Historical stock data for APD (Air Products) via x402 micropayment on Base, $0.02/request.
What it does
This endpoint provides historical stock price data for the ticker APD (Air Products and Chemicals, Inc.) through the lowpaymentfee.com platform. It is part of a broader suite of pay-per-request APIs covering data analytics, AI/ML inference, finance, crypto, and utility services. Payment is handled via the x402 protocol on the Base network using USDC, with each request costing $0.02 (20,000 base units of USDC with 6 decimals).
The endpoint accepts POST requests and returns JSON. No API keys or accounts are required — callers simply attach an x402 payment header with each request. The platform advertises no rate limits and instant access. The x402 challenge was successfully captured, confirming the endpoint is live and accepting payment challenges at version 1 of the protocol.
Documentation beyond the landing page is extremely sparse. The /docs, /api, /pricing, and /README pages all returned only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no detailed documentation describing the shape of the historical stock data returned. The specific fields, date ranges, and query parameters for the stocks history endpoint are unknown from the available material.
Capabilities
Use cases
- —Retrieving historical price data for APD (Air Products) for backtesting or analysis
- —Integrating stock history into an AI agent workflow with micropayment settlement
- —Building financial dashboards that pull historical equity data on demand
Fit
Best for
- —Agents needing on-demand historical stock data without API key management
- —Developers prototyping financial tools who want pay-per-call pricing
- —x402-compatible clients on the Base network looking for low-cost stock data
Not for
- —Bulk historical data downloads across many tickers (no batch endpoint documented)
- —Users who need comprehensive documentation or guaranteed SLAs
- —Non-crypto users who cannot settle payments in USDC on Base
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stocks/APD/history \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_header>"Endpoint
Quality
The x402 challenge is live and confirms pricing and payment details, but there is no OpenAPI schema, no request/response examples, and no meaningful documentation beyond the landing page. The actual data shape and query parameters are entirely unknown.
Warnings
- —No documentation available — /docs, /api, /pricing, and /README all return only a wallet connect prompt with no content
- —No OpenAPI or schema describing request parameters or response format for the stocks history endpoint
- —Request body structure and supported query parameters (date range, interval, etc.) are unknown
- —The endpoint URL is ticker-specific (/stocks/APD/history); it is unclear if other tickers are supported or how to discover them
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/stocks/APD/history
- —Platform pricing is $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/stocks/APD/history