Get the current stock price for BRK.B via a pay-per-call x402 endpoint on Base.
What it does
This endpoint returns the current stock price for Berkshire Hathaway Class B (BRK.B) as JSON, accessed via the x402 payment protocol on the Base network. Each request costs $0.02 in USDC (20,000 base units of USDC with 6 decimals). No API keys or accounts are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof and receive the data immediately.
The endpoint is part of a broader suite of APIs hosted at lowpaymentfee.com, which spans data analytics, AI/ML inference, finance/crypto market data, and utility services, all priced uniformly at $0.02 per request. The stock price endpoint specifically lives under the finance category. The x402 challenge confirms the endpoint is live, accepts POST requests, settles payments to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, and has a payment timeout of 300 seconds.
Documentation beyond the landing page is sparse — the /docs, /pricing, and /README pages all render only a "Connect wallet" prompt with no additional technical detail. There is no OpenAPI spec, no example request/response payloads, and no description of the response schema. The endpoint is confirmed live via the 402 challenge, but the actual response format must be inferred.
Capabilities
Use cases
- —Fetching the latest BRK.B stock price in an automated trading or portfolio monitoring agent
- —Integrating real-time equity prices into a dashboard without managing API keys
- —Paying per-call for stock data from an AI agent with a crypto wallet on Base
Fit
Best for
- —Agents or bots that need on-demand stock prices without subscription commitments
- —Developers who want key-less, pay-as-you-go access to equity data
- —x402-native applications settling microtransactions in USDC on Base
Not for
- —High-frequency trading requiring sub-millisecond latency and bulk data
- —Users who need historical OHLCV or full market depth data (not offered here)
- —Anyone without a Base-compatible wallet or USDC balance
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stocks/BRK.B/price \
-H "X-PAYMENT: <x402_payment_proof>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is confirmed live via a valid 402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no documented request/response schema, no example payloads, and the docs pages are empty beyond a wallet-connect prompt. The listing is functional but information-sparse.
Warnings
- —No OpenAPI or schema documentation available — response format is unknown
- —All documentation pages (/docs, /pricing, /README) render only a 'Connect wallet' prompt with no technical content
- —No example request or response payloads are available to verify actual output
- —The specific stock price endpoint is not listed on the landing page (only /api/v1/finance/prices is); BRK.B path may be undocumented
Citations
- —Endpoint returns HTTP 402 with x402 challenge, confirming it is livehttps://lowpaymentfee.com/api/v1/stocks/BRK.B/price
- —Price is 20,000 base units of USDC (USD Coin, 6 decimals) = $0.02 per request on Base networkhttps://lowpaymentfee.com/api/v1/stocks/BRK.B/price
- —Site advertises $0.02/request pricing with no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —Payment settles to 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using USDC contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/stocks/BRK.B/price