What is the API call to find the MAC address of Meraki APs?
https://developer.cisco.com/meraki/api-latest/#!get-organization-devices
When I run that command, it does not show the APs, just our Mx and MS.
So you don't have APs o this org.
In every network, we have a MX, MS and AP.
Try this: https://developer.cisco.com/meraki/api-latest/#!get-network-devices
Or open a support case
Or you could use this, to see all the devices you have in your organization inventory
https://developer.cisco.com/meraki/api-v1/#!get-organization-inventory-devices
If you are not using the Python library and if there are a lot of devices you'll need to handle multipage results, are you doing that?
Set the productTypes parameter (it's an array) to just one element "wireless", then you'll only get matching devices returned. Makes it simpler.