{"id":"8d393ecf-ffbf-4ca1-bb49-e67ce0027143","shortId":"fAU5ER","kind":"x402","title":"Premium API access via x402 payment on Base network, settled in USDC.","tagline":"Premium API access via x402 payment on Base network, settled in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" gated behind an x402 payment challenge. The endpoint is live and responds with a 402 challenge requiring payment of 20,000 base units of USDC (0x8335...0913) on the Base network, which equates to $0.02 per request (USDC uses 6 decimals, so 20000 / 10^6 = $0.02). Payment is made via the x402 \"exact\" scheme to the specified wallet address.\n\nThe broader lowpaymentfee.com platform advertises multiple API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities — all priced at $0.02 per request with no API keys, no rate limits, and instant access. However, this specific endpoint (/api/v1/stripe/subscriptions/61) is labeled \"Premium API Access\" and its exact functionality beyond the generic label is unclear from available documentation. The docs, pricing, and API pages all require a wallet connection and provide no additional detail.\n\nThe endpoint accepts POST requests, is discoverable, and uses x402 version 1 with a maximum timeout of 300 seconds. The asset used for payment is USD Coin (version 2) on the Base L2 network.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","post-method","no-api-key","per-request-billing"],"categories":["api-gateway","payments"],"synonyms":["x402 api","pay-per-request api","usdc api access","base network api","lowpaymentfee","crypto api payment","micropayment api"],"warnings":["No documentation available — all doc pages require wallet connection and show no content","The specific functionality of this 'Premium API Access' endpoint is entirely unclear","No request or response schema provided beyond the x402 challenge metadata","The endpoint path suggests Stripe subscription management but this is unconfirmed"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/61","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/61","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 on what the endpoint actually does, no request/response schema, and no examples. The \"Premium API Access\" label is generic and uninformative. The docs pages all just show 'Connect wallet' with no 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'0.02':67,78,114 '000':53 '0913':59 '0x8335':58 '1':177 '10':76 '2':194 '20':52 '20000':75 '300':183 '402':47 '6':72,77 'accept':168 'access':3,15,32,126,136 'addit':164 'address':91 'advertis':96 'ai':103 'analyt':102 'api':2,14,31,98,119,135,154 'asset':186 'avail':148 'base':8,20,54,62,197 'base network api' 'base-network' 'behind':34 'beyond':141 'broader':93 'categori':99 'challeng':38,48 'coin':192 'connect':160 'crypto api payment' 'data':101 'decim':73 'detail':165 'discover':172 'doc':151 'document':149 'endpoint':26,40,130,167 'equat':65 'exact':85,139 'financ':106 'function':140 'gate':33 'generic':143 'howev':127 'includ':100 'infrastructur':109 'instant':125 'key':120 'l2':198 'label':133,144 'learn':105 'limit':123 'live':42 'lowpaymentfee' 'lowpaymentfee.com':28,94 'machin':104 'made':81 'maximum':180 'micropayment api' 'multipl':97 'network':9,21,63,199 'no-api-key' 'page':155 'pay-per-request api' 'payment':6,18,37,50,79,189 'per':68,115 'per-request-billing' 'platform':95 'post':169 'post-method' 'premium':1,13,30,134 'price':112,152 'provid':29,162 'rate':122 'request':69,116,170 'requir':49,157 'respond':44 'scheme':86 'second':184 'settl':10,22 'specif':129 'specifi':89 'timeout':181 'unclear':146 'unit':55 'usd':191 'usdc':12,24,57,70 'usdc api access' 'usdc-settlement' 'use':71,174,187 'util':110 'version':176,193 'via':4,16,82 'wallet':90,159 'web3':107 'x402':5,17,36,84,175 'x402 api' 'x402-payment'","prices":[{"id":"1c4ef40b-5577-4a88-9be0-eb31586bd48d","listingId":"8d393ecf-ffbf-4ca1-bb49-e67ce0027143","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/61","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:56.631Z"}],"sources":[{"listingId":"8d393ecf-ffbf-4ca1-bb49-e67ce0027143","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/61","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:56.631Z","lastSeenAt":"2026-04-22T09:01:35.351Z"}],"details":{"listingId":"8d393ecf-ffbf-4ca1-bb49-e67ce0027143","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/61 \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/61"},{"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":"The USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/61"}],"useCases":["Accessing premium API services without traditional API key registration","Making per-request payments for API access using USDC on Base","Agent-driven API consumption with automatic crypto payment settlement"],"bestFor":["Developers who want keyless, pay-per-use API access","AI agents that can settle x402 payments autonomously","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users who need detailed API documentation before purchasing","Those without USDC on the Base network","High-volume consumers who prefer flat-rate pricing"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:48.255Z"},"updatedAt":"2026-04-22T09:01:35.351Z"}}