{"id":"54406511-8ce0-4028-b334-205b44e85d10","shortId":"veFMTh","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. The specific resource path (`/api/v1/stripe/subscriptions/112`) suggests a subscription-related API, though the exact data or functionality returned after payment is not documented beyond the title. Payment is settled on the Base network using USDC (contract 0x8335…2913) via the x402 \"exact\" scheme.\n\nThe x402 challenge indicates a maximum amount of 20,000 base units of USDC. Since USDC uses 6 decimals, this converts to $0.02 per request — consistent with the site's advertised flat pricing of $0.02/request across all endpoints. The provider advertises no API keys, no rate limits, and instant access. The endpoint accepts HTTP POST requests.\n\nThe broader lowpaymentfee.com platform offers a range of x402-gated APIs spanning data/analytics, AI/ML (sentiment, summarization, classification, embeddings), finance/Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). However, this specific listing covers only the `/api/v1/stripe/subscriptions/112` endpoint. Documentation beyond the landing page is essentially empty (all doc pages just show \"Connect wallet\"), so the actual request/response schema for this endpoint is unknown.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","per-call-pricing","http-post","subscription-api"],"categories":["payments","api-infrastructure"],"synonyms":["x402 API","pay-per-call API","USDC micropayment","Base network API","subscription endpoint","lowpaymentfee"],"warnings":["No documentation available — all doc pages return only 'Connect wallet' with no content","Request body schema and response schema are completely unknown","The endpoint path suggests Stripe subscription functionality but no details are provided","Cannot verify what data or service is actually delivered after payment"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/112","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/112","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no documentation of request parameters, response schema, or what data this endpoint actually returns. All doc/pricing/API pages are gated behind a wallet connect with no content. This is effectively a stub 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'/request':119 '0.02':106,118 '000':93 '0x8335':77 '20':92 '2913':78 '6':101 'Base network API' 'USDC micropayment' 'accept':137 'access':6,20,36,134 'across':120 'actual':202 'advertis':114,125 'ai/ml':155 'amount':90 'api':5,19,35,51,127,152 'base':8,22,72,94 'base-network' 'behind':37 'beyond':64,186 'broader':142 'call':12,26 'challeng':86 'classif':158 'connect':198 'consist':109 'contract':76 'convers':174 'convert':104 'cover':180 'data':55 'data/analytics':154 'decim':102 'doc':194 'document':63,185 'embed':159 'empti':192 'endpoint':30,122,136,184,207 'essenti':191 'estim':168 'exact':54,82 'exchang':163 'feed':162 'finance/web3':160 'flat':115 'function':57 'gas':167 'gate':3,17,151 'generat':175 'geocod':172 'howev':176 'http':138 'http-post' 'indic':87 'infrastructur':170 'instant':133 'key':128 'land':188 'limit':131 'list':179 'lowpaymentfee' 'lowpaymentfee.com':32,143 'maximum':89 'network':73 'offer':145 'page':189,195 'paid':9,23 'path':44 'pay-per-call API' 'payment':60,67 'paywal':40 'per':11,25,107 'per-cal':10,24 'per-call-pricing' 'platform':144 'post':139 'premium':4,18,34 'price':116,161 'provid':33,124 'quot':166 'rang':147 'rate':130,164 'relat':50 'request':108,140 'request/response':203 'resourc':43 'return':58 'schema':204 'scheme':83 'sentiment':156 'settl':69 'show':197 'sinc':98 'site':112 'span':153 'specif':42,178 'subscript':49 'subscription endpoint' 'subscription-api' 'subscription-rel':48 'suggest':46 'summar':157 'though':52 'titl':66 'token':165 'unit':95 'unknown':209 'usdc':14,28,75,97,99 'usdc-settlement' 'use':74,100 'util':171 'valid':173 'via':79 'wallet':199 'x402':2,16,39,81,85,150 'x402 API' 'x402-gated':1,15,149 'x402-payment'","prices":[{"id":"401f2049-95f2-4102-bb92-c3b8f5369a77","listingId":"54406511-8ce0-4028-b334-205b44e85d10","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/112","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:21.089Z"}],"sources":[{"listingId":"54406511-8ce0-4028-b334-205b44e85d10","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/112","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:21.089Z","lastSeenAt":"2026-04-22T18:32:18.002Z"}],"details":{"listingId":"54406511-8ce0-4028-b334-205b44e85d10","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/112 \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The x402 challenge requires payment of 20,000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/112"},{"claim":"The site advertises $0.02/request flat pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages only show 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Programmatic access to a subscription-related resource with per-call USDC micropayments","Agent-driven API consumption without API keys or account setup","Demonstrating x402 payment protocol integration on Base"],"bestFor":["Developers experimenting with x402 payment flows","Agents that need keyless, pay-per-call API access on Base","Low-volume consumers who want no-commitment pricing"],"notFor":["Users needing detailed API documentation or guaranteed SLAs","High-throughput use cases where $0.02/call adds up significantly","Anyone requiring non-crypto payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:50.025Z"},"updatedAt":"2026-04-22T18:32:18.002Z"}}