Coinlayer

Coinlayer provides a one-stop API solution for real-time and historical cryptocurrency exchange rate data that scores with its simplicity, reliability and performance. Users can monitor values and market exchange rates. For developers, the Coinlayer API comes with a series of endpoints, functionalities and options. The coinlayer API is capable of delivering accurate exchange rate data for more than 385 cryptocurrencies in real-time.

CoinMarketCap API

The CoinMarketCap API is a enterprise-grade cryptocurrency API for all crypto data use cases. The API is a suite of high-performance RESTful JSON endpoints that allow application developers, data scientists, and enterprise business platforms to tap into the latest raw and derived cryptocurrency and exchange market data as well as years of historical data.

CoinAPI

Started in 2017 by  Artur Pietrzy, CoinAPI is a platform which provides fast, reliable and unified data APIs to cryptocurrency markets. Users can gain access to real time data. CoinAPI offers the various interfaces for developers including RESTful, a stateless API that offers a wide range of data and WebSocket, a stateful API that offers real time market data.

Coincap

CoinCap is a tool for real-time pricing and market activity for many cryptocurrencies. Users can receive accurate data on asset price and availability. For developers, the API will offer insight into exactly which exchanges and markets contribute to CoinCap’s pricing. For all endpoints, a single page offers 100 responses by default and supports up to 2,000 responses per page upon requests.

Nomics API

Nomics is an API-first crypto asset data company delivering accurate and professional-grade market data APIs to institutional crypto investors and exchanges. Nomics offers users products & services that allow funds, fintech apps, and exchanges to access clean, normalized as well as gapless primary source trade. Developers can run the API and use end-points in their programmes.

CoinGecko API

The CoinGecko data market APIs are a set of robust APIs. Users can retrieve cryptocurrency data such as price, volume, market cap, and exchange data  CoinGecko API allows developers to power applications with CoinGecko’s independently sourced crypto data such as live prices, trading volume, exchange volumes, trading pairs, historical data, contract address data, crypto categories, crypto derivatives, images and more.