{"id":"1064eac1-a9cd-4e44-889b-28b1bf57165f","shortId":"ZYj2fE","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 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 are pay-per-request with no API keys, no rate limits, and instant access, settled on the Base network using USDC.\n\nThe specific endpoint `/api/v1/stripe/subscriptions/163` is labeled \"Premium API Access\" and costs $0.02 per request (20,000 base units of USDC with 6 decimals). It accepts POST requests and returns JSON. The x402 challenge is live and uses the \"exact\" payment scheme on the Base network, paying to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` with a 300-second timeout.\n\nHowever, the actual functionality behind this specific endpoint is unclear. The name \"Premium API Access\" and the path segment \"stripe/subscriptions/163\" suggest it may relate to subscription management or a Stripe integration, but no documentation, request/response schema, or usage examples are available. The platform's docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no substantive content. Without knowing what this endpoint actually does beyond its label, agents should treat it as an opaque paid endpoint with uncertain functionality.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","per-request-pricing","json-response","post-method"],"categories":["api","payments"],"synonyms":["premium API","x402 endpoint","pay-per-call API","USDC API","lowpaymentfee","Base network API","micropayment API"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content.","The actual functionality of this specific endpoint (/api/v1/stripe/subscriptions/163) is unknown; the label 'Premium API Access' is vague.","No request or response schema is provided; agents cannot know what to send or what they will receive.","The path includes 'stripe/subscriptions' which may imply subscription management, but this is unconfirmed."],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/163","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/163","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 no clarity on what the endpoint actually does. The docs, API, pricing, and README pages are all empty beyond a wallet-connect prompt. This is effectively a stub 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'0.02':109 '000':113 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':146 '20':112 '300':149 '6':119 'Base network API' 'USDC API' 'accept':122 'access':6,20,36,90,106,166 'actual':154,218 'address':145 'agent':223 'ai':63 'analyt':62 'api':5,19,35,58,83,105,165,197 'avail':192 'base':8,22,94,114,141 'base-network' 'behind':156 'beyond':220 'call':12,26 'categori':59 'challeng':130 'connect':206 'content':212 'cost':108 'data':61 'decim':120 'doc':196 'document':185 'endpoint':30,47,72,100,159,217,231 'exact':136 'exampl':190 'financ':66 'function':155,234 'gate':3,17 'host':54 'howev':152 'includ':60 'infrastructur':69 'instant':89 'integr':182 'json':127 'json-response' 'key':84 'know':214 'label':103,222 'learn':65 'limit':87 'live':132 'lowpaymentfee' 'lowpaymentfee.com':32,51 'machin':64 'manag':178 'mani':46 'may':174 'micropayment API' 'name':163 'network':95,142 'offer':48 'one':44 'opaqu':229 'page':201 'paid':9,23,230 'path':169 'pay':78,143 'pay-per-call API' 'pay-per-request':77 'payment':40,137 'per':11,25,79,110 'per-cal':10,24 'per-request-pricing' 'platform':52,75,194 'post':123 'post-method' 'premium':4,18,34,104,164 'premium API' 'price':198 'prompt':208 'protocol':41 'provid':33 'rate':86 'readm':200 'relat':175 'render':203 'request':80,111,124 'request/response':186 'return':126 'schema':187 'scheme':138 'second':150 'segment':170 'settl':91 'specif':99,158 'stripe':181 'stripe/subscriptions/163':171 'subscript':177 'substant':211 'suggest':172 'timeout':151 'treat':225 'uncertain':233 'unclear':161 'unit':115 'usag':189 'usdc':14,28,97,117 'usdc-settlement' 'use':96,134 'util':70 'varieti':56 'via':37 'wallet':207 'web3':67 'without':213 'x402':2,16,39,129 'x402 endpoint' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"54c0a24f-f303-49e2-b422-ea16962c0ccb","listingId":"1064eac1-a9cd-4e44-889b-28b1bf57165f","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/163","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:24.072Z"}],"sources":[{"listingId":"1064eac1-a9cd-4e44-889b-28b1bf57165f","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/163","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:24.072Z","lastSeenAt":"2026-04-22T07:01:26.906Z"}],"details":{"listingId":"1064eac1-a9cd-4e44-889b-28b1bf57165f","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/163 \\\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 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/163"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/163"},{"claim":"Docs, API, pricing, and README pages render only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Paying for premium API access on-demand without API keys","Integrating x402 micropayment-gated endpoints into agent workflows","Accessing paid services on the Base L2 network using USDC"],"bestFor":["Agents that support x402 payment protocol on Base","Users who want keyless, pay-per-request API access","Crypto-native workflows settling in USDC"],"notFor":["Users who need detailed documentation or known response schemas before purchasing","Anyone requiring fiat-only payment methods with no crypto wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:49.843Z"},"updatedAt":"2026-04-22T07:01:26.906Z"}}