{"id":"3274e0c5-2708-4ae9-acc5-cbaae9643078","shortId":"v2b4Qu","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 API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities. All endpoints on the platform are pay-per-request with no API keys, no rate limits, and no commitments required.\n\nThe specific endpoint `/api/v1/stripe/subscriptions/105` is labeled \"Premium API Access\" and returns a valid x402 challenge on POST. The challenge specifies payment in USDC (USD Coin) on the Base network, with a maximum amount of 20,000 base units — which at 6 decimals equals $0.02 per request. Payment is made via the x402 \"exact\" scheme to the specified wallet address. The endpoint accepts POST requests and returns application/json responses.\n\nDocumentation on the platform is extremely sparse. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what \"Premium API Access\" actually returns or what input parameters it expects. The endpoint's purpose beyond its name is unclear — it could relate to Stripe subscription management given the URL path, but this is speculative.","tags":[],"capabilities":["x402-payment","usdc-base-network","per-request-billing","no-api-key","json-response","post-method"],"categories":["api-gateway","payments"],"synonyms":["premium API","x402 API","pay-per-request API","USDC API access","Base network API","lowpaymentfee","stripe subscriptions API"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content.","No OpenAPI or schema describing request parameters or response format.","The actual functionality of 'Premium API Access' at the /stripe/subscriptions/105 path is unknown — the name suggests Stripe subscription management but this is unconfirmed.","No examples of successful (200) responses are available."],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/105","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/105","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but there is no documentation, no OpenAPI schema, no request/response examples, and no explanation of what the endpoint actually does beyond its name. The platform's docs pages are empty. This is effectively a stub 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'0.02':135 '000':127 '20':126 '6':132 'Base network API' 'USDC API access' 'accept':153 'access':6,20,36,100,200 'actual':201 'address':150 'ai':63 'amount':124 'analyt':62 'api':5,19,35,58,83,99,169,199 'application/json':158 'base':8,22,119,128 'beyond':213 'categori':59 'challeng':106,110 'coin':116 'commit':90 'connect':178 'content':184 'could':219 'data':61 'decim':133 'descript':195 'doc':168 'document':160 'endpoint':30,47,72,94,152,210 'equal':134 'exact':144 'exampl':192 'expect':208 'extrem':165 'financ':66 'gate':3,17 'given':225 'host':54 'includ':60 'infrastructur':69 'input':205 'json-response' 'key':84 'label':97 'learn':65 'limit':87 'lowpaymentfee' 'lowpaymentfee.com':32,51 'machin':64 'made':140 'manag':224 'mani':46 'maximum':123 'name':215 'network':120 'no-api-key' 'offer':48 'one':44 'openapi':188 'page':173 'paid':9,23 'paramet':206 'path':228 'pay':78 'pay-per-request':77 'pay-per-request API' 'payment':40,112,138 'per':11,25,79,136 'per-request':10,24 'per-request-billing' 'platform':52,75,163 'post':108,154 'post-method' 'premium':4,18,34,98,198 'premium API' 'price':170 'prompt':180 'protocol':41 'provid':33 'purpos':212 'rate':86 'readm':172 'relat':220 'render':175 'request':12,26,80,137,155 'request/response':191 'requir':91 'respons':159 'return':102,157,202 'schema':189 'scheme':145 'spars':166 'specif':93 'specifi':111,148 'specul':232 'stripe':222 'stripe subscriptions API' 'subscript':223 'unclear':217 'unit':129 'url':227 'usd':115 'usdc':14,28,114 'usdc-base-network' 'util':70 'valid':104 'varieti':56 'via':37,141 'wallet':149,179 'web3':67 'x402':2,16,39,105,143 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"07ca2339-e8b6-4569-aa4a-560f54c27510","listingId":"3274e0c5-2708-4ae9-acc5-cbaae9643078","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/105","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:16.225Z"}],"sources":[{"listingId":"3274e0c5-2708-4ae9-acc5-cbaae9643078","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/105","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:16.225Z","lastSeenAt":"2026-04-22T19:32:03.196Z"}],"details":{"listingId":"3274e0c5-2708-4ae9-acc5-cbaae9643078","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/105\n# Returns 402 with x402 challenge; include X-PAYMENT header with valid payment proof to access.","exampleRequest":null,"exampleResponse":{"error":"X-PAYMENT header is required","accepts":[{"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/105","description":"Premium API Access","maxAmountRequired":"20000","maxTimeoutSeconds":300}],"x402Version":1},"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a valid x402 challenge with USDC on Base, maxAmountRequired 20000 (=$0.02)","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/105"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, API, pricing, and README pages render only 'Connect wallet' with no further content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing a premium API endpoint without traditional API key registration","Making one-off paid API calls settled in USDC on Base","Agent-driven API consumption with per-call micropayments"],"bestFor":["Developers wanting keyless, pay-as-you-go API access","AI agents that can settle x402 payments autonomously","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users who need detailed API documentation before integrating","Anyone requiring non-crypto (fiat-only) payment methods","High-volume use cases where subscription pricing would be cheaper"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:50.193Z"},"updatedAt":"2026-04-22T19:32:03.196Z"}}