The Searchdomain-AvailablePackages interface includes settings various settings.

Table: Searchdomain-AvailablePackages

filterstring  interface searchdomain-availablepackages The filter input to limit the returned packages.
tagsRepoOrViewNameyes Packages with any of these tags will be included. No filtering on tags. The type, RepoOrViewName is a scalar.
categories()string): PackageRegistrySearchResultItem  Packages with any of these categories will be included.

[a] Some arguments may be required, as indicated in this column. For some fields this column indicates that a result will always being returned for it.