{"id":"438ca736-1b81-46ed-98fd-0ae667377b84","shortId":"LmHcwC","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 on the Base network, accepting USDC payments with no API keys, no rate limits, and instant access.\n\nThe specific endpoint `/api/v1/stripe/subscriptions/25` is labeled \"Premium API Access\" and requires a maximum payment of 20,000 base units of USDC (0.02 USD) per request. The x402 challenge confirms it is live, accepts POST requests, and settles payments to a specified Ethereum address on Base. The endpoint's path suggests it may relate to Stripe subscription management, but no documentation or schema details are available to confirm what data it returns or what input parameters it expects.\n\nThe platform's documentation, pricing, and API pages all appear to be behind a wallet-connect gate, so no further technical details (request/response schemas, parameter descriptions, error codes) could be gathered from the crawl. The listing is functional but lacks the depth needed for confident integration.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","post-endpoint"],"categories":["api-gateway","payments"],"synonyms":["x402 API","pay-per-call API","USDC API access","Base network API","lowpaymentfee","crypto-paid API","micropayment API"],"warnings":["No API documentation available — all doc pages require wallet connection and returned no content.","The endpoint path '/api/v1/stripe/subscriptions/25' suggests Stripe subscription functionality, but no schema or description confirms what it actually does.","No request or response schema is available; integration requires trial-and-error or out-of-band documentation.","The 'Premium API Access' label is generic and does not describe the endpoint's actual capability."],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/25","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/25","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live via a valid x402 402 challenge, and pricing is clear ($0.02 USDC per call). However, there is no OpenAPI schema, no request/response examples, and all documentation pages are gated behind wallet-connect with no useful content. The actual functionality of this specific endpoint is unclear beyond its 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'0.02':121 '000':116 '20':115 'Base network API' 'USDC API access' 'accept':87,132 'access':6,20,36,99,108 'address':142 'ai':66 'analyt':65 'api':5,19,35,62,92,107,183 'appear':186 'avail':164 'base':8,22,85,117,144 'base-network' 'behind':189 'call':12,26 'challeng':127 'code':205 'confid':222 'confirm':128,166 'connect':193 'could':206 'crawl':211 'crypto-paid API' 'data':64,168 'depth':219 'descript':203 'detail':162,199 'document':159,180 'endpoint':30,47,75,102,146 'error':204 'ethereum':141 'expect':176 'financ':69 'function':215 'gate':3,17,194 'gather':208 'host':54 'infrastructur':72 'input':173 'instant':98 'integr':223 'key':93 'label':105 'lack':217 'learn':68 'limit':96 'list':213 'live':131 'lowpaymentfee' 'lowpaymentfee.com':32,51 'machin':67 'manag':156 'mani':46 'maximum':112 'may':151 'micropayment API' 'need':220 'network':86 'no-api-key' 'offer':48 'one':44 'page':184 'paid':9,23 'paramet':174,202 'path':148 'pay':59 'pay-per-call API' 'pay-per-request':58 'payment':40,89,113,137 'per':11,25,60,123 'per-cal':10,24 'platform':52,78,178 'post':133 'post-endpoint' 'premium':4,18,34,106 'price':181 'protocol':41,82 'provid':33 'rate':95 'relat':152 'request':61,124,134 'request/response':200 'requir':110 'return':170 'schema':161,201 'settl':136 'span':63 'specif':101 'specifi':140 'stripe':154 'subscript':155 'suggest':149 'technic':198 'unit':118 'usd':122 'usdc':14,28,88,120 'usdc-settlement' 'use':79 'util':73 'varieti':56 'via':37 'wallet':192 'wallet-connect':191 'web3':70 'x402':2,16,39,81,126 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"d5dd17f2-4d65-4087-a530-1bc975d1782f","listingId":"438ca736-1b81-46ed-98fd-0ae667377b84","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/25","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:38.522Z"}],"sources":[{"listingId":"438ca736-1b81-46ed-98fd-0ae667377b84","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/25","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:38.522Z","lastSeenAt":"2026-04-22T13:31:38.283Z"}],"details":{"listingId":"438ca736-1b81-46ed-98fd-0ae667377b84","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/25\n# Returns 402 with x402 challenge; attach X-PAYMENT header with valid USDC payment on Base to access.","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/25"},{"claim":"The platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/25"}],"useCases":["Accessing premium API functionality without traditional API key registration","Making one-off paid API calls settled in USDC on Base","Integrating agent-driven workflows that pay per request via x402"],"bestFor":["Developers who want keyless, pay-per-use API access","AI agents with x402-compatible wallets on Base","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users who need detailed API documentation before integrating","Applications requiring high-throughput with predictable flat-rate pricing","Developers without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:49.066Z"},"updatedAt":"2026-04-22T13:31:38.283Z"}}