register_rest_route()

register_rest_route() — Registers a REST API route. Note: Do not use before the {

Inputs: $route_namespace (string): The first URL segment after core prefix. Should be unique to your package/plugin. $route (string): The base URL for route you are adding. $args (array): Optional. Either an array of options for the endpoint, or an array of arrays for multiple methods. Default empty array. $override (bool): Optional. If the route already exists, should we override it? True overrides, false merges (with newer overriding if duplicate keys exist). Default false.

Returns bool: True on success, false on error.