This assumes you have created a RabbitMQ user with the administrator tag.

Refer to the RabbitMQ REST API documentation.

The curl command with the --user option can be used to make an API connection to RabbitMQ. In this example, John Doe will make a connection to the RabbitMQ server listening on port 15671 and then delete a policy named a.policy.

curl
--request DELETE
--user john.doe:itsasecret
--url http://hostname:15671/api/policies/vhost001/a.policy
--write-out "%{http_code}"

For the / vhost, use %2F

curl
--request DELETE
--user john.doe:itsasecret
--url http://hostname:15671/api/policies/%2f/a.policy
--write-out "%{http_code}"

No output will be returned, regardless if the policy is or is not deletd. For this reason, the -w or --write-out option is included to get the return code of the curl command.