Trying out the early access API "Get Organization Appliance Uplinks Usage By Network". This API gets uplink usage of all Networks in an Organisation. Using the same account/API key, it works on some Organisation but on others it is throwing up a "404 error".
Some Organisation doesn't have MX so it make sense that it might not work but some Organisations do have MX/Appliance but still showing error.
API details: https://developer.cisco.com/meraki/api-v1/#!get-organization-appliance-uplinks-usage-by-network
I am aware there is another API that gets this information on a Network level https://developer.cisco.com/meraki/api-latest/#!get-network-appliance-uplinks-usage-history but will need to run multi requests for an Org which a lot of Networks.