{"id":"8b9baeb0-0ce0-4aaf-821c-83b8a3e20cbc","shortId":"7G6jcJ","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. The endpoint is live and returns a standard x402 challenge requiring payment in USDC on the Base network. The maximum amount required per call is 20,000 base units of USDC (6 decimals), which equals $0.02 per request.\n\nThe provider's landing page advertises a broad catalog of API endpoints spanning data & analytics (metrics, reports, data export, insights), AI & machine learning (sentiment analysis, text summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at $0.02 per request with no API keys, no rate limits, and instant access via the Base network.\n\nHowever, the specific endpoint being listed here (`/api/v1/stripe/subscriptions/187`) does not appear in the provider's public catalog and its exact functionality is unclear. The path suggests it may relate to Stripe subscription management, but no documentation, request schema, or response schema is available. The docs, API, pricing, and README pages all returned only a \"Connect wallet\" prompt with no substantive content. Without further documentation, the actual behavior of this endpoint remains unknown.","tags":[],"capabilities":["x402-payment","usdc-base","per-request-billing","premium-api-access"],"categories":["api-gateway","payments"],"synonyms":["x402 API","pay-per-request API","USDC API access","Base network API","lowpaymentfee","crypto-paid API","stripe subscription endpoint"],"warnings":["The endpoint path /api/v1/stripe/subscriptions/187 does not appear in the provider's public API catalog — its actual functionality is unknown.","No request or response schema is available; behavior must be discovered experimentally.","All documentation pages (docs, API, pricing, README) returned only a 'Connect wallet' prompt with no content.","The endpoint name 'Premium API Access' is generic and does not describe specific functionality."],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/187","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/187","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 request/response schema, and the specific endpoint path does not appear in the provider's own catalog. The docs pages are empty (wallet-connect only). Effectively a stub 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'0.02':76,130 '000':67 '20':66 '6':72 'Base network API' 'USDC API access' 'access':6,20,36,142 'actual':212 'advertis':84 'ai':99 'amount':61 'analysi':103 'analyt':93 'api':5,19,35,89,135,192 'appear':157 'avail':189 'base':8,22,57,68,145 'behavior':213 'behind':37 'broad':86 'call':64 'catalog':87,163 'challeng':50 'classif':106 'connect':201 'content':207 'convers':123 'crypto-paid API' 'data':92,96 'decim':73 'doc':191 'document':182,210 'embed':107 'endpoint':30,42,90,126,150,216 'equal':75 'estim':117 'exact':166 'exchang':112 'export':97 'feed':111 'financ':108 'function':167 'gas':116 'gate':3,17 'generat':124 'geocod':121 'howev':147 'infrastructur':119 'insight':98 'instant':141 'key':136 'land':82 'learn':101 'limit':139 'list':128,152 'live':44 'lowpaymentfee' 'lowpaymentfee.com':32 'machin':100 'manag':179 'maximum':60 'may':174 'metric':94 'network':58,146 'page':83,196 'paid':9,23 'path':171 'pay-per-request API' 'payment':52 'paywal':40 'per':11,25,63,77,131 'per-request':10,24 'per-request-billing' 'premium':4,18,34 'premium-api-access' 'price':110,193 'prompt':203 'provid':33,80,160 'public':162 'quot':115 'rate':113,138 'readm':195 'relat':175 'remain':217 'report':95 'request':12,26,78,132,183 'requir':51,62 'respons':186 'return':46,198 'schema':184,187 'sentiment':102 'span':91 'specif':149 'standard':48 'stripe':177 'stripe subscription endpoint' 'subscript':178 'substant':206 'suggest':172 'summar':105 'text':104 'token':114 'unclear':169 'unit':69 'unknown':218 'usdc':14,28,54,71 'usdc-base' 'util':120 'valid':122 'via':143 'wallet':202 'web3':109 'without':208 'x402':2,16,39,49 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"518314a4-9387-4847-87e4-1f9d9bb6914c","listingId":"8b9baeb0-0ce0-4aaf-821c-83b8a3e20cbc","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/187","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:43.998Z"}],"sources":[{"listingId":"8b9baeb0-0ce0-4aaf-821c-83b8a3e20cbc","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/187","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:43.998Z","lastSeenAt":"2026-04-22T13:31:38.478Z"}],"details":{"listingId":"8b9baeb0-0ce0-4aaf-821c-83b8a3e20cbc","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/187 \\\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 x402 challenge requires a maximum of 20,000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on the Base network, equaling $0.02 per request.","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/187"},{"claim":"The provider 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 provider lists endpoints across data & analytics, AI & ML, finance & Web3, and infrastructure categories.","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic access to a premium API endpoint with per-call USDC payment on Base","Agent-driven API consumption without API keys or account setup","Accessing gated services via x402 protocol"],"bestFor":["Developers or agents wanting keyless, pay-per-call API access","x402-compatible clients on the Base network","Low-friction API consumption without subscriptions or rate limits"],"notFor":["Users needing detailed API documentation or guaranteed SLAs","Anyone without a Base-network USDC wallet","Use cases requiring known, well-documented request/response schemas"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:48.833Z"},"updatedAt":"2026-04-22T13:31:38.478Z"}}