{"id":"cc258200-4de4-4a33-b28f-a0b2deae4fbd","shortId":"dJURyw","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 payment wall. The endpoint is located at `/api/v1/stripe/subscriptions/64` and accepts POST requests. Payment is settled on the Base network using USDC (contract 0x8335…2913) via the x402 \"exact\" scheme.\n\nThe x402 challenge advertises a maxAmountRequired of 20,000 base units. Since USDC uses 6 decimals, this translates to $0.02 per request, consistent with the site's stated pricing of $0.02/request across all its endpoints. The provider advertises no API keys, no rate limits, and instant access.\n\nThe broader lowpaymentfee.com platform offers multiple API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities. However, this specific endpoint (`/api/v1/stripe/subscriptions/64`) is labeled \"Premium API Access\" without further documentation on what data or functionality it returns. The docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no additional content. Without request/response schemas or documentation beyond the endpoint title, the actual behavior of this endpoint remains unclear.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","per-request-pricing","post-method"],"categories":["api-gateway","payments"],"synonyms":["x402 API","pay-per-request API","USDC API access","Base network API","lowpaymentfee","crypto-paid API","micropayment API"],"warnings":["No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet' with no content.","The endpoint name 'stripe/subscriptions/64' suggests a subscription model but the x402 challenge uses per-request exact payment — purpose is unclear.","No request body schema or response schema documented; actual functionality of this endpoint is unknown.","No OpenAPI spec or ai-plugin manifest found."],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/64","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/64","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no documentation, no request/response schema, and no explanation of what \"Premium API Access\" actually returns. The docs/pricing/README pages are all empty beyond a wallet connect 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'/request':100 '0.02':88,99 '000':77 '0x8335':62 '20':76 '2913':63 '6':83 'Base network API' 'USDC API access' 'accept':49 'access':6,20,36,116,145 'across':101 'actual':184 'addit':172 'advertis':72,107 'ai':128 'analyt':127 'api':5,19,35,109,123,144,159 'base':8,22,57,78 'base-network' 'behavior':185 'behind':37 'beyond':179 'broader':118 'categori':124 'challeng':71 'connect':167 'consist':91 'content':173 'contract':61 'crypto-paid API' 'data':126,151 'decim':84 'doc':157 'document':148,178 'endpoint':30,43,104,139,181,188 'exact':67 'financ':131 'function':153 'gate':3,17 'howev':136 'includ':125 'infrastructur':134 'instant':115 'key':110 'label':142 'learn':130 'limit':113 'locat':45 'lowpaymentfee' 'lowpaymentfee.com':32,119 'machin':129 'maxamountrequir':74 'micropayment API' 'multipl':122 'network':58 'offer':121 'page':162 'paid':9,23 'pay-per-request API' 'payment':40,52 'per':11,25,89 'per-request':10,24 'per-request-pricing' 'platform':120 'post':50 'post-method' 'premium':4,18,34,143 'price':97,158 'prompt':169 'provid':33,106 'rate':112 'readm':161 'remain':189 'render':164 'request':12,26,51,90 'request/response':175 'return':155 'schema':176 'scheme':68 'settl':54 'sinc':80 'site':94 'specif':138 'state':96 'titl':182 'translat':86 'unclear':190 'unit':79 'usdc':14,28,60,81 'usdc-settlement' 'use':59,82 'util':135 'via':64 'wall':41 'wallet':168 'web3':132 'without':146,174 'x402':2,16,39,66,70 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"7ec9915e-d9ad-457d-84e7-c0f0620d799e","listingId":"cc258200-4de4-4a33-b28f-a0b2deae4fbd","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/64","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:53.630Z"}],"sources":[{"listingId":"cc258200-4de4-4a33-b28f-a0b2deae4fbd","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/64","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:53.630Z","lastSeenAt":"2026-04-22T10:32:09.957Z"}],"details":{"listingId":"cc258200-4de4-4a33-b28f-a0b2deae4fbd","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/64\n# Returns 402 with x402 challenge; attach X-PAYMENT header with valid USDC payment proof to proceed.","exampleRequest":null,"exampleResponse":{"error":"X-PAYMENT header is required","accepts":[{"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/64","description":"Premium API Access","maxAmountRequired":"20000","maxTimeoutSeconds":300}],"x402Version":1},"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The x402 challenge advertises maxAmountRequired of 20000 base units in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/64"},{"claim":"The site advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/64"}],"useCases":["Programmatic access to a premium API endpoint with per-call USDC micropayments","Agent-driven workflows that need keyless, pay-as-you-go API consumption","Demonstrating x402 payment protocol integration on Base"],"bestFor":["Developers experimenting with x402 payment flows","Agents that can settle USDC payments on Base","Use cases requiring no-signup, no-API-key access"],"notFor":["Users who need detailed API documentation or guaranteed SLAs","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:48.373Z"},"updatedAt":"2026-04-22T10:32:09.957Z"}}