{"id":"c9e4ef8d-55b9-4ac3-b9cd-6a8d203ae68b","shortId":"wfwMLx","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 part of a broader platform offering multiple API categories — 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/185` is labeled \"Premium API Access\" and requires a maximum payment of 20,000 base units of USDC (0.02 USD per request, since USDC uses 6 decimals). The x402 challenge confirms the endpoint is live, accepts POST requests, and pays to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using the USDC contract on Base (`0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`). The payment scheme is \"exact\" with a 300-second timeout.\n\nDocumentation is extremely sparse. The crawled docs, API, pricing, and README pages all returned only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI spec, no request/response schema, and no description of what this particular endpoint actually returns or what input it expects. The endpoint path suggests it may relate to Stripe subscription management, but this is speculative. The platform advertises no API keys, no rate limits, and instant access across all its endpoints.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","per-call-pricing","post-method"],"categories":["api-gateway","payments"],"synonyms":["x402 API","pay-per-call API","USDC API access","Base network API","lowpaymentfee","micropayment API","crypto-gated API"],"warnings":["No documentation available — all doc pages return only 'Connect wallet' with no content","No OpenAPI or request/response schema provided; input and output formats are unknown","The endpoint path references 'stripe/subscriptions' but no explanation of its actual functionality exists","Cannot verify what data or service this endpoint provides"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/185","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/185","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but there is no documentation, no OpenAPI spec, no request/response schema, and no explanation of what the endpoint actually does beyond the label 'Premium API Access'. The docs pages are empty. This is effectively a stub 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'0.02':97 '000':92 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':121 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':128 '20':91 '300':136 '6':104 'Base network API' 'USDC API access' 'accept':114 'access':6,20,36,84,211 'across':212 'actual':178 'address':120 'advertis':202 'ai':54 'analyt':53 'api':5,19,35,50,83,146,204 'base':8,22,70,93,127 'base-network' 'behind':37 'broader':46 'call':12,26 'categori':51 'challeng':108 'confirm':109 'connect':155 'content':161 'contract':125 'crawl':144 'crypto-gated API' 'data':52 'decim':105 'descript':172 'doc':145 'document':139 'endpoint':30,78,111,177,186,215 'exact':133 'expect':184 'extrem':141 'financ':57 'gate':3,17,63 'infrastructur':60 'input':182 'instant':210 'key':205 'label':81 'learn':56 'limit':208 'live':113 'lowpaymentfee' 'lowpaymentfee.com':32 'machin':55 'manag':195 'maximum':88 'may':190 'micropayment API' 'multipl':49 'network':71 'offer':48 'openapi':165 'page':150 'paid':9,23 'part':43 'particular':176 'path':187 'pay':118 'pay-per-call API' 'payment':89,130 'paywal':40 'per':11,25,99 'per-cal':10,24 'per-call-pricing' 'platform':47,201 'post':115 'post-method' 'premium':4,18,34,82 'price':147 'prompt':157 'protocol':67 'provid':33 'rate':207 'readm':149 'relat':191 'request':100,116 'request/response':168 'requir':86 'return':152,179 'schema':169 'scheme':131 'second':137 'settl':73 'sinc':101 'spars':142 'spec':166 'specif':77 'specul':199 'stripe':193 'subscript':194 'substant':160 'suggest':188 'timeout':138 'unit':94 'usd':98 'usdc':14,28,75,96,102,124 'usdc-settlement' 'use':103,122 'util':61 'via':64 'wallet':156 'web3':58 'x402':2,16,39,66,107 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"52a64c8b-b35a-4e20-af4f-af1f6b4c09b4","listingId":"c9e4ef8d-55b9-4ac3-b9cd-6a8d203ae68b","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/185","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:41.574Z"}],"sources":[{"listingId":"c9e4ef8d-55b9-4ac3-b9cd-6a8d203ae68b","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/185","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:41.574Z","lastSeenAt":"2026-04-22T13:31:38.380Z"}],"details":{"listingId":"c9e4ef8d-55b9-4ac3-b9cd-6a8d203ae68b","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/185 \\\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/185"},{"claim":"The platform advertises $0.02 per request, no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/185"}],"useCases":["Accessing premium API functionality with per-request USDC micropayments on Base","Agent-driven API consumption without API keys or subscriptions","Programmatic access to gated services using x402 payment protocol"],"bestFor":["Developers wanting keyless, pay-per-use API access","AI agents that can settle x402 payments in USDC on Base","Users who prefer crypto micropayments over traditional subscriptions"],"notFor":["Users needing detailed API documentation or schemas before integrating","Anyone without a Base-compatible USDC wallet","High-volume consumers who need bulk pricing or rate guarantees"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:48.95Z"},"updatedAt":"2026-04-22T13:31:38.380Z"}}