WSO2 API Manager provides capability to build and nurture an active community of API consumers with various community features such as commenting and rating.
Rating and Commenting
Consumers can rate APIs per version and comment on them. Potential API subscribers can use comments and rates as guidelines on the quality and usefulness of an API. Commenting and rating help create a community around a particular API. Comments appear sorted by the time it was entered, alongside the author's name. Commenting is similar to a forum for subscribers, who can discuss common issues/features pertaining to a given API version.
Shown below is how comments/rates of a published API is visible to subscribers through the API Store. To rate an API, and click on any available API.