{"id":"239730f4-b187-49b8-9444-82c59aeffc17","shortId":"wsY4pK","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 APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all gated via the x402 protocol on the Base network and settled in USDC.\n\nThe specific endpoint `/api/v1/stripe/subscriptions/34` is listed as \"Premium API Access\" and costs up to $0.02 per request (maxAmountRequired of 20,000 base units of USDC with 6 decimals = $0.02). Payment is made via the x402 exact scheme: the caller includes an X-PAYMENT header with a signed USDC payment on Base to the specified payTo address. No API keys, rate limits, or upfront commitments are required — access is instant upon payment.\n\nHowever, the actual functionality behind this specific endpoint is unclear. The endpoint path suggests it relates to Stripe subscriptions, but the platform's landing page does not list or describe this particular route among its documented APIs. The docs, pricing, API, and README pages all returned only a \"Connect wallet\" prompt with no substantive content. Without documentation or example responses, the precise behavior and output of this endpoint cannot be confirmed from the available material.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","per-call-pricing","no-api-key","http-post"],"categories":["api-gateway","payments"],"synonyms":["x402 API","pay-per-call API","USDC API access","Base network API","lowpaymentfee","crypto-paid API","402 payment endpoint"],"warnings":["Endpoint functionality is undocumented — the path '/api/v1/stripe/subscriptions/34' is not listed among the platform's advertised APIs","All documentation pages (docs, pricing, API, README) returned only 'Connect wallet' with no substantive content","No OpenAPI spec, request schema, or response schema available","The relationship between 'Premium API Access' and Stripe subscriptions is unexplained"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/34","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/34","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 captured) and pricing is clear ($0.02/request in USDC on Base). However, there is no documentation, no OpenAPI schema, no example requests or responses, and the actual functionality of this specific endpoint path is undocumented. The docs/pricing/API pages all returned only 'Connect wallet' with no 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'0.02':97,111 '000':103 '20':102 '402 payment endpoint' '6':109 'Base network API' 'USDC API access' 'access':6,20,36,92,150 'actual':157 'address':139 'ai':61 'among':188 'analyt':60 'api':5,19,35,57,91,141,191,195 'avail':228 'base':8,22,77,104,134 'base-network' 'behavior':217 'behind':37,159 'call':12,26 'caller':121 'cannot':223 'commit':147 'confirm':225 'connect':203 'content':209 'cost':94 'crypto-paid API' 'data':59 'decim':110 'describ':184 'doc':193 'document':190,211 'endpoint':30,46,85,162,166,222 'exact':118 'exampl':213 'financ':64 'function':158 'gate':3,17,70 'header':127 'host':53 'howev':155 'http-post' 'includ':122 'infrastructur':67 'instant':152 'key':142 'land':178 'learn':63 'limit':144 'list':88,182 'lowpaymentfee' 'lowpaymentfee.com':32,50 'machin':62 'made':114 'mani':45 'materi':229 'maxamountrequir':100 'network':78 'no-api-key' 'offer':47 'one':43 'output':219 'page':179,198 'paid':9,23 'particular':186 'path':167 'pay-per-call API' 'payment':112,126,132,154 'payto':138 'paywal':40 'per':11,25,98 'per-cal':10,24 'per-call-pricing' 'platform':51,176 'precis':216 'premium':4,18,34,90 'price':194 'prompt':205 'protocol':74 'provid':33 'rate':143 'readm':197 'relat':170 'request':99 'requir':149 'respons':214 'return':200 'rout':187 'scheme':119 'settl':80 'sign':130 'span':58 'specif':84,161 'specifi':137 'stripe':172 'subscript':173 'substant':208 'suggest':168 'unclear':164 'unit':105 'upfront':146 'upon':153 'usdc':14,28,82,107,131 'usdc-settlement' 'util':68 'varieti':55 'via':71,115 'wallet':204 'web3':65 'without':210 'x':125 'x-payment':124 'x402':2,16,39,73,117 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"4814f608-fcb5-45f7-bf86-e6061a5a0ff5","listingId":"239730f4-b187-49b8-9444-82c59aeffc17","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/34","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:54.234Z"}],"sources":[{"listingId":"239730f4-b187-49b8-9444-82c59aeffc17","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/34","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:54.234Z","lastSeenAt":"2026-04-22T10:02:16.942Z"}],"details":{"listingId":"239730f4-b187-49b8-9444-82c59aeffc17","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/34 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <signed-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/34"},{"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":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/34"}],"useCases":["Programmatic access to premium API functionality without traditional API key signup","Agent-driven workflows that need instant, keyless API access settled in USDC on Base","Integrating pay-per-call services into Web3 applications"],"bestFor":["Developers who want keyless, pay-per-request API access","AI agents with USDC on Base that need to purchase API calls autonomously","Projects that prefer crypto micropayments over subscription billing"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","Anyone without USDC on the Base network","Use cases requiring free or trial-tier access"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:48.33Z"},"updatedAt":"2026-04-22T10:02:16.942Z"}}