Create a standalone ad group
Google Ads compliance row C.190: creates an ad group WITHOUT an ad, under an existing campaign. Ads join it later via adSetId on POST /v1/ads/create. Google only; every other platform returns 501.
Created PAUSED unless status: ACTIVE. The new ad group has no ad yet, so it will not appear in GET /v1/ads/tree (built purely from ads rows) until one is added; use GET /v1/ads/ad-sets to see it in the meantime.
Idempotency: send an Idempotency-Key header to make retries safe.
Headers
Optional client-generated unique key (e.g. a UUID) that makes retries safe. Same key + same body replays the original response; same key + different body → 422; key still processing → 409. Only 2xx responses are stored, so a request that failed with a 4xx can be retried with a corrected body under the SAME key.
Request body
Response
Ad group created