Get the current stock price for CAT (Caterpillar) via a pay-per-call x402 endpoint on Base.
What it does
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.
The 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.
Documentation 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.
Capabilities
Use cases
- —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
Fit
Best for
- —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
Not for
- —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
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stocks/CAT/price \
-H "X-PAYMENT: <x402-signed-payment>" \
-H "Content-Type: application/json"Endpoint
Quality
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 listing.
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
Citations
- —Endpoint returns HTTP 402 with x402 challenge requiring USDC payment on Base networkhttps://lowpaymentfee.com/api/v1/stocks/CAT/price
- —maxAmountRequired is 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913), equaling $0.02https://lowpaymentfee.com/api/v1/stocks/CAT/price
- —Platform advertises $0.02/request, no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —Docs, pricing, and README pages show only 'Connect wallet' with no additional contenthttps://lowpaymentfee.com/docs