Magento being a highly flexible and robust eCommerce platform, is easy to integrate with other applications. Magento 2 API framework makes the platform accessible from any other applications for various purposes.
Magento 2 API allows the developers to communicate while developing or integrating third-party applications. Magento provides two types of APIs: REST and SOAP. Developers may require using these APIs while configuring or integrating other applications with the Magento 2 store.
The Magento 2 APIs supports three types of request authentications, which are Token-based, Session-based, and OAuth-based. You can read more about Magento 2 API at: https://meetanshi.com/blog/magento-2-api/