您正在寻找的 API 称为Reachestimate。您可以使用您拥有的目标来调用它,并将返回预期的数据。
例如,使用作为目标规范:
{
    "publisher_platforms": ["facebook"],
    "facebook_positions": ["feed", "right_hand_column"],
    "device_platforms": ["mobile", "desktop"],
    "geo_locations": {
        "countries": [],
        "custom_locations": [],
        "zips": [],
        "cities": [{
            "key": "2421905"
        }],
        "regions": [],
        "country_groups": [],
        "geo_markets": []
    },
    "excluded_geo_locations": {
        "countries": [],
        "custom_locations": [],
        "zips": [],
        "cities": [],
        "regions": [],
        "country_groups": [],
        "geo_markets": []
    },
    "genders": [1, 2],
    "age_min": 18,
    "age_max": 65,
    "relationship_statuses": [],
    "connections": [],
    "excluded_connections": [],
    "friends_of_connections": [],
    "interests": [{
        "id": "6003087413192",
        "name": "Baseball"
    }]
}
以下 API 调用:
curl -i -X GET \
 "https://graph.facebook.com/v3.2/act_XXX/reachestimate?targeting_spec=%7B%22publisher_platforms%22%3A%5B%22facebook%22%5D%2C%22facebook_positions%22%3A%5B%22feed%22%2C%22right_hand_column%22%5D%2C%22device_platforms%22%3A%5B%22mobile%22%2C%22desktop%22%5D%2C%22geo_locations%22%3A%7B%22countries%22%3A%5B%5D%2C%22custom_locations%22%3A%5B%5D%2C%22zips%22%3A%5B%5D%2C%22cities%22%3A%5B%7B%22key%22%3A%222421905%22%7D%5D%2C%22regions%22%3A%5B%5D%2C%22country_groups%22%3A%5B%5D%2C%22geo_markets%22%3A%5B%5D%7D%2C%22excluded_geo_locations%22%3A%7B%22countries%22%3A%5B%5D%2C%22custom_locations%22%3A%5B%5D%2C%22zips%22%3A%5B%5D%2C%22cities%22%3A%5B%5D%2C%22regions%22%3A%5B%5D%2C%22country_groups%22%3A%5B%5D%2C%22geo_markets%22%3A%5B%5D%7D%2C%22genders%22%3A%5B1%2C2%5D%2C%22age_min%22%3A18%2C%22age_max%22%3A65%2C%22relationship_statuses%22%3A%5B%5D%2C%22connections%22%3A%5B%5D%2C%22excluded_connections%22%3A%5B%5D%2C%22friends_of_connections%22%3A%5B%5D%2C%22interests%22%3A%5B%7B%22id%22%3A%226003087413192%22%2C%22name%22%3A%22Baseball%22%7D%5D%7D&access_token=<user_token>"
将返回:
{
  "data": {
    "users": 12000,
    "estimate_ready": true
  }
}
希望这有帮助