Ads and Commerce

Reach Estimate API

Updated: Apr 27, 2026
Copy for LLM
Get a range of individuals for your targeting and what bids to make to reach that target group with the /reachestimate API. You can call this API in one of these ways:
  • Specify an ad account and a targeting spec:
curl -G \
  --data-urlencode 'targeting_spec={
    "geo_locations": {"countries":["US","GB"]},
    "publisher_platforms": ["instagram"],
    "user_os": ["iOS"]
  }' \
  -d 'optimize_for=IMPRESSIONS' \
  -d 'access_token=<ACCESS_TOKEN>' \
https://graph.facebook.com/v25.0/act_<AD_ACCOUNT_ID>/reachestimate

Reference