{"id":"5c1e1877-d0aa-4c99-b9e3-c4ca04ea75f1","shortId":"uJZpVR","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 that offers dozens of pay-per-request API endpoints spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all settled on the Base network using USDC.\n\nThe specific endpoint `/api/v1/stripe/subscriptions/122` is labeled \"Premium API Access\" in the x402 challenge. The maximum amount required per call is 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 USD (USDC uses 6 decimals). The payment scheme is \"exact\" and the timeout is 300 seconds. No API keys or rate limits are advertised; access is granted purely via the x402 payment header.\n\nDocumentation on the site 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 spec, no request/response schema beyond the x402 challenge's outputSchema stub, and no description of what this particular endpoint actually returns. The endpoint name suggests it may relate to Stripe subscription management, but this is speculative. The platform's landing page confirms the $0.02/request pricing model and lists the Base network as the settlement layer.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","per-request-pricing","no-api-key","http-post"],"categories":["api-gateway","payments"],"synonyms":["x402 API","pay-per-call API","USDC API access","Base network API","lowpaymentfee","crypto-paid API","402 payment endpoint"],"warnings":["No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet'","No OpenAPI or request/response schema provided; actual endpoint behavior is unknown","Endpoint path suggests Stripe subscription management but no confirmation exists","The purpose of 'Premium API Access' vs. the other $0.02 endpoints on the platform is not explained"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/122","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/122","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 with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and the actual functionality of this specific endpoint is unclear. The listing is effectively a 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'/request':216 '0.02':109,215 '000':98 '0x8335':103 '20':97 '2913':104 '300':124 '402 payment endpoint' '6':113 'Base network API' 'USDC API access' 'access':6,20,36,85,134 'actual':191 'advertis':133 'ai':61 'amount':92 'analyt':60 'api':5,19,35,56,84,127,153 'base':8,22,73,99,106,222 'base-network' 'behind':37 'beyond':176 'broader':46 'call':12,26,95 'challeng':89,179 'confirm':213 'connect':161 'content':167 'crypto-paid API' 'data':59 'decim':114 'descript':185 'doc':151 'document':143 'dozen':50 'endpoint':30,57,79,190,194 'equal':108 'exact':119 'extrem':148 'financ':64 'gate':3,17 'grant':136 'header':142 'http-post' 'infrastructur':67 'key':128 'label':82 'land':211 'layer':227 'learn':63 'limit':131 'list':220 'lowpaymentfee' 'lowpaymentfee.com':32 'machin':62 'manag':203 'maximum':91 'may':198 'model':218 'name':195 'network':74,223 'no-api-key' 'offer':49 'openapi':171 'outputschema':181 'page':156,212 'paid':9,23 'part':43 'particular':189 'pay':53 'pay-per-call API' 'pay-per-request':52 'payment':116,141 'paywal':40 'per':11,25,54,94 'per-cal':10,24 'per-request-pricing' 'platform':47,209 'premium':4,18,34,83 'price':152,217 'prompt':163 'provid':33 'pure':137 'rate':130 'readm':155 'relat':199 'render':158 'request':55 'request/response':174 'requir':93 'return':192 'schema':175 'scheme':117 'second':125 'settl':70 'settlement':226 'site':146 'span':58 'spec':172 'specif':78 'specul':207 'stripe':201 'stub':182 'subscript':202 'substant':166 'suggest':196 'thin':149 'timeout':122 'unit':100 'usd':110 'usdc':14,28,76,102,111 'usdc-settlement' 'use':75,112 'util':68 'via':138 'wallet':162 'web3':65 'x402':2,16,39,88,140,178 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"029e2efb-fa2c-4184-8cec-19a915c087d1","listingId":"5c1e1877-d0aa-4c99-b9e3-c4ca04ea75f1","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/122","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:30.080Z"}],"sources":[{"listingId":"5c1e1877-d0aa-4c99-b9e3-c4ca04ea75f1","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/122","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:30.080Z","lastSeenAt":"2026-04-22T16:31:56.144Z"}],"details":{"listingId":"5c1e1877-d0aa-4c99-b9e3-c4ca04ea75f1","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/122 \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\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 x402 challenge requires a maximum of 20,000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, equaling $0.02","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/122"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on the Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, pricing, API, and README pages render only a 'Connect wallet' prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Programmatic access to premium API functionality paid per-call with USDC on Base","Agent-driven workflows that need keyless, pay-as-you-go API access","Integrating x402-compatible payment flows into automated pipelines"],"bestFor":["Developers or agents already holding USDC on Base who want frictionless per-call API access","x402-native agent toolchains that auto-negotiate payment challenges","Low-volume or bursty usage patterns where subscription pricing is wasteful"],"notFor":["Users who need detailed API documentation or response schemas before integrating","High-volume consumers who would benefit from bulk/subscription pricing rather than per-call charges","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:49.516Z"},"updatedAt":"2026-04-22T16:31:56.144Z"}}