{"id":"aa73bd3c-bb03-4d83-878c-8d64d635766f","shortId":"uLt2wy","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\" 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 settlement on the Base network using USDC.\n\nThe specific endpoint `/api/v1/stripe/subscriptions/74` is labeled \"Premium API Access\" and costs $0.02 per request (20,000 base units of USDC with 6 decimals). Payment is made via the x402 exact scheme: callers include an X-PAYMENT header with a signed payment to the specified wallet address on Base. The endpoint accepts POST requests and returns application/json responses.\n\nDocumentation on the platform is extremely sparse — the docs, pricing, API, 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 it expects. The endpoint is live (returns a valid 402 challenge), but without documentation it is unclear what functionality this specific subscription endpoint provides beyond its name.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","per-request-billing","no-api-key","json-response"],"categories":["api-gateway","payments"],"synonyms":["x402 API","pay-per-call API","USDC API access","lowpaymentfee","Base network API","crypto-paid API","402 payment API"],"warnings":["No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet' with no content.","No OpenAPI or schema describing request parameters or response format.","The purpose of 'Premium API Access' at /api/v1/stripe/subscriptions/74 is completely undocumented — unclear what it returns.","The endpoint path references 'stripe/subscriptions' which may relate to Stripe subscription management, but this is speculative."],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/74","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/74","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 it exists and accepts payments. However, there is no documentation, no OpenAPI schema, no request/response examples, and the endpoint name 'Premium API Access' is entirely generic. It is impossible to determine what this endpoint actually does from the available 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'0.02':107 '000':111 '20':110 '402':209 '402 payment API' '6':117 'Base network API' 'USDC API access' 'accept':147 'access':6,20,36,104,194 'actual':195 'address':142 'ai':63 'analyt':62 'api':5,19,35,58,83,103,164,193 'application/json':152 'base':8,22,92,112,144 'base-network' 'beyond':224 'call':12,26 'caller':127 'categori':59 'challeng':210 'connect':172 'content':178 'cost':106 'crypto-paid API' 'data':61 'decim':118 'descript':189 'doc':162 'document':154,213 'endpoint':30,47,72,98,146,203,222 'exact':125 'exampl':186 'expect':201 'extrem':159 'financ':66 'function':218 'gate':3,17 'header':133 'host':54 'includ':60,128 'infrastructur':69 'input':199 'json-response' 'key':84 'label':101 'learn':65 'limit':87 'live':205 'lowpaymentfee' 'lowpaymentfee.com':32,51 'machin':64 'made':121 'mani':46 'name':226 'network':93 'no-api-key' 'offer':48 'one':44 'openapi':182 'page':167 'paid':9,23 'pay':78 'pay-per-call API' 'pay-per-request':77 'payment':40,119,132,137 'per':11,25,79,108 'per-cal':10,24 'per-request-billing' 'platform':52,75,157 'post':148 'premium':4,18,34,102,192 'price':163 'prompt':174 'protocol':41 'provid':33,223 'rate':86 'readm':166 'render':169 'request':80,109,149 'request/response':185 'respons':153 'return':151,196,206 'schema':183 'scheme':126 'settlement':89 'sign':136 'spars':160 'specif':97,220 'specifi':140 'subscript':221 'unclear':216 'unit':113 'usdc':14,28,95,115 'usdc-settlement' 'use':94 'util':70 'valid':208 'varieti':56 'via':37,122 'wallet':141,173 'web3':67 'without':212 'x':131 'x-payment':130 'x402':2,16,39,124 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"9c7cb9e5-1886-40ae-ae0e-39a7fa56e905","listingId":"aa73bd3c-bb03-4d83-878c-8d64d635766f","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/74","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:47.016Z"}],"sources":[{"listingId":"aa73bd3c-bb03-4d83-878c-8d64d635766f","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/74","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:47.016Z","lastSeenAt":"2026-04-22T12:04:25.423Z"}],"details":{"listingId":"aa73bd3c-bb03-4d83-878c-8d64d635766f","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/74 \\\n  -H \"X-PAYMENT: <signed-x402-payment>\" \\\n  -H \"Content-Type: application/json\"","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 of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/74"},{"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 endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, pricing, API, and README pages render only a 'Connect wallet' prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing premium API functionality with per-request USDC micropayments","Agent-driven API consumption without pre-registration or API keys","Programmatic access to subscription-related data or services"],"bestFor":["Developers who want keyless, pay-per-use API access","AI agents that can handle x402 payment challenges natively","Users comfortable paying in USDC on Base L2"],"notFor":["Users who need detailed API documentation before integrating","Applications requiring free or fiat-only payment methods","Production systems that need SLA guarantees or support"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:48.794Z"},"updatedAt":"2026-04-22T12:04:25.423Z"}}