{"id":"d1fcbb69-02f9-4870-929d-9565d9ec1ee2","shortId":"g8zwnE","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 endpoint is located at `/api/v1/stripe/subscriptions/38` and accepts POST requests. Payment is settled on the Base network using USDC (contract 0x8335…2913) via the x402 \"exact\" scheme.\n\nThe x402 challenge advertises a maxAmountRequired of 20,000 base units. Since USDC uses 6 decimals, this translates to $0.02 per request, consistent with the site's stated pricing of $0.02/request across all its API offerings. The provider advertises no API keys, no rate limits, and instant access.\n\nThe broader lowpaymentfee.com platform offers multiple API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities. However, this specific endpoint (`/api/v1/stripe/subscriptions/38`) is labeled \"Premium API Access\" without further documentation on what data or functionality it returns. The docs, pricing, API, and README pages all resolve to a minimal \"Connect wallet\" prompt, providing no additional technical detail. Without request/response schema documentation, the actual behavior of this endpoint remains unclear.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","per-request-billing","post-method"],"categories":["api-gateway","payments"],"synonyms":["lowpaymentfee","x402 api","pay-per-request api","USDC api access","crypto-paid api","base network api"],"warnings":["No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet'","The endpoint path '/api/v1/stripe/subscriptions/38' suggests a subscription resource but the x402 challenge uses per-request 'exact' scheme — purpose is unclear","No request body schema or response schema documented","No OpenAPI spec or AI plugin manifest found"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/38","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/38","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 the docs pages are empty. The name 'Premium API Access' and path '/api/v1/stripe/subscriptions/38' give no clear indication of 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'/request':99 '0.02':87,98 '000':76 '0x8335':61 '20':75 '2913':62 '6':82 'USDC api access' 'accept':48 'access':6,20,36,116,145 'across':100 'actual':181 'addit':173 'advertis':71,107 'ai':128 'analyt':127 'api':5,19,35,103,109,123,144,159 'base':8,22,56,77 'base network api' 'base-network' 'behavior':182 'behind':37 'broader':118 'categori':124 'challeng':70 'connect':168 'consist':90 'contract':60 'crypto-paid api' 'data':126,151 'decim':83 'detail':175 'doc':157 'document':148,179 'endpoint':30,42,139,185 'exact':66 'financ':131 'function':153 'gate':3,17 'howev':136 'includ':125 'infrastructur':134 'instant':115 'key':110 'label':142 'learn':130 'limit':113 'locat':44 'lowpaymentfee' 'lowpaymentfee.com':32,119 'machin':129 'maxamountrequir':73 'minim':167 'multipl':122 'network':57 'offer':104,121 'page':162 'paid':9,23 'pay-per-request api' 'payment':51 'paywal':40 'per':11,25,88 'per-request':10,24 'per-request-billing' 'platform':120 'post':49 'post-method' 'premium':4,18,34,143 'price':96,158 'prompt':170 'provid':33,106,171 'rate':112 'readm':161 'remain':186 'request':12,26,50,89 'request/response':177 'resolv':164 'return':155 'schema':178 'scheme':67 'settl':53 'sinc':79 'site':93 'specif':138 'state':95 'technic':174 'translat':85 'unclear':187 'unit':78 'usdc':14,28,59,80 'usdc-settlement' 'use':58,81 'util':135 'via':63 'wallet':169 'web3':132 'without':146,176 'x402':2,16,39,65,69 'x402 api' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"e33babe2-2cc0-4aaa-ac76-89ac52badf2e","listingId":"d1fcbb69-02f9-4870-929d-9565d9ec1ee2","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/38","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:54.243Z"}],"sources":[{"listingId":"d1fcbb69-02f9-4870-929d-9565d9ec1ee2","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/38","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:54.243Z","lastSeenAt":"2026-04-22T10:32:09.980Z"}],"details":{"listingId":"d1fcbb69-02f9-4870-929d-9565d9ec1ee2","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/38 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The x402 challenge advertises maxAmountRequired of 20000 base units in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/38"},{"claim":"The site advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/38"}],"useCases":["Programmatic access to a premium API endpoint with per-call USDC micropayments","Agent-driven workflows that need keyless, pay-as-you-go API access on Base","Testing x402 payment flows against a live endpoint"],"bestFor":["Developers experimenting with x402 payment protocol","Agents that can settle USDC payments on Base","Use cases requiring no-signup, no-API-key access"],"notFor":["Users who need detailed API documentation or response schemas before integrating","Applications requiring fiat-only payment rails"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:48.371Z"},"updatedAt":"2026-04-22T10:32:09.980Z"}}