequir':100 'may':199 'micropay':74 'micropayment api' 'model':224 'name':196 'network':81 'no-api-key' 'offer':48 'one':44 'page':167 'paid':9,23 'particular':190 'pay-per-request' 'payment':40,111,124,130,153 'payto':134 'per':11,25,98 'per-request':10,24 'platform':52,217 'post':158 'premium':4,18,34,89 'premium api access' 'price':169,223 'prompt':178 'protocol':41 'provid':33,215 'rate':141 'readm':171 'relat':200 'request':12,26,99,159 'request/response':186 'requir':147 'return':161,173 'schema':187 'scheme':118 'settl':75 'sign':128 'span':59 'specif':83 'specifi':133 'stripe':202 'stripe subscriptions api' 'subscript':203 'suggest':197 'uniform':220 'unit':105 'unknown':193 'upfront':144 'upon':151 'usdc':14,28,77,97,107,129 'usdc-micropayment' 'util':69 'valid':152 'varieti':56 'via':37,114 'wallet':177 'web3':66 'x':123 'x-payment':122 'x402':2,16,39,73,116 'x402 api' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"226da44b-dd40-4f45-bfeb-aaeb5a71c8a6","listingId":"7c7b532a-fb9f-4d0f-9f33-e65c8c30124c","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/50","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:56.012Z"}],"sources":[{"listingId":"7c7b532a-fb9f-4d0f-9f33-e65c8c30124c","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/50","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:56.012Z","lastSeenAt":"2026-04-22T10:32:10.042Z"}],"details":{"listingId":"7c7b532a-fb9f-4d0f-9f33-e65c8c30124c","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/50 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-signed-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 in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/50"},{"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":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/50"},{"claim":"Documentation pages (docs, pricing, API, README) all returned only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Programmatic access to premium API functionality without traditional API key management","Agent-driven workflows that need to pay per-call using on-chain USDC","Accessing subscription-related data or operations via a single micropayment"],"bestFor":["Developers or agents wanting key-less, pay-per-request API access","x402-compatible agents settling payments in USDC on Base","Use cases requiring low-friction, no-commitment API consumption"],"notFor":["Users who need detailed API documentation before integrating — docs are currently empty","High-volume use cases where per-request pricing may not be cost-effective compared to subscription plans"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:48.304Z"},"updatedAt":"2026-04-22T10:32:10.042Z"}}