{"id":"faed883b-edb5-41f4-b0f9-17bbbf19adf1","shortId":"v4MBxH","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 one of many endpoints offered by the lowpaymentfee.com platform, which hosts a variety of APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all payable per-request via the x402 protocol on the Base network using USDC.\n\nThe specific endpoint `/api/v1/stripe/subscriptions/119` is listed as \"Premium API Access\" with a maximum cost of 20,000 base units of USDC (0.02 USD per request). The x402 challenge confirms it accepts POST requests, settles on Base via the \"exact\" scheme, and pays to address `0x1A2B...85F3`. The asset is USDC at contract `0x8335...2913` on Base. The timeout for payment is 300 seconds.\n\nHowever, the actual functionality behind this endpoint is unclear. The name \"Premium API Access\" and the path segment \"stripe/subscriptions\" suggest it may relate to subscription management or Stripe integration, but no documentation, request schema, or response schema is available. The crawled docs, API, pricing, and README pages all returned only a \"Connect wallet\" prompt with no substantive content. Without further documentation, the exact input parameters and response format cannot be determined.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","per-request-billing","post-endpoint"],"categories":["api-gateway","payments"],"synonyms":["lowpaymentfee","x402 API","pay-per-call API","USDC API access","Base network API","micropayment API","stripe subscription API"],"warnings":["No documentation available — all doc/API/pricing/README pages returned only 'Connect wallet'","Actual functionality of this endpoint is unknown; the path suggests Stripe subscription management but this is unconfirmed","No request or response schema provided","No OpenAPI spec or AI plugin manifest found"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/119","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/119","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, confirming pricing and payment details. However, there is no documentation, no request/response schema, and no explanation of what the endpoint actually does. The crawled pages beyond the homepage returned only 'Connect wallet' with no useful 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'0.02':105 '000':100 '0x1a2b':128 '0x8335':136 '20':99 '2913':137 '300':145 '85f3':129 'Base network API' 'USDC API access' 'accept':114 'access':6,20,36,93,160 'actual':149 'address':127 'ai':61 'analyt':60 'api':5,19,35,57,92,159,189 'asset':131 'avail':185 'base':8,22,80,101,119,139 'base-network' 'behind':37,151 'call':12,26 'cannot':215 'challeng':111 'confirm':112 'connect':198 'content':204 'contract':135 'cost':97 'crawl':187 'data':59 'determin':217 'doc':188 'document':178,207 'endpoint':30,46,86,153 'exact':122,209 'financ':64 'format':214 'function':150 'gate':3,17 'host':53 'howev':147 'infrastructur':67 'input':210 'integr':175 'learn':63 'list':89 'lowpaymentfee' 'lowpaymentfee.com':32,50 'machin':62 'manag':172 'mani':45 'maximum':96 'may':168 'micropayment API' 'name':157 'network':81 'offer':47 'one':43 'page':193 'paid':9,23 'paramet':211 'path':163 'pay':125 'pay-per-call API' 'payabl':70 'payment':143 'paywal':40 'per':11,25,72,107 'per-cal':10,24 'per-request':71 'per-request-billing' 'platform':51 'post':115 'post-endpoint' 'premium':4,18,34,91,158 'price':190 'prompt':200 'protocol':77 'provid':33 'readm':192 'relat':169 'request':73,108,116,179 'respons':182,213 'return':195 'schema':180,183 'scheme':123 'second':146 'segment':164 'settl':117 'span':58 'specif':85 'stripe':174 'stripe subscription API' 'stripe/subscriptions':165 'subscript':171 'substant':203 'suggest':166 'timeout':141 'unclear':155 'unit':102 'usd':106 'usdc':14,28,83,104,133 'usdc-settlement' 'use':82 'util':68 'varieti':55 'via':74,120 'wallet':199 'web3':65 'without':205 'x402':2,16,39,76,110 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"75d0d33b-fd7d-47f8-a45f-f08ee3abb362","listingId":"faed883b-edb5-41f4-b0f9-17bbbf19adf1","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/119","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:15.052Z"}],"sources":[{"listingId":"faed883b-edb5-41f4-b0f9-17bbbf19adf1","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/119","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:15.052Z","lastSeenAt":"2026-04-22T19:32:03.130Z"}],"details":{"listingId":"faed883b-edb5-41f4-b0f9-17bbbf19adf1","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/119 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <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 valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/119"},{"claim":"The platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/119"}],"useCases":["Programmatic access to a premium API endpoint with per-call USDC payment on Base","Agent-driven API consumption without API keys or subscriptions","Testing x402 payment flows against a live endpoint"],"bestFor":["Developers exploring x402 payment protocol integrations","Agents that need keyless, pay-per-call API access on Base","Projects requiring USDC-settled micropayments for API usage"],"notFor":["Users who need detailed API documentation before integrating","Applications requiring guaranteed SLAs or support contracts","Anyone needing free or fiat-only payment options"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:50.197Z"},"updatedAt":"2026-04-22T19:32:03.130Z"}}