Convert global issue ID to project issue ID

When I query the API api/issues/ for issues with fields="id", I get back an array of issues similiar to this:

[
  { "id": "2-120" }
]

This works for further calls because 2-120 can be used in calls to /api/issues/{id}. However, I also need to display those IDs to users, which are more comfortable with project-based IDs, like EX-10. (Also, the whole browser user-interface is structured around those project issues ids)

What I tried:

• Had a look at the Issue JSON Schema docs, which do not seem to contain an additional ID
• Tried to find out if they can be converted manually, which does not seem to be the case.

So, how can I convert global issue IDs, like 2-120, to project issue IDs, like EX-10?

After looking at the schema again, I simply overlooked idReadable. So, a request to api/issues/PA-102?fields=id,idReadable will give you both types of IDs.

{ "id": "2-120", "idReadable": "PA-20" }