I tried @CiscoUser 's solution and could not make it work. However, I managed to find the documentation of that functionality under the following API: https://developer.cisco.com/meraki/api/#!provision-network-clients under schema definition. You should set Per connection policy and list the SSIDs you would like to change the device's policy for them   Here is an example for a request's body that would block device for specific SSIDs: {    "mac": "aa:aa:aa:aa:aa:aa",     "devicePolicy": "Per connection",     "timespan": 2592000,     "policiesBySsid": {        "9": {          "devicePolicy": "Blocked"        }     } }   Sending this body in a post request to /networks/{networkId}/clients/provision will block any device with MAC aa:aa:aa:aa:aa:aa from connecting to SSID on index 9(you can get that using GET /networks/{networkId}/ssids) ... View more

Happy Sunday @CiscoUser  As per Cisco Meraki documentation, APIs are rate limited to 5 calls per second per organisation. https://documentation.meraki.com/General_Administration/Other_Topics/Cisco_Meraki_Dashboard_API   This limit is Cisco Meraki wide and there is no way to increase this limit, at least for the time being. Please make use to the Make-a-Wish button in your dashboard to give your feedback to the Cisco Meraki team.   Keep an eye out on the API documentation as it will be update whenever any changes are made, and on that note, also regularly check the Announcements button at the top of your dashboard and the new released features section under Help > New Features. Have a good weekend! ... View more

If the client info you want is not changing frequently you would walk over every network and dump every client to something local.  Then you could just query that local database.   Note that a client could appear under multiple networks, especially a WiFi user that travels between networks. ... View more

I wanted to add that I noticed that unfortunately that only works for clients that are known in the dashboard. If you've added a client manually that call doesn't seem to return a result. ... View more

No, unfortunately I don't. However I think Meraki will have to think about a solution for bulk requests. Because I regularly see people with this problem (running against the 5 calls per second per organization limit). Just like the dashboard the API is always evolving. Definitely make a wish about it! ... View more