{"id":"056122f0-3d59-4c8b-85f5-d2101d923773","shortId":"CXUxVe","kind":"x402","title":"Stock market quote for ISRG via x402 micropayment on Base, $0.02 per request.","tagline":"Stock market quote for ISRG via x402 micropayment on Base, $0.02 per request.","description":"This endpoint provides a stock market quote for ISRG (Intuitive Surgical, Inc.) through the lowpaymentfee.com platform, which offers a variety of pay-per-call APIs settled via the x402 protocol on the Base network. Each request costs $0.02 in USDC (20,000 base units with 6 decimals), paid directly on-chain with no API keys, rate limits, or subscriptions required.\n\nThe endpoint is accessed via HTTP POST and returns JSON. It is part of a broader suite of finance and market data endpoints offered by the same provider, alongside AI/ML, analytics, infrastructure, and crypto APIs—all priced uniformly at $0.02 per call. The x402 challenge was confirmed live, advertising payment to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base.\n\nDocumentation beyond the landing page is sparse—the /docs, /pricing, /api, and /README pages all returned only a \"Connect wallet\" prompt with no further technical detail. No OpenAPI schema, example responses, or field-level documentation was found. The exact fields returned in the quote response are unknown and must be discovered by making a paid request.","tags":[],"capabilities":["stock-quote","market-data","x402-payment","usdc-settlement","base-network","per-call-pricing","no-api-key"],"categories":["finance","market-data"],"synonyms":["stock quote API","ISRG quote","Intuitive Surgical stock price","equity market data","x402 finance API","micropayment stock API","pay-per-call market data"],"warnings":["No documentation available—/docs, /pricing, /api, and /README all return only a wallet-connect prompt with no technical content.","Response schema is unknown; no example responses or field definitions were found.","The specific data source and freshness of the ISRG quote are undocumented.","Provider offers many diverse endpoints (AI, analytics, finance, infra) all at the same price, which may indicate a generic wrapper rather than a specialized data provider."],"endpointUrl":"https://lowpaymentfee.com/api/v1/market/quote/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/market/quote/ISRG","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI schema, no example request/response, and no documentation beyond a landing page listing. The actual response format is entirely 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'on-chain':77 'openapi':175 'page':152,161 'paid':75,203 'part':101 'pay':49 'pay-per-cal':48 'pay-per-call market data' 'payment':138 'per':12,25,50,129 'per-call-pricing' 'platform':42 'post':95 'price':125 'prompt':168 'protocol':57 'provid':29,116 'quot':3,16,33,192 'rate':84 'request':13,26,63,204 'requir':88 'respons':178,193 'return':97,163,189 'schema':176 'settl':53 'spars':154 'stock':1,14,31 'stock quote API' 'stock-quote' 'subscript':87 'suit':105 'surgic':37 'technic':172 'uniform':126 'unit':71 'unknown':195 'usdc':67,143 'usdc-settlement' 'use':142 'varieti':46 'via':6,19,54,93 'wallet':167 'x402':7,20,56,132 'x402 finance API' 'x402-payment'","prices":[{"id":"5b7c2ab6-df52-44fe-9d1c-52d9ef616b68","listingId":"056122f0-3d59-4c8b-85f5-d2101d923773","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/market/quote/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":"2026-04-18T18:33:22.880Z"}],"sources":[{"listingId":"056122f0-3d59-4c8b-85f5-d2101d923773","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/market/quote/ISRG","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:33:22.880Z","lastSeenAt":"2026-04-22T10:30:54.186Z"}],"details":{"listingId":"056122f0-3d59-4c8b-85f5-d2101d923773","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/market/quote/ISRG \\\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":"Endpoint returns HTTP 402 with x402 challenge advertising USDC payment on Base network","source_url":"https://lowpaymentfee.com/api/v1/market/quote/ISRG"},{"claim":"Price is $0.02 per request (20000 base units USDC, 6 decimals)","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/market/quote/ISRG"},{"claim":"No API keys, no rate limits, instant access advertised","source_url":"https://lowpaymentfee.com"}],"useCases":["Fetching a real-time or recent stock quote for ISRG (Intuitive Surgical) without needing an API key or subscription","Integrating on-chain micropayment-gated market data into an autonomous trading agent","Building a portfolio dashboard that pays per data request rather than committing to a monthly plan"],"bestFor":["Agents or apps that need occasional stock quotes without subscription overhead","Developers experimenting with x402 pay-per-call patterns for financial data","On-chain workflows that want USDC-settled market data on Base"],"notFor":["High-frequency trading requiring sub-millisecond latency and bulk data","Users who need comprehensive historical OHLCV data or full market depth","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T18:46:34.555Z"},"updatedAt":"2026-04-22T10:30:54.186Z"}}