{"id":"a4e39978-939b-466a-b1b4-0084a3300a2e","shortId":"AEwACV","kind":"x402","title":"Premium API access on lowpaymentfee.com, paid per-request via x402 on Base with USDC.","tagline":"Premium API access on lowpaymentfee.com, paid per-request via x402 on Base with 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. Most endpoints on the platform are priced at $0.02 per request, but this particular endpoint (/api/v1/stripe/subscriptions/19) advertises a maximum cost of $0.02 USDC (20,000 base units of USDC on Base, which has 6 decimals) per call.\n\nThe endpoint is live and returns a valid x402 challenge (HTTP 402) when called via POST without payment. Payment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) with the \"exact\" payment scheme. The response MIME type is application/json. No API keys or rate limits are advertised; access is gated entirely by the x402 payment header.\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 schema, no request/response examples, and no detailed description of what \"Premium API Access\" actually returns or what input parameters it expects. The endpoint path suggests it may relate to Stripe subscription management, but this is speculative. Prospective users should test the endpoint to understand its actual functionality before relying on it.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","per-request-pricing","json-response","post-method"],"categories":["api-gateway","payments"],"synonyms":["lowpaymentfee","premium api","x402 api","pay-per-request api","USDC api access","base network api","stripe subscriptions api"],"warnings":["No documentation available; all doc pages return only 'Connect wallet'","No OpenAPI or input/output schema provided","The actual functionality of 'Premium API Access' is undefined in available materials","Endpoint path suggests Stripe subscription management but this is unconfirmed","No request or response examples available"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/19","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/19","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 documentation is essentially nonexistent—every doc page returns only 'Connect wallet'. There is no OpenAPI schema, no request/response examples, and no clear description of what the endpoint actually does beyond the generic label 'Premium API Access'. The endpoint path referencing 'stripe/subscriptions' is 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'/api/v1/stripe/subscriptions/19':88 '/docs':173 '/pricing':175 '/readme':177 '0.02':81,94 '000':97 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':138 '20':96 '402':121 '6':106 'USDC api access' 'access':3,18,38,158,206 'actual':207,239 'advertis':89,157 'ai':65 'analyt':64 'api':2,17,37,60,151,205 'application/json':149 'base':13,28,98,103,133 'base network api' 'base-network' 'call':109,123 'categori':61 'challeng':119 'connect':183 'content':189 'contract':137 'cost':92 'crawl':172 'data':63 'decim':107 'descript':201 'detail':200 'document':167 'endpoint':32,49,74,87,111,216,235 'entir':161 'exact':141 'exampl':197 'expect':214 'extrem':169 'financ':68 'function':240 'gate':160 'header':166 'host':56 'http':120 'includ':62 'infrastructur':71 'input':211 'json-response' 'key':152 'learn':67 'limit':155 'live':113 'lowpaymentfee' 'lowpaymentfee.com':5,20,34,53 'machin':66 'manag':225 'mani':48 'maximum':91 'may':220 'mime':146 'network':134 'offer':50 'one':46 'openapi':193 'page':178 'paid':6,21 'paramet':212 'particular':86 'path':217 'pay-per-request api' 'payment':42,127,128,142,165 'per':8,23,82,108 'per-request':7,22 'per-request-pricing' 'platform':54,77 'post':125 'post-method' 'premium':1,16,36,204 'premium api' 'price':79 'prompt':185 'prospect':230 'protocol':43 'provid':35 'rate':154 'relat':221 'reli':242 'request':9,24,83 'request/response':196 'respons':145 'return':115,180,208 'schema':194 'scheme':143 'settl':130 'spars':170 'specul':229 'stripe':223 'stripe subscriptions api' 'subscript':224 'substant':188 'suggest':218 'test':233 'type':147 'understand':237 'unit':99 'usdc':15,30,95,101,136 'usdc-settlement' 'use':135 'user':231 'util':72 'valid':117 'varieti':58 'via':10,25,39,124 'wallet':184 'web3':69 'without':126 'x402':11,26,41,118,164 'x402 api' 'x402-payment'","prices":[{"id":"c167d217-1825-46e1-9ec1-e0eff60e9d58","listingId":"a4e39978-939b-466a-b1b4-0084a3300a2e","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/19","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:45.806Z"}],"sources":[{"listingId":"a4e39978-939b-466a-b1b4-0084a3300a2e","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/19","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:45.806Z","lastSeenAt":"2026-04-22T11:32:12.555Z"}],"details":{"listingId":"a4e39978-939b-466a-b1b4-0084a3300a2e","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/19 \\\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","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/19"},{"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 asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/19"},{"claim":"The platform offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing a premium API endpoint with per-request USDC micropayments on Base","Agent-driven API consumption without API keys or subscriptions","Programmatic access to a Stripe-related subscription resource via x402"],"bestFor":["Developers wanting keyless, pay-per-call API access","AI agents that can settle x402 payments on Base","Users who prefer crypto micropayments over traditional API subscriptions"],"notFor":["Users who need detailed API documentation before integrating","Anyone requiring non-crypto payment methods","Production use cases requiring guaranteed SLAs or support"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:48.805Z"},"updatedAt":"2026-04-22T11:32:12.555Z"}}