In this era of rapid technological advancements, APIs – or Application Programming Interfaces – play a crucial part in connecting the digital world. They become the gateways that allow different software systems to interact and share information with each other seamlessly, making our lives profoundly convenient. However, with such convenience, comes significant risks and vulnerabilities. These gateways, if unprotected, could also allow unauthorized access to sensitive data or facilitate malicious acts. That's where robust API security solutions come into play.

API security solutions serve as a protective shield for APIs, providing comprehensive security to keep applications, data, and systems safe from threats. They are specially designed to detect and mitigate threats by employing advanced strategies and mechanisms to protect, control, and discover – all in real-time.

Protecting APIs from various security threats is one of the primary responsibilities of API security solutions. They employ a range of sophisticated tools, including encryption, authentication, and authorization measures, to ensure that only authorized users can access particular APIs. This not only prevents unauthorized access but also shields the systems from cyber-attacks that could use APIs to infiltrate the system.

API security solutions offer in-depth control over the interactions happening through APIs. By logging and monitoring every API call or transaction, they can keep track of any unusual activity. The comprehensive visibility provided by these solutions allows IT teams to efficiently manage APIs and their associated security risks.

Moreover, API security solutions are designed to deal with the challenge of discovering potential threats in real-time. With state-of-the-art AI and machine learning technologies, these solutions can identify any suspicious activities, detect patterns and anomalies that might signify a security incident. It could be a sudden spike in API calls, an unusual sequence of requests, or rogue APIs - all these are instantly flagged by the solution, notifying the concerned teams for immediate action.

These features of robust API security solutions add an irreplaceable layer to the defense mechanisms of digital businesses, protecting and controlling the API ecosystem while allowing for real-time discovery of threats.

Therefore, in a world where data breaches and cyber-attacks are increasing at an alarming rate, having robust API security solutions is not a luxury, it's a necessity. It not only safeguards the API gateways but also the reputation and trustworthiness of the business itself. In the face of the ever-evolving threat scenario, such cutting-edge security solutions affirm that protection, control, and real-time discovery continue to be the touchstone of a secured API ecosystem.