Currently there's only "Unique cookies"...
There's all these metrics available which aren't an option currently:
Is there a technical reason why these aren't available to query?
If not is there a plan to include them soon?
Thanks for contacting us.
I can't see any immediate obstacle for adding these as I see them in the API reference. I've made a request to our developers about it, they'll reach out if/when the metrics are added.
Heidi / Supermetrics
Unfortunately, it seems that in addition to "Unique cookies", only "Avg. impr. freq. per cookie" field can be fetched from AdWords API.
I'll add the field this week.