{"id":"83a86276-3c27-4aac-8e6b-a3d56e719f13","shortId":"meq3zf","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\" behind an x402 payment wall. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a broad catalog of pay-per-call APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints use the x402 protocol on the Base network, settling payments in USDC.\n\nThe specific endpoint `/api/v1/stripe/subscriptions/42` is labeled \"Premium API Access\" in the x402 challenge. The maximum amount required per call is 20,000 base units of USDC (6 decimals), which equals $0.02 USD. The endpoint accepts POST requests and returns `application/json`. Payment is sent to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base, with a 300-second payment timeout.\n\nDocumentation is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further 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 name suggests it may relate to Stripe subscription management, but this is speculative. The platform advertises no API keys, no rate limits, and instant access as features.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","per-request-billing","json-response","post-method"],"categories":["api-gateway","payments"],"synonyms":["premium API","x402 API","pay-per-call API","USDC API access","Base network API","lowpaymentfee","stripe subscriptions API","micropayment API"],"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; input parameters and response format are unknown","The endpoint path '/api/v1/stripe/subscriptions/42' suggests Stripe subscription functionality but this is unconfirmed","The actual functionality behind 'Premium API Access' is not described anywhere in the crawled material"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/42","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/42","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 documentation, no OpenAPI schema, no request/response examples, and no explanation of what the endpoint actually does beyond the label \"Premium API Access\". The docs pages are empty. This is effectively a stub 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'0.02':119 '000':110 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':134 '20':109 '300':139 '6':115 'Base network API' 'USDC API access' 'accept':123 'access':6,20,36,97,180,215 'actual':181 'address':133 'advertis':206 'ai':67 'amount':104 'analyt':66 'api':5,19,35,63,96,149,179,208 'application/json':128 'base':8,22,83,111,136 'base-network' 'behind':37 'broad':56 'call':62,107 'catalog':57 'challeng':101 'connect':158 'content':164 'data':65 'decim':116 'descript':175 'doc':148 'document':143 'endpoint':30,47,76,91,122,190 'equal':118 'exampl':172 'expect':188 'extrem':145 'featur':217 'financ':70 'gate':3,17 'host':54 'infrastructur':73 'input':185 'instant':214 'json-response' 'key':209 'label':94 'learn':69 'limit':212 'lowpaymentfee' 'lowpaymentfee.com':32,51 'machin':68 'manag':199 'mani':46 'maximum':103 'may':194 'micropayment API' 'name':191 'network':84 'offer':48 'one':44 'openapi':168 'page':153 'paid':9,23 'paramet':186 'pay':60 'pay-per-cal':59 'pay-per-call API' 'payment':40,86,129,141 'per':11,25,61,106 'per-request':10,24 'per-request-billing' 'platform':52,205 'post':124 'post-method' 'premium':4,18,34,95,178 'premium API' 'price':150 'prompt':160 'protocol':80 'provid':33 'rate':211 'readm':152 'relat':195 'render':155 'request':12,26,125 'request/response':171 'requir':105 'return':127,182 'schema':169 'second':140 'sent':131 'settl':85 'span':64 'spars':146 'specif':90 'specul':203 'stripe':197 'stripe subscriptions API' 'subscript':198 'suggest':192 'timeout':142 'unit':112 'usd':120 'usdc':14,28,88,114 'usdc-settlement' 'use':77 'util':74 'wall':41 'wallet':159 'web3':71 'x402':2,16,39,79,100 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"0e73a18b-cb89-4c6f-a2d2-8560bccf1049","listingId":"83a86276-3c27-4aac-8e6b-a3d56e719f13","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/42","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:49.442Z"}],"sources":[{"listingId":"83a86276-3c27-4aac-8e6b-a3d56e719f13","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/42","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:49.442Z","lastSeenAt":"2026-04-22T12:04:25.525Z"}],"details":{"listingId":"83a86276-3c27-4aac-8e6b-a3d56e719f13","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/42 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","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 network","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/42"},{"claim":"The platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Payment is made to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 (USD Coin)","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/42"},{"claim":"Docs, API, pricing, and README pages render only a 'Connect wallet' prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing a premium API endpoint with per-call USDC micropayments on Base","Programmatic subscription management or premium data retrieval behind a paywall","Agent-driven API consumption without API keys or rate limits"],"bestFor":["Developers wanting keyless, pay-per-use API access","AI agents that can settle x402 payments in USDC on Base","Users who prefer crypto micropayments over traditional API subscriptions"],"notFor":["Users needing detailed API documentation or schemas before integrating","Applications requiring fiat-only payment methods","High-volume use cases where per-call pricing may not be cost-effective compared to bulk plans"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:48.599Z"},"updatedAt":"2026-04-22T12:04:25.525Z"}}