Get Crypto Price (minimal guide)

This short guide shows how to fetch current prices and at least 3 months of past price action using CoinGecko, Binance, and Coinbase public APIs. It also shows how to compute ATH (highest) and ATL (lowest) within time windows: 1 DAY, 1 WEEK, 1 MONTH.

Quick notes

• Timestamps: many APIs return milliseconds since epoch (ms) or seconds (s). Convert consistently.
• Rate limits: respect exchange rate limits; cache responses when possible.
• Symbols: use canonical pair symbols (e.g., BTCUSDT on Binance, bitcoin on CoinGecko).

1) CoinGecko (recommended for simple historical ranges)

• Current price (curl):