{"id":"78f61472-75a7-4f99-8cb6-a7238082eede","shortId":"ZRqMda","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\" 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 settlement on the Base network using USDC.\n\nThe specific endpoint `/api/v1/stripe/subscriptions/109` is labeled \"Premium API Access\" and costs $0.02 per request (20,000 base units of USDC with 6 decimals). Payment is made via the x402 exact scheme: callers include an X-PAYMENT header with a signed payment to the specified wallet address, and the server fulfills the request upon verification. The response MIME type is application/json.\n\nDocumentation on the platform is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no additional content. There is no OpenAPI schema, no request/response examples, and no description of what \"Premium API Access\" actually returns or what input parameters it expects. The endpoint is live (returning a proper 402 challenge), but without further documentation it is unclear what data or functionality this specific subscription endpoint provides.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","per-request-billing","json-response","no-api-key"],"categories":["api-gateway","payments"],"synonyms":["x402 API","pay-per-request API","USDC API access","Base network API","lowpaymentfee","crypto-paid API","402 payment protocol"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content.","No OpenAPI or request/response schema provided; it is unknown what this endpoint actually returns.","The label 'Premium API Access' and path '/api/v1/stripe/subscriptions/109' are ambiguous — unclear what data or service is delivered.","The endpoint path references 'stripe/subscriptions' which may indicate subscription management rather than a data API, but no details are available."],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/109","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/109","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 402 challenge, but there is virtually no documentation: no OpenAPI schema, no request/response examples, and no explanation of what 'Premium API Access' actually provides. The docs/pricing/README pages are all blank beyond a wallet-connect prompt. This is effectively a stub 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'0.02':107 '000':111 '20':110 '402':213 '402 payment protocol' '6':117 'Base network API' 'USDC API access' 'access':6,20,36,104,197 'actual':198 'addit':180 'address':142 'ai':63 'analyt':62 'api':5,19,35,58,83,103,166,196 'application/json':156 'base':8,22,92,112 'base-network' 'caller':127 'categori':59 'challeng':214 'connect':175 'content':181 'cost':106 'crypto-paid API' 'data':61,223 'decim':118 'descript':192 'doc':165 'document':157,218 'endpoint':30,47,72,98,207,229 'exact':125 'exampl':189 'expect':205 'extrem':162 'financ':66 'fulfil':146 'function':225 'gate':3,17 'header':133 'host':54 'includ':60,128 'infrastructur':69 'input':202 'json-response' 'key':84 'label':101 'learn':65 'limit':87 'live':209 'lowpaymentfee' 'lowpaymentfee.com':32,51 'machin':64 'made':121 'mani':46 'mime':153 'network':93 'no-api-key' 'offer':48 'one':44 'openapi':185 'page':170 'paid':9,23 'paramet':203 'pay':78 'pay-per-request':77 'pay-per-request API' 'payment':40,119,132,137 'per':11,25,79,108 'per-request':10,24 'per-request-billing' 'platform':52,75,160 'premium':4,18,34,102,195 'price':167 'prompt':177 'proper':212 'protocol':41 'provid':33,230 'rate':86 'readm':169 'render':172 'request':12,26,80,109,148 'request/response':188 'respons':152 'return':199,210 'schema':186 'scheme':126 'server':145 'settlement':89 'sign':136 'spars':163 'specif':97,227 'specifi':140 'subscript':228 'type':154 'unclear':221 'unit':113 'upon':149 'usdc':14,28,95,115 'usdc-settlement' 'use':94 'util':70 'varieti':56 'verif':150 'via':37,122 'wallet':141,176 'web3':67 'without':216 'x':131 'x-payment':130 'x402':2,16,39,124 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"65ec241b-f432-4d3c-8073-ba41dfbdc631","listingId":"78f61472-75a7-4f99-8cb6-a7238082eede","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/109","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:21.698Z"}],"sources":[{"listingId":"78f61472-75a7-4f99-8cb6-a7238082eede","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/109","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:21.698Z","lastSeenAt":"2026-04-22T18:32:18.003Z"}],"details":{"listingId":"78f61472-75a7-4f99-8cb6-a7238082eede","quickStartSnippet":"# The endpoint requires an x402 X-PAYMENT header with a signed USDC payment on Base.\n# Using curl as a conceptual example (actual payment header must be constructed per x402 spec):\ncurl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/109 \\\n  -H \"X-PAYMENT: <signed-x402-payment>\" \\\n  -H \"Content-Type: application/json\"","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 network","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/109"},{"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":"Docs, API, pricing, and README pages render only a 'Connect wallet' prompt with no additional content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Programmatic access to premium API functionality paid per-call in USDC","Agent-driven workflows that need keyless, pay-as-you-go API access","Integrating x402-compatible endpoints into crypto-native applications"],"bestFor":["Developers building on Base who want frictionless per-request billing","AI agents with USDC wallets needing on-demand API access","Projects that want to avoid API key management and subscription commitments"],"notFor":["Users who need detailed documentation or OpenAPI specs before integrating","High-volume use cases where per-request crypto payments add unacceptable latency","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:49.971Z"},"updatedAt":"2026-04-22T18:32:18.003Z"}}