{"id":"7587239e-bac2-437e-990f-bcd918e0792c","shortId":"QSfM7M","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 part of a broader platform that offers a variety of pay-per-request APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all gated behind x402 challenges on the Base network using USDC.\n\nThe specific endpoint `/api/v1/stripe/subscriptions/176` is listed as \"Premium API Access\" and returns a live 402 challenge requesting up to 0.02 USDC (20,000 base units with 6 decimals) per POST request. The platform advertises no API keys, no rate limits, and instant access — callers simply attach an X-PAYMENT header with a valid x402 payment proof to gain access. Settlement occurs on the Base L2 network to the specified payTo address.\n\nHowever, the actual functionality behind this particular endpoint is unclear. The path suggests it relates to Stripe subscriptions, but the platform's documentation pages (docs, api, pricing, README) all returned only a \"Connect wallet\" prompt with no substantive content. Without documentation or response examples, it is impossible to confirm what data or service this endpoint returns upon successful payment. The platform's landing page lists many API categories but does not specifically describe this subscription endpoint.","tags":[],"capabilities":["x402-payment-gating","usdc-settlement","base-network","per-request-billing","post-method"],"categories":["api-gateway","payments"],"synonyms":["x402 API","pay-per-call API","USDC gated endpoint","Base network API","lowpaymentfee","premium API subscription","crypto-paid API"],"warnings":["No documentation available — all doc/api/pricing/README pages return only 'Connect wallet' with no substantive content.","The endpoint path '/api/v1/stripe/subscriptions/176' suggests Stripe subscription management but this is unconfirmed.","No output schema or response examples are available; actual returned data is unknown.","The platform lists many API categories on its landing page but none specifically describe this endpoint."],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/176","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/176","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 402 challenge, but there is no documentation, no response schema, no examples, and the actual functionality behind this endpoint is entirely unclear. All doc pages return only 'Connect wallet' with no 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'0.02':100 '000':103 '20':102 '402':95 '6':107 'Base network API' 'USDC gated endpoint' 'access':6,20,36,90,123,140 'actual':155 'address':152 'advertis':114 'ai':62 'analyt':61 'api':5,19,35,58,89,116,178,219 'attach':126 'base':8,22,77,104,145 'base-network' 'behind':72,157 'broader':47 'call':12,26 'caller':124 'categori':220 'challeng':74,96 'confirm':201 'connect':185 'content':191 'crypto-paid API' 'data':60,203 'decim':108 'describ':225 'doc':177 'document':175,193 'endpoint':30,83,160,207,228 'exampl':196 'financ':65 'function':156 'gain':139 'gate':3,17,71 'header':131 'howev':153 'imposs':199 'infrastructur':68 'instant':122 'key':117 'l2':146 'land':215 'learn':64 'limit':120 'list':86,217 'live':94 'lowpaymentfee' 'lowpaymentfee.com':32 'machin':63 'mani':218 'network':78,147 'occur':142 'offer':50 'page':176,216 'paid':9,23 'part':44 'particular':159 'path':164 'pay':55 'pay-per-call API' 'pay-per-request':54 'payment':40,130,136,211 'payto':151 'per':11,25,56,109 'per-cal':10,24 'per-request-billing' 'platform':48,113,173,213 'post':110 'post-method' 'premium':4,18,34,88 'premium API subscription' 'price':179 'prompt':187 'proof':137 'protocol':41 'provid':33 'rate':119 'readm':180 'relat':167 'request':57,97,111 'respons':195 'return':92,182,208 'servic':205 'settlement':141 'simpli':125 'span':59 'specif':82,224 'specifi':150 'stripe':169 'subscript':170,227 'substant':190 'success':210 'suggest':165 'unclear':162 'unit':105 'upon':209 'usdc':14,28,80,101 'usdc-settlement' 'use':79 'util':69 'valid':134 'varieti':52 'via':37 'wallet':186 'web3':66 'without':192 'x':129 'x-payment':128 'x402':2,16,39,73,135 'x402 API' 'x402-gated':1,15 'x402-payment-gating'","prices":[{"id":"f7ef9dc8-40a0-4215-aee8-76472e19571c","listingId":"7587239e-bac2-437e-990f-bcd918e0792c","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/176","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:39.130Z"}],"sources":[{"listingId":"7587239e-bac2-437e-990f-bcd918e0792c","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/176","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:39.130Z","lastSeenAt":"2026-04-22T13:31:38.308Z"}],"details":{"listingId":"7587239e-bac2-437e-990f-bcd918e0792c","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/176 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a live x402 402 challenge requesting up to 20,000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/176"},{"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":"USDC contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base uses 6 decimals, so 20000 base units = $0.02","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic access to a premium API resource without traditional API keys","Agent-driven pay-per-request workflows settled in USDC on Base","Accessing gated services via x402 payment protocol"],"bestFor":["Developers or agents with USDC on Base looking for keyless API access","x402-compatible clients that can construct payment proofs","Exploring low-cost per-request API billing models"],"notFor":["Users who need detailed documentation or response schemas before integrating","Anyone without USDC on the Base network","Production use cases requiring guaranteed SLAs or support"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:49.143Z"},"updatedAt":"2026-04-22T13:31:38.308Z"}}