By default, all new Google Cloud projects using the Android Management API are allocated a "default" quota of 0 devices per project. This is separate from the API request rate limits covered elsewhere.
What the device quota means
The device quota limits how many devices can be enrolled across all enterprises created under a single Google Cloud project. For most organisations using a commercial EMM, this is managed by the EMM vendor and is not something individual customers need to worry about - the EMM's project quota covers their entire customer base.
When this matters
The quota becomes relevant if you are:
Requesting an increase
To obtain an initial quota, you must apply through Google's partner validation process. This involves demonstrating that your solution meets Google's requirements for an EMM partner. The process is documented in the AMAPI permissible usage page.
Note that quota increases are not automatic and require review. Plan ahead if you anticipate scaling beyond the default limit, as the validation process takes time.