ccxt

CCXT provides a unified API that works across 150+ exchanges like Binance, Kraken, and Coinbase. Install CCXT in your project, instantiate an exchange (e.g., `ccxt.binance()`), and call methods like `fetch_markets()` or `fetch_ticker()` with consistent syntax across all supported exchanges.

Yes. CCXT supports order placement, market data fetching, and account management across exchanges. Use methods like `create_order()`, `fetch_balance()`, and `fetch_ohlcv()` to build bots in JavaScript, Python, or PHP. Handle authentication securely and implement error handling for network and exchange-specific failures.

Common challenges include API rate limits, authentication errors, inconsistent response formats between exchanges, and connectivity timeouts. CCXT troubleshooting covers debugging these issues, validating credentials, handling rate-limit exceptions, and using retry logic with appropriate backoff strategies.

CCXT supports REST APIs by default. CCXT Pro adds WebSocket streaming for real-time market data and order updates when needed. Check exchange-specific support for streaming endpoints and use Pro subscriptions for continuous data feeds across supported exchanges.

CCXT is available in JavaScript, Python, and PHP. All three implementations provide the same unified API and support the same 150+ exchanges, so you can choose based on your project's tech stack and deploy consistently across languages.

Use CCXT's `fetch_ohlcv()` method to retrieve candlestick data across timeframes and exchanges. Specify the symbol, timeframe (1m, 5m, 1h, 1d, etc.), and optional since parameter to paginate historical data. Combine with loops and rate-limit handling for complete datasets.