{"id":"bd723a6c-955f-4bd0-9ab2-040023c47878","shortId":"UMK3fh","kind":"x402","title":"x402-gated premium API access on Base, paid per-request in USDC.","tagline":"x402-gated premium API access on Base, paid per-request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" behind an x402 paywall. 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 use the x402 protocol on the Base network, accepting USDC payments with no API keys or rate limits required.\n\nThe specific endpoint `/api/v1/stripe/subscriptions/153` is labeled \"Premium API Access\" in the x402 challenge. Its maximum payment is 20,000 base units of USDC (which equals $0.02 given USDC's 6 decimals). The endpoint accepts POST requests and returns application/json. However, the exact functionality behind this particular subscription endpoint is not documented — the name suggests it may relate to Stripe subscription management, but no schema, request parameters, or response format are provided in the available documentation.\n\nThe platform's landing page lists a flat $0.02/request pricing model across all endpoints, with no minimums, no commitments, and instant access. Documentation pages (/docs, /api, /pricing, /README) all returned only a \"Connect wallet\" prompt with no substantive content, so detailed usage instructions and schemas are unavailable.","tags":[],"capabilities":["x402-payment","usdc-payment","base-network","per-request-billing","no-api-key","json-response","post-method"],"categories":["api-gateway","payments"],"synonyms":["premium API","x402 API","pay-per-request API","USDC API access","lowpaymentfee","Base network API","crypto-paid API"],"warnings":["No documentation available — all doc pages return only 'Connect wallet' with no content","The exact functionality of /api/v1/stripe/subscriptions/153 is unknown; the name suggests Stripe subscription management but this is unconfirmed","No request or response schema is provided","No examples or error handling documentation available"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/153","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/153","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02/request in USDC on Base). However, there is no documentation, no request/response schema, and no explanation of what \"Premium API Access\" actually returns. The docs, API, pricing, and README pages are all blank beyond a wallet-connect 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'/api/v1/stripe/subscriptions/153':97 '/docs':194 '/pricing':196 '/readme':197 '/request':178 '0.02':119,177 '000':112 '20':111 '6':123 'Base network API' 'USDC API access' 'accept':83,127 'access':6,20,36,102,191 'across':181 'ai':62 'analyt':61 'api':5,19,35,57,88,101 'application/json':132 'avail':167 'base':8,22,81,113 'base-network' 'behind':37,137 'categori':58 'challeng':106 'commit':188 'connect':202 'content':208 'crypto-paid API' 'data':60 'decim':124 'detail':210 'document':144,168,192 'endpoint':30,46,71,96,126,141,183 'equal':118 'exact':135 'financ':65 'flat':176 'format':162 'function':136 'gate':3,17 'given':120 'host':53 'howev':133 'includ':59 'infrastructur':68 'instant':190 'instruct':212 'json-response' 'key':89 'label':99 'land':172 'learn':64 'limit':92 'list':174 'lowpaymentfee' 'lowpaymentfee.com':32,50 'machin':63 'manag':154 'mani':45 'maximum':108 'may':149 'minimum':186 'model':180 'name':146 'network':82 'no-api-key' 'offer':47 'one':43 'page':173,193 'paid':9,23 'paramet':159 'particular':139 'pay-per-request API' 'payment':85,109 'paywal':40 'per':11,25 'per-request':10,24 'per-request-billing' 'platform':51,74,170 'post':128 'post-method' 'premium':4,18,34,100 'premium API' 'price':179 'prompt':204 'protocol':78 'provid':33,164 'rate':91 'relat':150 'request':12,26,129,158 'requir':93 'respons':161 'return':131,199 'schema':157,214 'specif':95 'stripe':152 'subscript':140,153 'substant':207 'suggest':147 'unavail':216 'unit':114 'usag':211 'usdc':14,28,84,116,121 'usdc-payment' 'use':75 'util':69 'varieti':55 'wallet':203 'web3':66 'x402':2,16,39,77,105 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"293b815c-0fbc-454a-ab90-cc8060f67c2e","listingId":"bd723a6c-955f-4bd0-9ab2-040023c47878","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/153","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:31.281Z"}],"sources":[{"listingId":"bd723a6c-955f-4bd0-9ab2-040023c47878","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/153","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:31.281Z","lastSeenAt":"2026-04-22T16:31:56.210Z"}],"details":{"listingId":"bd723a6c-955f-4bd0-9ab2-040023c47878","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/153 \\\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 402 challenge with x402Version 1, accepting USDC on Base network with maxAmountRequired of 20000 base units ($0.02)","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/153"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on the 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":"Documentation pages (/docs, /api, /pricing, /README) contain only a 'Connect wallet' prompt with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing premium API functionality with per-call USDC micropayments","Agent-driven API consumption without pre-registration or API keys","Programmatic subscription or premium-tier access via x402 protocol"],"bestFor":["Developers wanting key-less, pay-per-use API access on Base","AI agents that can settle x402 payments autonomously","Users who prefer crypto micropayments over traditional billing"],"notFor":["Users needing detailed API documentation or schemas before purchasing","Anyone without a Base-network USDC wallet","High-volume consumers who need bulk pricing or SLAs"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:49.482Z"},"updatedAt":"2026-04-22T16:31:56.210Z"}}