Open edX API and Discovery API


I would like to promote our courses by Program. As I read, Program must be created in Discovery Service and they can be retrieved by Discovery API. So I did create some Programs in Discovery Service but then, don’t know how to call Discovery API. I can try edX API in https://localhost/api-docs/ but I don’t find Discovery API in https://localhost:18381/api-docs/ (I’m running native release Koa.2a). The https://localhost:18381/api-docs/ returns “Server Error (500)”. And I also cannot find any document explain how to deal with Discovery Service for Native installation as well as which Discovery API can be used for retrieving Programs.

Anyone can help please? I would like to check Discovery API as we can do with edX API (by using https://localhost/api-docs/)

Thank you