coinapi.io

# CoinAPI > CoinAPI provides real-time and historical cryptocurrency market data, exchange rates, indexes, flat files, and execution management through REST APIs, WebSocket feeds, and MCP servers. ## Website Pages - [CoinAPI](https://www.coinapi.io/): Cryptocurrency market data APIs for trading, analytics, and AI applications. - [Analyzing Lead–Lag Effects Between Exchanges Using Flat Files](https://www.coinapi.io/tutorials/analyzing-lead-lag-effects-between-exchanges-flat-files): Price discovery in crypto markets happens across multiple exchanges simultaneously. When prices move, they may appear on one exchange slightly earlier than others before propagating across the market. This is known as the lead–lag effect. - [Flat Files FAQ](https://www.coinapi.io/products/flat-files/faq) - [Exchange Rates API FAQ](https://www.coinapi.io/products/exchange-rates-api/faq) - [Market Data API FAQ](https://www.coinapi.io/products/market-data-api/faq) - [Exchange Rates API Data Samples](https://www.coinapi.io/products/exchange-rates-api/data-samples) - [Indexes API Data Samples](https://www.coinapi.io/products/indexes-api/data-samples) - [Exchange Rates API](https://www.coinapi.io/products/exchange-rates-api) - [Flat Files - Crypto data download](https://www.coinapi.io/products/flat-files) - [EMS Trading API](https://www.coinapi.io/products/ems-api) - [Indexes API](https://www.coinapi.io/products/indexes-api) - [MCP](https://www.coinapi.io/mcp) - [Market data API](https://www.coinapi.io/products/market-data-api) - [Tutorials](https://www.coinapi.io/tutorials) - [Trade Flow Imbalance Detector](https://www.coinapi.io/tutorials/trade-flow-imbalance-detector): This tutorial shows how to build a real-time Trade Flow Imbalance Detector using CoinAPI’s Market Data WebSocket trade stream. - [Latency Comparison Between Exchanges](https://www.coinapi.io/tutorials/latency-comparison-between-exchanges): This tutorial shows how to measure and compare data latency across exchanges usi