This adds the missing functionality of Search into the WordPress REST API. The issue being with the current REST API Version 2, you can only search on a per post_type basis.
/wp-json/wp/v2/posts?filter[s]=apples
/wp-json/wp/v2/pages?filter[s]=apples
Adds the search functionality for all posts types except revisions and types with 'exclude_from_search' set to true.
/wp-json/wp/v2/search/apples
In case of a multi word string, just replaces the spaces with plus signs.
/wp-json/wp/v2/search/apples+pears
Also adds easy paging
page 2:
/wp-json/wp/v2/search/apples+pears/2
page 3:
/wp-json/wp/v2/search/apples+pears/3