What is the correct REST URL in Drupal 8 (or 9)?

Question

I know there's been a lot of work to deprecate the extern endpoints in CiviCRM, and the extern endpoints don't work in Drupal 8 without a lot of finagling. The documentation isn't updated to reflect a new way of using D8 REST endpoints, nor is API Explorer. Does anyone know what the "correct" endpoint is?

Answer 1

I just installed a CiviCRM and Drupal 9 instance (5.40.1). These were my steps:

• I enabled the new authx extension cv ext:enable authx
• I allowed the authenticate with the api_key in a special header cv ev 'Civi::settings()->set("authx_xheader_cred",["api_key"]);' The auth extension does not have a configuration screen, yet.
• I added site key as an extra protection cv ev 'Civi::settings()->set("authx_guards",["site_key"]);'.
• I flushed the CiviCRM cache cv flush

And now the following CURL command can be used to call the REST api:

curl -X GET --location "http://<<server>>/civicrm/ajax/rest? 
entity=Contact&action=get&json=1" \
-H "X-Civi-Auth: Bearer <<api_key>>" \
-H "X-Civi-Key: <<site_key>>" \
-H "Accept: application/json" \
-H "X-Requested-With: XMLHttpRequest"

Answer 2

My previous answer here is now out dated. Now the endpoint is /civicrm/ajax/rest. But first you must enable the AuthX extension (Administer menu » System Settings » Extensions). Then you'll have an Authentication menu at Administer menu » System Settings » Authentication. There is a link to documentation from there that provides instructions for more complex workflows.