The ChangeNow API allows developers to integrate cryptocurrency exchange functionality directly into their applications, websites, or services. With the API, you can offer your users instant crypto swaps without building exchange infrastructure from scratch. The API supports all 500+ cryptocurrencies available on ChangeNow, provides real-time exchange rates, and handles all the complexity of cross-chain transactions.
The ChangeNow API offers: real-time exchange rate estimation, transaction creation and monitoring, supported currencies listing, minimum exchange amounts, transaction status tracking, and fixed-rate exchanges. The API uses RESTful architecture with JSON responses, making it easy to integrate with any programming language or framework. Rate limits are generous, and the API is highly reliable with 99.9% uptime.
To start using the ChangeNow API: 1. Sign up for an API key at changenow.io/api. 2. Read the API documentation. 3. Make your first API call to get available currencies. 4. Implement exchange rate estimation. 5. Create exchange transactions. 6. Monitor transaction status. The API is free to use, and you earn a commission on every exchange made through your integration.
Common integrations include: cryptocurrency wallet apps that offer built-in exchange, portfolio trackers with swap functionality, payment gateways that accept multiple cryptocurrencies, trading bots that execute automated swaps, and DeFi aggregators that include ChangeNow as a liquidity source. The API\'s simplicity means you can have a working integration in just a few hours.