According to https://docs.civicrm.org/dev/en/latest/api/v3/rest :
"As of v5.47+, there should be no reason to use extern/rest.php - other end-points should be more compatible and more featureful. See APIv3 Changelog for migration notes."
but a simple http request like:
results in
Ajax requests can only be issued by JavaScript clients, eg. CRM.api3
Does this mean I need to create a JavaScript client as a front-end to my http call?