Redmine

We have a lot of projects with different project prefix for scoped issue id.

I'm going to write a tool for scheduling issues and for my weekly report.

With my investigation, it is possible to query issue details from the scoped id and native id.

But didn't find anything about the project scope issue id in the redmine's RESTFUL API document, and there's no scoped issue id in the /issues.xml response, is there any way to get it from the issues native numeric id?

Thanks!