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Create Lookalike Audience
Creates a Lookalike audience from seed audiences.
- Type
- Makes changes
- Credits
- 5
- Platform
- Google Ads
- Approval
- Preview first, applied after you approve
What it does
Creates a Lookalike audience from seed audiences. seed_user_list_ids and country_codes are comma-separated lists (user list ids; ISO country codes). expansion_level: NARROW | BALANCED | BROAD. list_audiences returns valid seed ids. confirm=false → dry-run.
MCP: create_lookalike_audience
How to use it
You don't call tools by name. Write what you want in ChatGPT, Claude or another assistant connected to Opus Growth, in your own words; it picks this tool when it fits.
Because this tool changes your account, your assistant first shows a preview of exactly what will change. Nothing is applied until you say yes, and every applied change is written to your audit log.
Parameters
| Name | Type | Required | Default | |
|---|---|---|---|---|
| customer_id | string | Required | · | Google Ads customer account ID to query or change. Use the numeric ID returned by list_accounts; omit separators unless this tool explicitly says otherwise. |
| name | string | Required | · | Human-readable name for the resource being created or updated. |
| seed_user_list_ids | string | Required | · | One or more exact seed user list identifiers to target. Use identifiers returned by an Opus Growth list or create operation, not display names. |
| country_codes | string | Required | · | Exact country codes value for create lookalike audience. Supply text in the provider's required format; when it selects an existing resource, use the exact identifier returned by the relevant list or search operation. |
| expansion_level | string | Optional | BALANCED | NARROW · BALANCED · BROAD · Exact expansion level value for create lookalike audience. Supply text in the provider's required format; when it selects an existing resource, use the exact identifier returned by the relevant list or search operation; matching the schema pattern. |
| membership_days | integer | Optional | 30 | Audience membership duration in days, within the provider's allowed range. |
| confirm | boolean | Optional | false | Safety confirmation for a state-changing operation. Leave false to preview or validate; set true only after the user explicitly approves the shown change. |
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