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, every permission for every user will be returned.

curl --user john.doe:itsasecret http://server001:15671/api/permissions

Something like this should be returned.

[
 {"user":"john.doe","vhost":"vhost001","configure":".*","write":".*","read":".*"}, 
 {"user":"jane.doe","vhost":"vhost002","configure":".*","write":".*","read":".*"}
]

Here is how to list an individual users permissions.

curl --user john.doe:itsasecret http://server001:15671/api/user/john.doe/permissions

Which should return something like this.

[
 {"user":"john.doe","vhost":"vhost001","configure":".*","write":".*","read":".*"}
]