{"id":"0b34e132-2e8c-4fc8-9703-7abcf35d789f","shortId":"RkcEyw","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 advertises a suite of APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all gated behind x402 micropayments settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/stripe/subscriptions/188` is listed as \"Premium API Access\" and returns a valid x402 challenge (HTTP 402) requesting up to 20,000 base units of USDC (0.02 USD) per call, payable to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base. The endpoint accepts POST requests and returns `application/json`. The x402 challenge uses the \"exact\" payment scheme with a 300-second timeout.\n\nHowever, the actual functionality behind this endpoint is unclear. The path suggests a Stripe subscription resource, but the crawled documentation is extremely sparse — most pages (docs, api, pricing, README) render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no documentation describing what this endpoint returns or what input it expects. The platform's landing page lists many API categories at $0.02/request with claims of no API keys, no rate limits, and instant access, but none of these claims can be independently verified from the available material.","tags":[],"capabilities":["x402-payment","usdc-base","per-call-micropayment","json-response","post-method"],"categories":["api-gateway","payments"],"synonyms":["x402 API","micropayment API","pay-per-call API","USDC gated endpoint","Base network API","lowpaymentfee"],"warnings":["No documentation available — docs, API, pricing, and README pages all render only 'Connect wallet' with no content.","No OpenAPI or schema describing request parameters or response format.","Actual functionality of '/api/v1/stripe/subscriptions/188' is unknown — the path suggests a Stripe subscription resource but no details are provided.","Platform lists many API categories but none can be verified from crawled content.","No examples of successful responses available."],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/188","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/188","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 OpenAPI schema, no request/response examples, and no explanation of what the endpoint actually does. Most site pages are empty beyond a wallet-connect prompt. The listing is effectively a 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'/request':211 '0.02':109,210 '000':104 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':116 '20':103 '300':137 '402':99 'Base network API' 'USDC gated endpoint' 'accept':121 'access':6,20,36,91,223 'actual':142 'address':115 'advertis':54 'ai':62 'analyt':61 'api':5,19,35,58,90,166,207,216 'application/json':126 'avail':235 'base':8,22,80,105,118 'behind':72,144 'call':12,26,112 'categori':208 'challeng':97,129 'claim':213,228 'connect':172 'content':178 'crawl':158 'data':60 'describ':190 'doc':165 'document':159,189 'endpoint':30,47,84,120,146,193 'exact':132 'exampl':186 'expect':199 'extrem':161 'financ':65 'function':143 'gate':3,17,71 'howev':140 'http':98 'independ':231 'infrastructur':68 'input':197 'instant':222 'json-response' 'key':217 'land':203 'learn':64 'limit':220 'list':87,205 'lowpaymentfee' 'lowpaymentfee.com':32,51 'machin':63 'mani':46,206 'materi':236 'micropay':74 'micropayment API' 'network':81 'none':225 'offer':48 'one':44 'openapi':182 'page':164,204 'paid':9,23 'path':150 'pay-per-call API' 'payabl':113 'payment':40,133 'per':11,25,111 'per-cal':10,24 'per-call-micropayment' 'platform':52,201 'post':122 'post-method' 'premium':4,18,34,89 'price':167 'prompt':174 'protocol':41 'provid':33 'rate':219 'readm':168 'render':169 'request':100,123 'request/response':185 'resourc':155 'return':93,125,194 'schema':183 'scheme':134 'second':138 'settl':75 'span':59 'spars':162 'specif':83 'stripe':153 'subscript':154 'suggest':151 'suit':56 'timeout':139 'unclear':148 'unit':106 'usd':110 'usdc':14,28,77,108 'usdc-base' 'use':130 'util':69 'valid':95 'verifi':232 'via':37 'wallet':173 'web3':66 'x402':2,16,39,73,96,128 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"dd6f21ec-a6d2-42b1-83b2-fb4190f4fbbc","listingId":"0b34e132-2e8c-4fc8-9703-7abcf35d789f","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/188","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:41.575Z"}],"sources":[{"listingId":"0b34e132-2e8c-4fc8-9703-7abcf35d789f","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/188","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:41.575Z","lastSeenAt":"2026-04-22T13:31:38.404Z"}],"details":{"listingId":"0b34e132-2e8c-4fc8-9703-7abcf35d789f","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/188 \\\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 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/188"},{"claim":"The platform advertises APIs across data & analytics, AI & ML, finance & Web3, and infrastructure at $0.02/request","source_url":"https://lowpaymentfee.com"},{"claim":"The platform claims no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing a premium API resource with per-call USDC micropayments on Base","Integrating x402-compatible agent workflows that auto-pay for API calls","Testing x402 payment protocol integrations"],"bestFor":["Developers experimenting with x402 micropayment-gated APIs","Agents that can autonomously settle USDC payments on Base","Projects needing keyless, pay-per-use API access"],"notFor":["Users who need detailed API documentation or guaranteed SLAs","Anyone requiring non-crypto payment methods","Production workloads requiring well-documented, stable APIs"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:49.029Z"},"updatedAt":"2026-04-22T13:31:38.404Z"}}