What functionality does "API Manager" provide in MuleSoft?

API Manager in MuleSoft is primarily responsible for managing and securing APIs. This functionality includes defining and enforcing policies such as security measures (like OAuth 2.0, basic authentication, etc.) and managing access to the APIs. It allows organizations to control who can access their APIs, thereby ensuring that they remain secure and that only authorized users can interact with them.

Additionally, API Manager provides tools for analyzing API usage, setting rate limits, and managing different versions of APIs, which are crucial for effective API governance and lifecycle management. This capability supports businesses in maintaining reliable and secure API ecosystems.

While there are related tools in MuleSoft for other activities, such as designing API interfaces or transforming data formats, those functionalities fall under different components of the MuleSoft ecosystem, like Anypoint Design Center for interface design and DataWeave for data transformation. Monitoring application performance is also handled by other tools within the MuleSoft suite, focusing specifically on operational performance rather than API management.