Real-time stock price data for APD (Air Products) via x402 micropayment on Base.
What it does
This endpoint returns the current stock price for APD (Air Products and Chemicals, Inc.) through a pay-per-request x402 protocol on the Base network. It is part of a broader suite of APIs offered by lowpaymentfee.com, which spans data analytics, AI/ML inference, finance, crypto, and utility services — all priced at $0.02 per request with no API keys, no rate limits, and no commitments required.
The endpoint accepts POST requests and settles payment in USDC on Base (contract 0x8335…2913). The x402 challenge advertises a maxAmountRequired of 20,000 base units, which at 6 decimals for USDC equals $0.02 per call. Callers must include an X-PAYMENT header containing a valid x402 payment proof. The response MIME type is application/json.
The specific endpoint path `/api/v1/stocks/APD/price` suggests a pattern where the ticker symbol is embedded in the URL, and the provider likely offers similar endpoints for other stock tickers under the `/api/v1/stocks/` path. However, only the APD endpoint was probed and confirmed live. Documentation on the site is extremely sparse — the docs, pricing, and API pages all render only a "Connect wallet" prompt with no further technical detail.
Capabilities
Use cases
- —Fetching the current stock price of APD (Air Products) in an automated trading or portfolio monitoring agent
- —Integrating real-time equity price data into a financial dashboard without managing API keys
- —Agent-driven stock price lookups settled via USDC micropayments on Base
Fit
Best for
- —AI agents needing on-demand stock price data with no subscription
- —Developers who want key-free, pay-per-use stock price access
- —Crypto-native applications that can settle in USDC on Base
Not for
- —Bulk historical stock data downloads (no evidence of batch or historical endpoints)
- —Users who cannot settle payments in USDC on the Base network
- —High-frequency trading requiring sub-millisecond latency (no latency guarantees documented)
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stocks/APD/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 schema, no documented request/response format, no example payloads, and the site's docs/pricing/API pages are all empty beyond a wallet-connect prompt. The listing is largely inferred from the URL pattern and challenge metadata.
Warnings
- —No API documentation available — docs, pricing, and API pages all show only 'Connect wallet' with no technical content
- —No request or response schema documented; the actual response format for stock price data is unknown
- —Only the APD ticker endpoint was probed; availability of other tickers is unconfirmed
- —No OpenAPI or machine-readable schema provided
Citations
- —The endpoint returns HTTP 402 with x402 challenge advertising USDC payment on Base at maxAmountRequired 20000 (=$0.02)https://lowpaymentfee.com/api/v1/stocks/APD/price
- —The site advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/stocks/APD/price