This looks like an Ansible playbook for Zabbix. We support the Meraki Ansible collection. I assume the Zabbix community supports the Zabbix Ansible collection.   That said, you can use the API analytics page and download the API call log (preferably shortly after an attempt to run this playbook). If the 400 error is coming from Meraki (and not Zabbix) - you'll be able to see the API call being made and probably find the reason it gets a 400 response back. If you don't see the API call in the log, the 400 error might be coming from somewhere else, before an API call is made to Meraki. ... View more