{"id":"9e2c93c7-0017-4329-a009-10d679c236ec","shortId":"mhZyu3","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/63` is labeled \"Premium API Access\" and returns a valid x402 challenge requesting up to 0.02 USDC (20,000 base units of USDC with 6 decimals) per call. The payment is settled on the Base L2 network to the specified wallet address. The endpoint accepts POST requests and returns application/json responses. However, the exact functionality behind this particular \"Premium API Access\" endpoint is not documented — the name suggests it may relate to Stripe subscription management, but no schema, request/response examples, or detailed documentation are available.\n\nThe platform's docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no substantive content, so there is very limited information about what this specific endpoint actually does, what inputs it expects, or what outputs it returns. The broader platform advertises endpoints at $0.02/request across all categories, consistent with the x402 challenge captured here.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","per-call-pricing","json-response","post-method"],"categories":["api-gateway","payments"],"synonyms":["premium API","x402 API","pay-per-call API","USDC API access","lowpaymentfee","Base network API","stripe subscriptions API"],"warnings":["No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet' with no content.","The exact functionality of '/api/v1/stripe/subscriptions/63' is unknown; the name suggests Stripe subscription management but this is unconfirmed.","No input or output schema is provided beyond the basic outputSchema indicating POST with JSON.","No example requests or responses are available anywhere in the crawled material."],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/63","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/63","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 there is no documentation, no request/response schema, and no clear description of what 'Premium API Access' actually provides. The docs pages are empty (wallet-connect only). This is effectively a stub 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'/request':232 '0.02':114,231 '000':117 '20':116 '6':123 'Base network API' 'USDC API access' 'accept':143 'access':6,20,36,104,159 'across':233 'actual':214 'address':140 'advertis':228 'ai':63 'analyt':62 'api':5,19,35,58,83,103,158,190 'application/json':148 'avail':183 'base':8,22,92,118,133 'base-network' 'behind':154 'broader':226 'call':12,26,126 'captur':241 'categori':59,235 'challeng':110,240 'connect':196 'consist':236 'content':202 'data':61 'decim':124 'detail':180 'doc':187 'document':163,181 'endpoint':30,47,72,98,142,160,213,229 'exact':152 'exampl':178 'expect':219 'financ':66 'function':153 'gate':3,17 'host':54 'howev':150 'includ':60 'inform':208 'infrastructur':69 'input':217 'json-response' 'key':84 'l2':134 'label':101 'learn':65 'limit':87,207 'lowpaymentfee' 'lowpaymentfee.com':32,51 'machin':64 'manag':173 'mani':46 'may':168 'name':165 'network':93,135 'offer':48 'one':44 'output':222 'page':191 'paid':9,23 'particular':156 'pay':78 'pay-per-call API' 'pay-per-request':77 'payment':40,128 'per':11,25,79,125 'per-cal':10,24 'per-call-pricing' 'platform':52,75,185,227 'post':144 'post-method' 'premium':4,18,34,102,157 'premium API' 'price':188 'prompt':198 'protocol':41 'provid':33 'rate':86 'relat':169 'render':193 'request':80,111,145 'request/response':177 'respons':149 'return':106,147,224 'schema':176 'settl':130 'settlement':89 'specif':97,212 'specifi':138 'stripe':171 'stripe subscriptions API' 'subscript':172 'substant':201 'suggest':166 'unit':119 'usdc':14,28,95,115,121 'usdc-settlement' 'use':94 'util':70 'valid':108 'varieti':56 'via':37 'wallet':139,197 'web3':67 'x402':2,16,39,109,239 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"724dd07e-2d11-44c0-9cdb-68493e61dc8b","listingId":"9e2c93c7-0017-4329-a009-10d679c236ec","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/63","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:48.851Z"}],"sources":[{"listingId":"9e2c93c7-0017-4329-a009-10d679c236ec","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/63","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:48.851Z","lastSeenAt":"2026-04-22T12:04:25.515Z"}],"details":{"listingId":"9e2c93c7-0017-4329-a009-10d679c236ec","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/63 \\\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":"The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Base network.","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/63"},{"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":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network.","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/63"},{"claim":"Platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories.","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing a premium API endpoint with per-call USDC micropayments","Agent-driven API consumption without API keys or subscriptions","Programmatic access to services gated behind x402 payment challenges"],"bestFor":["Developers wanting keyless, pay-per-use API access","AI agents that can settle x402 payments on Base","Users who prefer crypto micropayments over traditional API subscriptions"],"notFor":["Users needing detailed API documentation or schemas before integrating","Anyone requiring fiat-only payment methods","High-volume use cases where per-call pricing may not be cost-effective compared to bulk plans"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:48.599Z"},"updatedAt":"2026-04-22T12:04:25.515Z"}}