{"id":"7a7c01b3-a993-43ba-a9f1-bb436d7d44f3","shortId":"CB4sAZ","kind":"x402","title":"Get the current stock price for CAT (Caterpillar) via a pay-per-call x402 endpoint on Base.","tagline":"Get the current stock price for CAT (Caterpillar) via a pay-per-call x402 endpoint on Base.","description":"This endpoint returns the current stock price for the ticker symbol CAT (Caterpillar Inc.) as a JSON response. It is part of a broader suite of paid APIs hosted at lowpaymentfee.com, which spans data analytics, AI/ML inference, finance, crypto, and utility services. All endpoints on the platform use the x402 payment protocol, settling in USDC on the Base network.\n\nThe specific endpoint at `/api/v1/stocks/CAT/price` costs $0.02 per request (20,000 base units of USDC, which has 6 decimals). Payment is handled via the x402 `exact` scheme — callers attach an `X-PAYMENT` header with a signed payment to the provider's address. No API keys, subscriptions, or rate limits are advertised; access is instant once payment is included.\n\nDocumentation on the site is extremely sparse. The landing page lists available endpoints and pricing, but the /docs, /pricing, and /README pages all render only a \"Connect wallet\" prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema, and no usage examples provided by the operator. The endpoint is confirmed live (returns a proper 402 challenge), but the actual response format for a paid request is unknown and must be inferred.","tags":[],"capabilities":["stock-price-lookup","x402-payment","usdc-settlement","base-network","pay-per-call","no-api-key","real-time-data"],"categories":["finance","data"],"synonyms":["stock price API","CAT stock price","Caterpillar stock","equity price lookup","ticker price endpoint","x402 stock data","pay-per-request stock API"],"warnings":["No OpenAPI or schema documentation available from the provider","Docs, pricing, and README pages all render only 'Connect wallet' with no content","Response format for a successful paid request is unknown — no example or schema provided","The endpoint path suggests a single-ticker endpoint; breadth of available tickers is unclear"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stocks/CAT/price","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/CAT/price","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 via a valid 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation beyond a landing page, and no examples. The actual response payload is entirely unknown, making this effectively a stub 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'/docs':172 '/pricing':173 '/readme':175 '0.02':102 '000':106 '20':105 '402':213 '6':113 'CAT stock price' 'Caterpillar stock' 'access':148 'actual':217 'addit':186 'address':138 'advertis':147 'ai/ml':72 'analyt':71 'api':64,140 'attach':124 'avail':166 'base':18,36,94,107 'base-network' 'broader':60 'call':14,32 'caller':123 'cat':7,25,48 'caterpillar':8,26,49 'challeng':214 'confirm':208 'connect':181 'cost':101 'crypto':75 'current':3,21,41 'data':70 'decim':114 'detail':188 'document':155 'endpoint':16,34,38,80,98,167,206 'equity price lookup' 'exact':121 'exampl':200 'extrem':160 'financ':74 'format':219 'get':1,19 'handl':117 'header':129 'host':65 'inc':50 'includ':154 'infer':73,229 'instant':150 'json':53 'key':141 'land':163 'limit':145 'list':165 'live':209 'lowpaymentfee.com':67 'must':227 'network':95 'no-api-key' 'openapi':192 'oper':204 'page':164,176 'paid':63,222 'part':57 'pay':12,30 'pay-per-cal':11,29 'pay-per-call' 'pay-per-request stock API' 'payment':87,115,128,133,152 'per':13,31,103 'platform':83 'price':5,23,43,169 'prompt':183 'proper':212 'protocol':88 'provid':136,201 'rate':144 'real-time-data' 'render':178 'request':104,223 'request/response':195 'respons':54,218 'return':39,210 'schema':196 'scheme':122 'servic':78 'settl':89 'sign':132 'site':158 'span':69 'spars':161 'spec':193 'specif':97 'stock':4,22,42 'stock price API' 'stock-price-lookup' 'subscript':142 'suit':61 'symbol':47 'technic':187 'ticker':46 'ticker price endpoint' 'unit':108 'unknown':225 'usag':199 'usdc':91,110 'usdc-settlement' 'use':84 'util':77 'via':9,27,118 'wallet':182 'x':127 'x-payment':126 'x402':15,33,86,120 'x402 stock data' 'x402-payment'","prices":[{"id":"31815350-c8bd-48ab-ac7d-b4d0b798d70f","listingId":"7a7c01b3-a993-43ba-a9f1-bb436d7d44f3","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/CAT/price","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:34:20.954Z"}],"sources":[{"listingId":"7a7c01b3-a993-43ba-a9f1-bb436d7d44f3","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stocks/CAT/price","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:34:20.954Z","lastSeenAt":"2026-04-23T20:01:31.285Z"}],"details":{"listingId":"7a7c01b3-a993-43ba-a9f1-bb436d7d44f3","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stocks/CAT/price \\\n  -H \"X-PAYMENT: <x402-signed-payment>\" \\\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 HTTP 402 with x402 challenge requiring USDC payment on Base network","source_url":"https://lowpaymentfee.com/api/v1/stocks/CAT/price"},{"claim":"maxAmountRequired is 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913), equaling $0.02","source_url":"https://lowpaymentfee.com/api/v1/stocks/CAT/price"},{"claim":"Platform advertises $0.02/request, no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, pricing, and README pages show only 'Connect wallet' with no additional content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Fetching the current stock price of Caterpillar (CAT) for trading bots or portfolio dashboards","Integrating real-time equity pricing into an AI agent workflow without managing API keys","On-demand stock price checks settled in USDC on Base with no subscription commitment"],"bestFor":["Agents or bots that need on-demand stock prices without API key management","Developers experimenting with x402 pay-per-call patterns for financial data","Low-volume, ad-hoc stock price lookups where $0.02/call is acceptable"],"notFor":["High-frequency trading requiring sub-millisecond latency or bulk historical data","Users who need comprehensive financial data (fundamentals, charts, options chains)","Anyone without a Base-network USDC wallet or x402-compatible client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T17:52:09.918Z"},"updatedAt":"2026-04-23T20:01:31.285Z"}}