{"id":"97893f4c-d706-4698-a03e-aad9cc0e80df","shortId":"WMF6tC","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. 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 gated via the x402 protocol on the Base network and settled in USDC.\n\nThe specific endpoint `/api/v1/stripe/subscriptions/94` 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 the endpoint is live, accepts POST requests, and pays out to a specified Ethereum address on Base. 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.\n\nHowever, the actual functionality behind this particular endpoint is unclear. The path suggests it relates to Stripe subscriptions, 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 it is impossible to confirm what data or service this endpoint returns upon successful payment.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","per-request-billing","post-method"],"categories":["payments","api-gateway"],"synonyms":["x402 API","pay-per-call API","USDC API access","lowpaymentfee","Base network API","crypto-paid API","402 payment endpoint"],"warnings":["No documentation available — all doc/API/pricing/README pages returned only 'Connect wallet' with no content.","The actual functionality of this endpoint is unknown; the path '/api/v1/stripe/subscriptions/94' is suggestive but unverified.","No request or response schema is provided; callers cannot know what to send or what to expect back.","The platform lists many endpoints but none have visible documentation beyond titles and prices."],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/94","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/94","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, but there is no documentation, no request/response schema, and no explanation of what the endpoint actually does. The crawled pages are essentially empty beyond a wallet-connect prompt. The listing is effectively a 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'0.02':104 '000':99 '20':98 '402 payment endpoint' 'Base network API' 'USDC API access' 'accept':116 'access':6,20,36,92,140 'actual':157 'address':126 'advertis':131 'ai':61 'analyt':60 'api':5,19,35,57,91,133,186 'attach':143 'avail':182 'base':8,22,77,100,128 'base-network' 'behind':37,159 'caller':141 'challeng':110 'confirm':111,209 'connect':195 'content':201 'cost':96 'crawl':184 'crypto-paid API' 'data':59,211 'doc':185 'document':175,204 'endpoint':30,46,85,113,162,215 'ethereum':125 'financ':64 'function':158 'gate':3,17,70 'header':148 'host':53 'howev':155 'imposs':207 'infrastructur':67 'instant':139 'key':134 'learn':63 'limit':137 'list':88 'live':115 'lowpaymentfee' 'lowpaymentfee.com':32,50 'machin':62 'mani':45 'maximum':95 'network':78 'offer':47 'one':43 'page':190 'paid':9,23 'particular':161 'path':166 'pay':120 'pay-per-call API' 'payment':147,153,219 'paywal':40 'per':11,25,106 'per-request':10,24 'per-request-billing' 'platform':51,130 'post':117 'post-method' 'premium':4,18,34,90 'price':187 'prompt':197 'proof':154 'protocol':74 'provid':33 'rate':136 'readm':189 'relat':169 'request':12,26,107,118,176 'respons':179 'return':192,216 'schema':177,180 'servic':213 'settl':80 'simpli':142 'span':58 'specif':84 'specifi':124 'stripe':171 'subscript':172 'substant':200 'success':218 'suggest':167 'unclear':164 'unit':101 'upon':217 'usd':105 'usdc':14,28,82,103 'usdc-settlement' 'util':68 'valid':151 'varieti':55 'via':71 'wallet':196 'web3':65 'without':202 'x':146 'x-payment':145 'x402':2,16,39,73,109,152 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"ab8e3a2c-4597-424b-967d-eafaccb4281a","listingId":"97893f4c-d706-4698-a03e-aad9cc0e80df","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/94","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:57:03.248Z"}],"sources":[{"listingId":"97893f4c-d706-4698-a03e-aad9cc0e80df","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/94","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:57:03.248Z","lastSeenAt":"2026-04-22T08:31:38.380Z"}],"details":{"listingId":"97893f4c-d706-4698-a03e-aad9cc0e80df","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/94 \\\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 valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/94"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/94"}],"useCases":["Programmatic access to a premium API resource without traditional API keys","Agent-driven workflows that need to pay per-call in USDC on Base","Testing x402 payment flows against a live endpoint"],"bestFor":["Developers experimenting with x402 payment protocol integrations","AI agents that can autonomously pay for API calls via crypto","Users who want keyless, pay-as-you-go API access"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","Applications requiring fiat-only payment rails","Anyone needing to understand the exact response payload before committing"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:47.924Z"},"updatedAt":"2026-04-22T08:31:38.380Z"}}