Which part of the API can be used to implement this recommendation function

We are planning to develop an app whose main function is to help merchants send emails to consumers who have bought certain products. Assuming that a consumer has purchased product A, we hope to recommend other products that are most likely to be purchased by this consumer. Which part of the API can be used to implement this recommendation function? Thank you very much.

Hi @edward - have you reviewed this doc: Product Recommendations API reference