Use the “Infinity” data source plugin.
https://grafana.com/docs/plugins/yesoreyeram-infinity-datasource/latest/
The Infinity data source plugin allows you to query and visualize data from JSON / CSV / GraphQL / XML / HTML endpoints.
In memory, for OVH : In the data source configuration, use a bearer key. I didn’t find another way.
You can find a bearer key in the new version of the OVH API website. I don’t recommend it for production, though. If this key was somehow leaked, someone would have complete control of the account.