If you only need the library name and ID in the response, then you can use the plain library list (ApiPlainLibraryList) as an alternative to the full library list (ApiLibraryList). It is usually much faster than the standard library list API method, but returns much less information.
libraryId of your target library. The library ID is one of the most commonly used identifiers in the AODocs APIs.
Additional response fields to note:
name (of the library)