{"id":"97e8b841-3f56-455c-a0f1-355a82cd9f94","shortId":"LNucJ7","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 several endpoints offered by the provider, which spans categories including data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. The specific endpoint `/api/v1/stripe/subscriptions/3` is labeled \"Premium API Access\" and costs $0.02 per request (20,000 base units of USDC on Base, where USDC uses 6 decimals). Payment is settled on the Base L2 network using USDC (contract 0x8335…2913) with the x402 \"exact\" scheme.\n\nThe provider advertises a simple pay-per-use model: no API keys, no rate limits, no minimums, and instant access. All endpoints appear to follow the same $0.02/request pricing. However, the crawled documentation pages (docs, api, pricing, README) all returned only a \"Connect wallet\" prompt with no substantive content, so the actual functionality behind this particular endpoint is unclear. The name \"Premium API Access\" and the path segment \"stripe/subscriptions\" suggest it may relate to Stripe subscription management, but no schema, request/response examples, or detailed documentation were found to confirm this.\n\nBecause the endpoint is live (returns a valid 402 challenge) but lacks any documentation about what it actually does, what inputs it accepts, or what outputs it returns, agents should treat this as a stub listing until more information becomes available.","tags":[],"capabilities":["x402-payment","usdc-base","per-request-billing","no-api-key","http-post"],"categories":["api-gateway","payments"],"synonyms":["lowpaymentfee","premium api","stripe subscriptions","x402 api","pay-per-call api","USDC api access","base network api"],"warnings":["No documentation available — all doc/pricing/README pages return only 'Connect wallet' with no content","Actual functionality of this endpoint is unknown; the name and path suggest Stripe subscription management but this is unconfirmed","No input or output schema provided","No request or response examples available"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/3","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/3","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 402 challenge, confirming pricing and payment details. However, there is no documentation, no OpenAPI schema, no request/response examples, and the actual functionality behind 'Premium API Access' is entirely undocumented. All doc pages returned only 'Connect wallet' with no 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'/request':140 '0.02':77,139 '000':81 '0x8335':104 '20':80 '2913':105 '402':211 '6':91 'USDC api access' 'accept':225 'access':6,20,36,74,131,176 'actual':164,220 'advertis':113 'agent':231 'ai':58 'analyt':57 'api':5,19,35,73,122,148,175 'appear':134 'avail':243 'base':8,22,82,87,98 'base network api' 'becom':242 'behind':166 'categori':54 'challeng':212 'confirm':201 'connect':155 'content':161 'contract':103 'cost':76 'crawl':144 'data':56 'decim':92 'detail':196 'doc':147 'document':145,197,216 'endpoint':30,47,68,133,169,205 'exact':109 'exampl':194 'financ':61 'follow':136 'found':199 'function':165 'gate':3,17 'howev':142 'http-post' 'includ':55 'inform':241 'infrastructur':64 'input':223 'instant':130 'key':123 'l2':99 'label':71 'lack':214 'learn':60 'limit':126 'list':238 'live':207 'lowpaymentfee' 'lowpaymentfee.com':32 'machin':59 'manag':189 'may':184 'minimum':128 'model':120 'name':173 'network':100 'no-api-key' 'offer':48 'one':44 'output':228 'page':146 'paid':9,23 'particular':168 'path':179 'pay':117 'pay-per-call api' 'pay-per-us':116 'payment':40,93 'per':11,25,78,118 'per-request':10,24 'per-request-billing' 'premium':4,18,34,72,174 'premium api' 'price':141,149 'prompt':157 'protocol':41 'provid':33,51,112 'rate':125 'readm':150 'relat':185 'request':12,26,79 'request/response':193 'return':152,208,230 'schema':192 'scheme':110 'segment':180 'settl':95 'sever':46 'simpl':115 'span':53 'specif':67 'stripe':187 'stripe subscriptions' 'stripe/subscriptions':181 'stub':237 'subscript':188 'substant':160 'suggest':182 'treat':233 'unclear':171 'unit':83 'usdc':14,28,85,89,102 'usdc-base' 'use':90,101,119 'util':65 'valid':210 'via':37 'wallet':156 'web3':62 'x402':2,16,39,108 'x402 api' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"3de09414-636d-43ae-a2c5-09ca284aca86","listingId":"97e8b841-3f56-455c-a0f1-355a82cd9f94","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/3","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:36.727Z"}],"sources":[{"listingId":"97e8b841-3f56-455c-a0f1-355a82cd9f94","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/3","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:36.727Z","lastSeenAt":"2026-04-22T15:02:03.591Z"}],"details":{"listingId":"97e8b841-3f56-455c-a0f1-355a82cd9f94","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/3 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns a valid x402 402 challenge with maxAmountRequired of 20000 USDC base units on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/3"},{"claim":"Provider advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/3"}],"useCases":["Programmatic access to a premium API endpoint with per-call USDC payment on Base","Agent-driven API consumption without pre-registration or API keys","Exploring x402 payment protocol integration patterns"],"bestFor":["Developers experimenting with x402 pay-per-call protocols","Agents that can settle USDC payments on Base L2","Users who want keyless, instant API access"],"notFor":["Users who need detailed documentation or guaranteed SLAs before calling","Anyone without a Base-compatible USDC wallet","Use cases requiring free or fiat-only payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:49.264Z"},"updatedAt":"2026-04-22T15:02:03.591Z"}}