{"id":"8856fc07-e9dc-47d1-aec0-b9844c98929f","shortId":"9Kme6x","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 part of a broader platform that offers a variety of pay-per-call APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all gated behind x402 challenges on the Base network and settled in USDC.\n\nThe specific endpoint `/api/v1/stripe/subscriptions/69` is listed as \"Premium API Access\" and returns a valid x402 challenge (HTTP 402) requesting up to $0.02 USDC (20,000 base units with 6 decimals) per call on Base. The payment is sent to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using the USDC contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`. The endpoint accepts POST requests and returns `application/json`.\n\nThe platform advertises a uniform $0.02 per request pricing model with no API keys, no rate limits, no minimums, and instant access. However, documentation pages beyond the landing page are essentially empty (showing only \"Connect wallet\"), so the actual request/response schemas, authentication details, and what data this specific \"Premium API Access\" endpoint returns are unknown. The endpoint path suggests it may relate to Stripe subscription management, but no further details are available from the crawled content.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-call","json-response","post-method"],"categories":["api-gateway","payments"],"synonyms":["x402 API","pay-per-call API","USDC API","Base network API","lowpaymentfee","premium API","crypto-paid API"],"warnings":["Documentation pages (/docs, /api, /pricing, /README) all render as empty 'Connect wallet' pages with no usable content.","The actual request body schema and response format for this endpoint are completely unknown.","The endpoint path references 'stripe/subscriptions' but no explanation of what this returns or does is available.","No OpenAPI or machine-readable schema is provided."],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/69","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/69","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, documentation pages are empty, there is no OpenAPI schema, no request/response examples, and the actual functionality of this specific endpoint is unclear from the available material. The endpoint path ('stripe/subscriptions/69') is 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'0.02':104,142 '000':107 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':123 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':128 '20':106 '402':100 '6':111 'Base network API' 'USDC API' 'accept':131 'access':6,20,36,92,158,187 'actual':175 'address':122 'advertis':139 'ai':62 'analyt':61 'api':5,19,35,58,91,149,186 'application/json':136 'authent':178 'avail':208 'base':8,22,77,108,116 'base-network' 'behind':72 'beyond':162 'broader':47 'call':12,26,57,114 'challeng':74,98 'connect':171 'content':212 'contract':127 'crawl':211 'crypto-paid API' 'data':60,182 'decim':112 'detail':179,206 'document':160 'empti':168 'endpoint':30,85,130,188,193 'essenti':167 'financ':65 'gate':3,17,71 'howev':159 'http':99 'infrastructur':68 'instant':157 'json-response' 'key':150 'land':164 'learn':64 'limit':153 'list':88 'lowpaymentfee' 'lowpaymentfee.com':32 'machin':63 'manag':202 'may':197 'minimum':155 'model':146 'network':78 'offer':50 'page':161,165 'paid':9,23 'part':44 'path':194 'pay':55 'pay-per-cal':54 'pay-per-call' 'pay-per-call API' 'payment':40,118 'per':11,25,56,113,143 'per-cal':10,24 'platform':48,138 'post':132 'post-method' 'premium':4,18,34,90,185 'premium API' 'price':145 'protocol':41 'provid':33 'rate':152 'relat':198 'request':101,133,144 'request/response':176 'return':94,135,189 'schema':177 'sent':120 'settl':80 'show':169 'span':59 'specif':84,184 'stripe':200 'subscript':201 'suggest':195 'uniform':141 'unit':109 'unknown':191 'usdc':14,28,82,105,126 'usdc-settlement' 'use':124 'util':69 'valid':96 'varieti':52 'via':37 'wallet':172 'web3':66 'x402':2,16,39,73,97 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"1f03f94f-9f70-4317-9353-a3ef38379117","listingId":"8856fc07-e9dc-47d1-aec0-b9844c98929f","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/69","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:53.015Z"}],"sources":[{"listingId":"8856fc07-e9dc-47d1-aec0-b9844c98929f","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/69","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:53.015Z","lastSeenAt":"2026-04-22T10:32:09.933Z"}],"details":{"listingId":"8856fc07-e9dc-47d1-aec0-b9844c98929f","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/69 \\\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 in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/69"},{"claim":"The platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC contract address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/69"},{"claim":"Documentation pages render only 'Connect wallet' with no usable content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing premium API functionality with per-call USDC micropayments","Agent-driven API consumption without API keys or subscriptions","Programmatic access to services gated by x402 payment challenges"],"bestFor":["Developers wanting keyless, pay-as-you-go API access","AI agents that can settle x402 payments on Base","Users who prefer crypto micropayments over traditional subscriptions"],"notFor":["Users who need detailed API documentation before integrating","Applications requiring free or fiat-only payment methods","High-volume use cases where per-call pricing may not be economical"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:48.453Z"},"updatedAt":"2026-04-22T10:32:09.933Z"}}