Function: Given an array of fields to include in a response, some of which may be `nested.fields`, determine whether the provided field should be included in the response body.

Function: Append result of internal request to REST API for purpose of preloading data to be attached to a page.

Function: Filter the API response to include only a white-listed set of response object fields.

Function: Sanitize a value based on a schema.

Function: Retrieves the avatar urls in various sizes based on a given email address.

Function: Retrieves the pixel sizes for avatars.

Function: Validate a value based on a schema.

Function: Determines if an IP address is valid.

Function: Changes a boolean-like value into the proper boolean value.

Function: Determines if a given value is boolean-like.

Function: Returns a contextual HTTP error code for authorization failure.

Function: Validate a request argument based on details registered to the route.

Function: Sanitize a request argument based on details registered to the route.

Function: Parse a request argument based on details registered to the route.

Function: Registers a new field on an existing WordPress object type.

Function: Registers default REST API routes.

Function: Retrieves the current REST server instance.

Function: Parses a date into both its local and UTC equivalent, in MySQL datetime format.

Function: Sends Cross-Origin Resource Sharing headers with API requests.

Function: Handles OPTIONS requests for the server.

Function: Sends the “Allow” header to state all methods that can be sent to the current route.

Function: Adds the REST API URL to the WP RSD endpoint.

Function: Outputs the REST API link tag into page header.

Function: Sends a Link header for the REST API.

Function: Checks for errors when using cookie-based authentication.

Function: Collects cookie authentication status.

Function: Parses an RFC3339 time into a Unix timestamp.