{"id":"d0b9aa85-3eb2-487b-b34a-4ac58c743dce","shortId":"nLLKsy","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 pay-per-request APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints on the platform use the x402 protocol to gate access, settling payments in USDC on the Base network.\n\nThe specific endpoint `/api/v1/stripe/subscriptions/72` is labeled \"Premium API Access\" and costs up to $0.02 per request (20,000 base units of USDC with 6 decimals). The endpoint accepts POST requests and returns JSON. Payment is made via an X-PAYMENT header containing an x402 payment proof; no API keys or accounts are required. The platform advertises no rate limits and instant access.\n\nDocumentation is extremely sparse — the docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what \"Premium API Access\" actually returns or what input it expects. The endpoint is live (returning a proper 402 challenge), but without documentation it is unclear what functionality this specific route provides beyond its generic label.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","per-request-pricing","no-api-key","json-response","post-method"],"categories":["api-gateway","payments"],"synonyms":["x402 API","pay-per-call API","USDC API access","lowpaymentfee","Base network API","crypto-paid API","402 payment API"],"warnings":["No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet' with no content","No OpenAPI or schema describing request parameters or response format","The endpoint name 'Premium API Access' under '/api/v1/stripe/subscriptions/72' is generic and does not clarify what the endpoint does","This endpoint path references 'stripe/subscriptions' which may indicate subscription management, but no details are available to confirm"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/72","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/72","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but there is no documentation, no OpenAPI schema, no request/response examples, and the label 'Premium API Access' gives no indication of actual functionality. The docs pages are empty. This is effectively a stub 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'0.02':107 '000':111 '20':110 '402':209 '402 payment API' '6':117 'Base network API' 'USDC API access' 'accept':121 'access':6,20,36,85,102,156,194 'account':145 'actual':195 'advertis':150 'ai':66 'analyt':65 'api':5,19,35,62,101,142,164,193 'base':8,22,92,112 'base-network' 'beyond':223 'call':12,26 'challeng':210 'connect':172 'contain':136 'content':178 'cost':104 'crypto-paid API' 'data':64 'decim':118 'descript':189 'doc':162 'document':157,213 'endpoint':30,47,75,96,120,203 'exampl':186 'expect':201 'extrem':159 'financ':69 'function':218 'gate':3,17,84 'generic':225 'header':135 'host':54 'infrastructur':72 'input':199 'instant':155 'json':126 'json-response' 'key':143 'label':99,226 'learn':68 'limit':153 'live':205 'lowpaymentfee' 'lowpaymentfee.com':32,51 'machin':67 'made':129 'mani':46 'network':93 'no-api-key' 'offer':48 'one':44 'openapi':182 'page':167 'paid':9,23 'pay':59 'pay-per-call API' 'pay-per-request':58 'payment':40,87,127,134,139 'per':11,25,60,108 'per-cal':10,24 'per-request-pricing' 'platform':52,78,149 'post':122 'post-method' 'premium':4,18,34,100,192 'price':163 'prompt':174 'proof':140 'proper':208 'protocol':41,82 'provid':33,222 'rate':152 'readm':166 'render':169 'request':61,109,123 'request/response':185 'requir':147 'return':125,196,206 'rout':221 'schema':183 'settl':86 'span':63 'spars':160 'specif':95,220 'substant':177 'unclear':216 'unit':113 'usdc':14,28,89,115 'usdc-settlement' 'use':79 'util':73 'varieti':56 'via':37,130 'wallet':173 'web3':70 'without':212 'x':133 'x-payment':132 'x402':2,16,39,81,138 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"37d45b37-e884-4f33-acd0-ca54fd3c1352","listingId":"d0b9aa85-3eb2-487b-b34a-4ac58c743dce","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/72","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:50.606Z"}],"sources":[{"listingId":"d0b9aa85-3eb2-487b-b34a-4ac58c743dce","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/72","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:50.606Z","lastSeenAt":"2026-04-22T11:32:12.872Z"}],"details":{"listingId":"d0b9aa85-3eb2-487b-b34a-4ac58c743dce","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/72 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/72"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/72"},{"claim":"Docs, pricing, API, and README pages render only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing premium API functionality without traditional API key registration","Agent-driven programmatic access to gated endpoints using on-chain USDC payments","Integrating pay-per-request services into Web3 workflows"],"bestFor":["Developers wanting keyless, pay-per-call API access","AI agents with x402-compatible payment capabilities","Users who prefer crypto-native (USDC on Base) micropayments over subscriptions"],"notFor":["Users needing detailed API documentation or schemas before integrating","Applications requiring high-throughput with predictable flat-rate pricing","Developers without USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:48.534Z"},"updatedAt":"2026-04-22T11:32:12.872Z"}}