I checked the V1/modules API and found that "Magento_Review" is present. What I couldn't find is the REST API to access and add reviews for a product.
Reviews/Rating are integral part for any eCommerce platform and We wish Magento guys would have included them in the core features. So we have taken the initiative and added these features by taking out the fork from the github. We are waiting for Magento guys to Merge our pull request. In the meanwhile you can take use the following forks for your online store:
Or you can download our free plugin from the following links Review/Rating API Plugin : http://www.ipragmatech.com/products/review-rest-api-magento/
It seems that is not implemented yet.
I thought that was implemented in catalogProductRepositoryV1, but isn't and can't find any special end-point for that too.
I wish I'm wrong