{"id":"06a09d02-7494-400a-bc93-20a64b62e843","shortId":"5VQZdW","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 paywall. The specific resource at `/api/v1/stripe/subscriptions/52` is one of many endpoints offered by the lowpaymentfee.com platform, which advertises a broad catalog spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all gated via the x402 protocol on the Base network.\n\nThe x402 challenge for this particular endpoint indicates a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). Payment is made via the x402 \"exact\" scheme to the specified payTo address. The endpoint accepts POST requests and returns application/json. The platform advertises no API keys, no rate limits, and instant access — you simply attach the X-PAYMENT header with a valid x402 payment proof.\n\nHowever, the actual functionality behind this specific endpoint path (`/stripe/subscriptions/52`) is unclear. The name \"Premium API Access\" and the path suggest it may relate to Stripe subscription management, but no documentation, request schema, or response schema is available. The docs, pricing, API, and README pages all returned only a \"Connect wallet\" prompt with no substantive content. Without further documentation, the exact input parameters and response format remain unknown.","tags":[],"capabilities":["x402-payment","usdc-base","per-request-billing","json-response","post-method"],"categories":["api-gateway","payments"],"synonyms":["x402 API","pay-per-request 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 returned only 'Connect wallet' with no content","No request or response schema provided; input parameters and output format are unknown","The endpoint path '/api/v1/stripe/subscriptions/52' suggests Stripe subscription functionality but this is unconfirmed","The platform lists many endpoints but none have documented schemas or examples"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/52","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/52","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02/request in USDC on Base), but there is no documentation, no request/response schema, and no examples. The docs pages are empty. The specific functionality of this endpoint path is 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'/stripe/subscriptions/52':169 '0.02':106 '000':95 '0x8335':100 '20':94 '2913':101 '402 payment endpoint' '6':111 'Base network API' 'USDC API access' 'accept':128 'access':6,20,36,145,176 'actual':162 'address':125 'advertis':57,136 'ai':64 'analyt':63 'api':5,19,35,138,175,201 'application/json':133 'attach':148 'avail':197 'base':8,22,80,96,103 'behind':37,164 'broad':59 'catalog':60 'challeng':84 'connect':209 'content':215 'cost':92 'crypto-paid API' 'data':62 'decim':112 'doc':199 'document':190,218 'endpoint':30,50,88,127,167 'equal':105 'exact':119,220 'financ':67 'format':225 'function':163 'gate':3,17,73 'header':153 'howev':160 'indic':89 'infrastructur':70 'input':221 'instant':144 'json-response' 'key':139 'learn':66 'limit':142 'lowpaymentfee' 'lowpaymentfee.com':32,54 'machin':65 'made':115 'manag':187 'mani':49 'maximum':91 'may':182 'name':173 'network':81 'offer':51 'one':47 'page':204 'paid':9,23 'paramet':222 'particular':87 'path':168,179 'pay-per-request API' 'payment':113,152,158 'payto':124 'paywal':40 'per':11,25,107 'per-request':10,24 'per-request-billing' 'platform':55,135 'post':129 'post-method' 'premium':4,18,34,174 'price':200 'prompt':211 'proof':159 'protocol':77 'provid':33 'rate':141 'readm':203 'relat':183 'remain':226 'request':12,26,108,130,191 'resourc':43 'respons':194,224 'return':132,206 'schema':192,195 'scheme':120 'simpli':147 'span':61 'specif':42,166 'specifi':123 'stripe':185 'subscript':186 'substant':214 'suggest':180 'unclear':171 'unit':97 'unknown':227 'usdc':14,28,99,109 'usdc-base' 'use':110 'util':71 'valid':156 'via':74,116 'wallet':210 'web3':68 'without':216 'x':151 'x-payment':150 'x402':2,16,39,76,83,118,157 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"9fa5043c-4aa3-47af-a718-fdb2e520f3b7","listingId":"06a09d02-7494-400a-bc93-20a64b62e843","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/52","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:54.197Z"}],"sources":[{"listingId":"06a09d02-7494-400a-bc93-20a64b62e843","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/52","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:54.197Z","lastSeenAt":"2026-04-22T10:32:09.961Z"}],"details":{"listingId":"06a09d02-7494-400a-bc93-20a64b62e843","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/52 \\\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 x402 challenge returns maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/52"},{"claim":"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 is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/52"}],"useCases":["Programmatic access to a premium API resource without traditional API keys","Agent-driven per-call payment for API services using USDC on Base","Accessing subscription-related data or functionality via x402 micropayments"],"bestFor":["Developers or agents wanting keyless, pay-per-use API access","x402-compatible agents that can settle USDC payments on Base","Exploring x402 protocol integration patterns"],"notFor":["Users needing well-documented API contracts with clear request/response schemas","Production workloads requiring SLA guarantees or support","Users without USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:48.33Z"},"updatedAt":"2026-04-22T10:32:09.961Z"}}