CoinAPI
CoinAPI is a market data API for crypto assets that collects trades, quotes and order books from more than 400 exchanges and delivers them in one format. Developers connect over REST, WebSocket, FIX or the Model Context Protocol for AI agents, with software development kits for more than 15 programming languages. CoinAPI is part of API Bricks, which also runs trading APIs for exchanges.
The archive reaches back more than ten years, and paid plans come with a service level of 99.9 percent availability. Artur Pietrzyk, chief executive of CoinAPI, has said that the company officially started in 2017.
Historical data and flat files
Flat Files deliver the history as compressed files in Amazon S3 buckets, which suits backtests over many years and many exchanges. The same data is available through the REST API for smaller requests and through WebSocket streams in real time.
Order book data and WebSocket
The WebSocket stream sends trades, quotes and full order book updates as they happen, normalized to one symbol scheme across all exchanges. Trading teams use it to feed algorithms, and analysts use the same symbols to join the stream with historical data.
Exchange rates, indexes and trading
The Exchange Rates API returns rates between any two assets based on a volume-weighted average price, and the Indexes API publishes CoinAPI indexes such as PRIMKT and the volatility index CAPIVIX. The EMS Trading API and Exchange Link route orders to many exchanges through one interface.
Upcoming crypto and data events in Germany
Which protocols does CoinAPI support?
CoinAPI supports REST, WebSocket, FIX and the Model Context Protocol for AI agents, plus flat files delivered through Amazon S3.
How far back does the history go?
The archive covers more than ten years of trades, quotes and order books from more than 400 exchanges.
Who uses the API?
Trading firms, fintech developers, research teams and AI agent builders use it when they need data from many exchanges in one format.
CoinAPI and Finance Loop
Market data APIs connect trading systems and research tools to crypto exchanges, a topic of the Finance Loop track Investment & Digital Assets. CoinAPI is one of the crypto price feed providers that developers at banks and fintechs test when they build crypto products.
Finance Loop is a professional network and has the goal of driving the adoption of emerging technologies in finance, such as AI, tokenization, stablecoins, and DeFi. Finance Loop helps its members build skills and personal networks in these fields: Investment & Digital Assets, Payments & Digital Money, Digital Infrastructure & Sovereignty, and Risk & Compliance.