Which of the following can be integrated into a Mendix application?

The integration of external APIs and services into a Mendix application is regarded as an important capability, making it the correct choice. Mendix provides robust tools and frameworks that allow developers to connect their applications seamlessly with various external systems. This means that you can enhance the functionality of your Mendix application by consuming data or services provided by third-party APIs, enabling a wide range of possibilities such as retrieving data, processing payments, sending notifications, and more.

Using external APIs not only extends the features of a Mendix application but also supports interoperability in the broader digital ecosystem. This integration is facilitated by Mendix's platform, which offers functionalities such as REST and SOAP integration, allowing developers to easily configure connections to external services.

The other options are limited in scope. While Mendix can utilize its own components and templates, the ability to incorporate external APIs is essential for creating dynamic and data-rich applications. Similarly, the mention of hardware interfaces is highly specific and may not apply broadly to typical Mendix application scenarios, focusing instead on software interactions as the primary integration mechanism.