{"id":"2ff82141-67da-4e5d-af64-22a92c3e664b","shortId":"mdLXTQ","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\" behind an x402 paywall. It is part of a broader platform offering dozens of pay-per-request API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all settled on the Base network using USDC.\n\nThe specific endpoint `/api/v1/stripe/subscriptions/113` is labeled \"Premium API Access\" and costs up to $0.02 per request (maxAmountRequired of 20,000 base units of USDC, which has 6 decimals = $0.02). Payment is made via the x402 protocol's \"exact\" scheme: callers attach an X-PAYMENT header with a signed USDC payment on Base to the address `0x1A2B...85F3`. The endpoint accepts POST requests and returns `application/json`.\n\nThe platform advertises no API keys, no rate limits, and instant access. However, documentation is extremely thin — 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 name suggests it may relate to Stripe subscription management, but this is speculative. Without documentation, callers cannot know what payload to send or what response to expect.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-api","post-method"],"categories":["api-gateway","payments"],"synonyms":["x402 API","pay-per-call API","USDC API access","Base network API","lowpaymentfee","micropayment API","crypto-paid API"],"warnings":["No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet' with no content","No OpenAPI or input/output schema provided; callers cannot determine what request body to send","The endpoint path references 'stripe/subscriptions' but no explanation of its actual functionality exists","Purpose of 'Premium API Access' is entirely unclear — could be subscription management, could be something else"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/113","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/113","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 zero documentation on what the endpoint does, what inputs it accepts, or what it returns. The name 'Premium API Access' and path '/api/v1/stripe/subscriptions/113' are opaque. No OpenAPI spec, no examples, no docs pages with content — effectively a stub 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'0.02':88,103 '000':94 '0x1a2b':131 '20':93 '6':101 '85f3':132 'Base network API' 'USDC API access' 'accept':135 'access':6,20,36,83,152,191 'actual':192 'address':130 'advertis':143 'ai/ml':60 'analyt':59 'api':5,19,35,55,82,145,161,190 'application/json':140 'attach':115 'base':8,22,71,95,127 'base-network' 'behind':37 'broader':46 'call':12,26 'caller':114,216 'cannot':217 'connect':169 'content':175 'cost':85 'crypto-paid API' 'data':58,63 'decim':102 'descript':186 'doc':159 'document':154,215 'dozen':49 'endpoint':30,56,77,134,200 'exact':112 'exampl':183 'expect':198,227 'extrem':156 'finance/web3':62 'gate':3,17 'header':120 'howev':153 'infer':61 'infrastructur':65 'input':196 'instant':151 'json-api' 'key':146 'know':218 'label':80 'limit':149 'lowpaymentfee' 'lowpaymentfee.com':32 'made':106 'manag':209 'maxamountrequir':91 'may':204 'micropayment API' 'name':201 'network':72 'offer':48 'openapi':179 'page':164 'paid':9,23 'part':43 'pay':52 'pay-per-call API' 'pay-per-request':51 'payload':220 'payment':104,119,125 'paywal':40 'per':11,25,53,89 'per-cal':10,24 'platform':47,142 'post':136 'post-method' 'premium':4,18,34,81,189 'price':160 'prompt':171 'protocol':110 'provid':33 'rate':148 'readm':163 'relat':205 'render':166 'request':54,90,137 'request/response':182 'respons':225 'return':139,193 'schema':180 'scheme':113 'send':222 'settl':68 'sign':123 'span':57 'specif':76 'specul':213 'stripe':207 'subscript':208 'substant':174 'suggest':202 'thin':157 'unit':96 'usdc':14,28,74,98,124 'usdc-settlement' 'use':73 'util':66 'via':107 'wallet':170 'without':214 'x':118 'x-payment':117 'x402':2,16,39,109 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"a1d33bdd-4021-410e-a6f6-f145b086cce4","listingId":"2ff82141-67da-4e5d-af64-22a92c3e664b","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/113","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:18.616Z"}],"sources":[{"listingId":"2ff82141-67da-4e5d-af64-22a92c3e664b","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/113","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:18.616Z","lastSeenAt":"2026-04-22T18:04:20.649Z"}],"details":{"listingId":"2ff82141-67da-4e5d-af64-22a92c3e664b","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/113 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <signed-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 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/113"},{"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 network","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/113"},{"claim":"Docs, pricing, API, and README pages render only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Programmatic access to a premium API endpoint without traditional API keys","Agent-driven pay-per-request workflows settled in USDC on Base","Accessing subscription-related functionality via x402 payment protocol"],"bestFor":["Developers or agents wanting keyless, pay-per-call API access on Base","x402-compatible agents that can sign USDC payments automatically","Users who prefer crypto micropayments over traditional billing"],"notFor":["Anyone needing detailed API documentation or request/response schemas before integrating","Users without a Base-network USDC wallet","Production systems requiring SLA guarantees or support"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:50.071Z"},"updatedAt":"2026-04-22T18:04:20.649Z"}}