This is the advanced mode for developers who are comfortable working with the WordPress API. You provide the HTTP method, URL, auth credentials, and URL params and/or body, and it sends it for you. Basically, a thin wrapper around the cURL command.
Functions
Advanced Custom Fields: Retrieve Taxonomy ACF Fields
Retrieve ACF fields and values for a single taxonomy.
Advanced Custom Fields: List Taxonomy ACF Fields
Retrieve ACF fields and values for a list of taxonomies.
Advanced Custom Fields: Retrieve Custom Content Type ACF Fields
Retrieve ACF fields and values for a single custom content type object.
Advanced Custom Fields: List Custom Content Type ACF Fields
Retrieve ACF fields and values for a list of custom content type objects.