{"id":"af423587-054b-4662-8572-7a618fecf96b","shortId":"juQCXM","kind":"x402","title":"Pay-per-call stock data for ISRG (Intuitive Surgical) via x402 on Base, settled in USDC.","tagline":"Pay-per-call stock data for ISRG (Intuitive Surgical) via x402 on Base, settled in USDC.","description":"This x402 endpoint at lowpaymentfee.com provides stock data for the ticker ISRG (Intuitive Surgical) at $0.02 per request, paid in USDC on the Base network. The endpoint uses the x402 payment protocol: callers send an X-PAYMENT header with a signed USDC payment, and the server returns JSON stock data in response. No API keys, accounts, or rate limits are required — access is purely pay-per-call.\n\nThe endpoint is part of a broader platform (lowpaymentfee.com) that offers dozens of x402-gated APIs spanning data analytics, AI/ML inference, finance/crypto market data, and utility services, all priced at $0.02 per request. The specific endpoint probed here is scoped to the stock ticker ISRG, suggesting the platform likely offers similar endpoints for other tickers under the /api/v1/stocks/{ticker} pattern.\n\nDocumentation is extremely sparse — the docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no example request/response payloads, and no description of the response format beyond the MIME type application/json declared in the x402 challenge. The endpoint is confirmed live (returns a proper 402 challenge), but the actual data quality and response structure are unknown.","tags":[],"capabilities":["stock-data","per-call-payment","x402-protocol","usdc-settlement","base-network","no-api-key","no-rate-limit"],"categories":["finance","data"],"synonyms":["stock price API","ISRG stock data","equity data endpoint","pay-per-call stock API","x402 stock API","Intuitive Surgical stock","micropayment stock data"],"warnings":["No API documentation available — docs, pricing, and API pages all show only 'Connect wallet'","No OpenAPI or output schema provided; response structure is unknown","No example responses available to verify data quality or completeness","The /api/v1/stocks/{ticker} pattern is inferred; only ISRG was probed"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stocks/ISRG","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/stocks/ISRG","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live with a valid x402 402 challenge, and pricing is clear ($0.02 USDC per call). However, there is no OpenAPI schema, no example request or response, and all documentation pages render only 'Connect wallet' with no usable content. The actual response format and data fields are completely 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'0.02':50,135 '402':220 'ISRG stock data' 'Intuitive Surgical stock' 'access':97 'account':91 'actual':224 'ai/ml':124 'analyt':123 'api':89,120,173 'application/json':206 'base':14,31,58 'base-network' 'beyond':202 'broader':110 'call':4,21,103 'caller':67 'challeng':211,221 'confirm':215 'connect':179 'content':185 'data':6,23,42,85,122,128,225 'declar':207 'descript':197 'doc':170 'document':165 'dozen':115 'endpoint':37,61,105,140,156,213 'equity data endpoint' 'exampl':192 'extrem':167 'finance/crypto':126 'format':201 'gate':119 'header':73 'infer':125 'intuit':9,26,47 'isrg':8,25,46,149 'json':83 'key':90 'like':153 'limit':94 'live':216 'lowpaymentfee.com':39,112 'market':127 'micropayment stock data' 'mime':204 'network':59 'no-api-key' 'no-rate-limit' 'offer':114,154 'openapi':189 'page':174 'paid':53 'part':107 'pattern':164 'pay':2,19,101 'pay-per-cal':1,18,100 'pay-per-call stock API' 'payload':194 'payment':65,72,78 'per':3,20,51,102,136 'per-call-payment' 'platform':111,152 'price':133,171 'probe':141 'prompt':181 'proper':219 'protocol':66 'provid':40 'pure':99 'qualiti':226 'rate':93 'render':176 'request':52,137 'request/response':193 'requir':96 'respons':87,200,228 'return':82,217 'schema':190 'scope':144 'send':68 'server':81 'servic':131 'settl':15,32 'sign':76 'similar':155 'span':121 'spars':168 'specif':139 'stock':5,22,41,84,147 'stock price API' 'stock-data' 'structur':229 'suggest':150 'surgic':10,27,48 'ticker':45,148,159,163 'type':205 'unknown':231 'usdc':17,34,55,77 'usdc-settlement' 'use':62 'util':130 'via':11,28 'wallet':180 'x':71 'x-payment':70 'x402':12,29,36,64,118,210 'x402 stock API' 'x402-gated':117 'x402-protocol'","prices":[{"id":"5365c416-13b5-46b8-bec2-234bbf4660da","listingId":"af423587-054b-4662-8572-7a618fecf96b","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/stocks/ISRG","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:33:25.911Z"}],"sources":[{"listingId":"af423587-054b-4662-8572-7a618fecf96b","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stocks/ISRG","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:33:25.911Z","lastSeenAt":"2026-04-23T20:01:26.560Z"}],"details":{"listingId":"af423587-054b-4662-8572-7a618fecf96b","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stocks/ISRG \\\n  -H \"X-PAYMENT: <signed-x402-payment-header>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns a valid x402 challenge with 402 status, confirming it is live","source_url":"https://lowpaymentfee.com/api/v1/stocks/ISRG"},{"claim":"Price is $0.02 per request (maxAmountRequired 20000 base units of USDC with 6 decimals = $0.02)","source_url":"https://lowpaymentfee.com/api/v1/stocks/ISRG"},{"claim":"Payment is in USDC on the Base network to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","source_url":"https://lowpaymentfee.com/api/v1/stocks/ISRG"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Platform offers APIs across data/analytics, AI/ML, finance/web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Fetching current stock data for ISRG (Intuitive Surgical) without needing an API key or subscription","Integrating real-time equity data into an AI agent workflow with automatic USDC micropayments","Building trading bots or dashboards that pay per data request on Base L2"],"bestFor":["Agents or bots that need on-demand stock data without account setup","Developers wanting frictionless pay-per-call access to financial data","x402-compatible clients already operating on the Base network"],"notFor":["Bulk historical stock data downloads (pay-per-call at $0.02 adds up quickly)","Users who need detailed API documentation or guaranteed SLAs before integrating","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T18:46:29.824Z"},"updatedAt":"2026-04-23T20:01:26.560Z"}}