Bug 7534, Bug 7614 and Bug 18072 let us limit the choices of pickup location when placing a hold. Add a REST API endpoint that uses this functionality. GET /biblios/{biblionumber}/pickuplocations GET /item/{itemnumber}/pickuplocations Returns an array of library-objects that represent a set of libraries that can be used as pickup locations for hold of the given biblio/item.
Duplicate of 23449?
I've done something similar for ILS-DI in bug 23015, if that can be of any help :) Glad to see this will exist in Rest API!
We added similar routes on bug 27931 and bug 27932.