netbox/docs/plugins/development/data-backends.md

Data Backends

Data sources can be defined to reference data which exists on systems of record outside NetBox, such as a git repository or Amazon S3 bucket. Plugins can register their own backend classes to introduce support for additional resource types. This is done by subclassing NetBox's DataBackend class.

from netbox.data_backends import DataBackend

class MyDataBackend(DataBackend):
    name = 'mybackend'
    label = 'My Backend'
    ...

To register one or more data backends with NetBox, define a list named backends at the end of this file:

backends = [MyDataBackend]

!!! tip The path to the list of search indexes can be modified by setting data_backends in the PluginConfig instance.

::: netbox.data_backends.DataBackend