{"id":"16822ecf-8b5a-4125-9e32-e50452b88a59","shortId":"VU2yJD","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, settling payments in USDC on the Base network. The specific resource path (`/api/v1/stripe/subscriptions/125`) suggests a subscription-related or premium-tier endpoint, though the exact data or functionality it returns is not documented beyond its title.\n\nThe provider operates a broader platform offering multiple x402-gated API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities — all priced at $0.02 per request. However, this particular endpoint advertises a maxAmountRequired of 20,000 base units of USDC (6 decimals), which equals $0.02, consistent with the site-wide pricing. Payment is made via the x402 exact scheme to a specified wallet address, with a 300-second timeout.\n\nDocumentation is extremely sparse. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI spec, no request/response schema beyond the x402 challenge's outputSchema stub, and no description of what data or service this endpoint actually returns. The endpoint is confirmed live (returns 402 with a valid x402 challenge), but without documentation it is unclear what payload to send or what response to expect.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","per-call-pricing","premium-api"],"categories":["api","payments"],"synonyms":["x402 API","pay-per-call API","USDC API access","Base network API","lowpaymentfee","crypto-paid API","402 payment endpoint"],"warnings":["No documentation available — all doc/pricing/API pages render only 'Connect wallet'","No OpenAPI or request/response schema provided","The endpoint path references 'stripe/subscriptions' but the actual functionality is undocumented","No examples of expected request body or response format"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/125","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/125","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 challenge, but documentation is essentially nonexistent — all doc pages show only 'Connect wallet'. There is no OpenAPI spec, no request/response examples, and no description of what the endpoint actually does beyond its title 'Premium API Access'. The purpose of the specific path (/stripe/subscriptions/125) is 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'0.02':105,126 '000':117 '20':116 '300':149 '402':207 '402 payment endpoint' '6':122 'Base network API' 'USDC API access' 'access':6,20,36 'actual':199 'address':146 'advertis':112 'ai':94 'analyt':93 'api':5,19,35,89,158 'base':8,22,47,118 'base-network' 'behind':37 'beyond':75,182 'broader':82 'call':12,26 'categori':90 'challeng':185,212 'confirm':204 'connect':167 'consist':127 'content':173 'crypto-paid API' 'data':67,92,194 'decim':123 'descript':191 'doc':157 'document':74,152,215 'endpoint':30,63,111,198,202 'equal':125 'exact':66,140 'expect':227 'extrem':154 'financ':97 'function':69 'gate':3,17,88 'howev':108 'includ':91 'infrastructur':100 'learn':96 'live':205 'lowpaymentfee' 'lowpaymentfee.com':32 'machin':95 'made':136 'maxamountrequir':114 'multipl':85 'network':48 'offer':84 'openapi':177 'oper':80 'outputschema':187 'page':162 'paid':9,23 'particular':110 'path':52 'pay-per-call API' 'payload':220 'payment':42,134 'paywal':40 'per':11,25,106 'per-cal':10,24 'per-call-pricing' 'platform':83 'premium':4,18,34,61 'premium-api' 'premium-ti':60 'price':103,133,159 'prompt':169 'provid':33,79 'readm':161 'relat':58 'render':164 'request':107 'request/response':180 'resourc':51 'respons':225 'return':71,200,206 'schema':181 'scheme':141 'second':150 'send':222 'servic':196 'settl':41 'site':131 'site-wid':130 'spars':155 'spec':178 'specif':50 'specifi':144 'stub':188 'subscript':57 'subscription-rel':56 'substant':172 'suggest':54 'though':64 'tier':62 'timeout':151 'titl':77 'unclear':218 'unit':119 'usdc':14,28,44,121 'usdc-settlement' 'util':101 'valid':210 'via':137 'wallet':145,168 'web3':98 'wide':132 'without':214 'x402':2,16,39,87,139,184,211 'x402 API' 'x402-gated':1,15,86 'x402-payment'","prices":[{"id":"b46f7c08-5fa4-48c5-9a1b-f7bb3eb7188e","listingId":"16822ecf-8b5a-4125-9e32-e50452b88a59","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/125","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:22.309Z"}],"sources":[{"listingId":"16822ecf-8b5a-4125-9e32-e50452b88a59","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/125","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:22.309Z","lastSeenAt":"2026-04-22T07:01:26.837Z"}],"details":{"listingId":"16822ecf-8b5a-4125-9e32-e50452b88a59","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/125 \\\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/125"},{"claim":"The site advertises $0.02 per request pricing across all APIs 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/125"}],"useCases":["Accessing a premium API resource with per-call USDC micropayments","Agent-driven API consumption without API keys or subscriptions","Programmatic access to subscription-related data via x402 protocol"],"bestFor":["Developers experimenting with x402 payment protocol","Agents that can handle x402 USDC payments on Base","Use cases requiring keyless, pay-per-call API access"],"notFor":["Users who need detailed API documentation before integrating","Production workloads requiring guaranteed SLAs or support","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:49.911Z"},"updatedAt":"2026-04-22T07:01:26.837Z"}}