ads

Call ads.build_lookalike

Ask the ad platform to find people who resemble one of this brand's audiences — 'build a lookalike audience from our customers', 'find people like our best customers'. Ask the ad platform to build a new audience of people who resemble one of this brand's customer lists. Nothing about the customers leaves us — the ad platform models from the audience it already holds. The new audience has no size until the platform finishes building it, so never state a size you were not given. Not for a new, empty customer audience — that is ads.build_audience.

Every result names the workspace it ran in. Say which workspace the answer is about. When the account has more than one workspace and none is selected, this tool refuses with workspace_ambiguous and lists the choices — offer them, never pick one.

post/api/v1/tools/ads.build_lookalike

Request

  • Base URL: https://app.goosybear.ai
  • URL: https://app.goosybear.ai/api/v1/tools/ads.build_lookalike
  • Auth: HTTP bearer

Headers

x-request-idstring

Your own id for this request, echoed back and recorded on the audit trail. 1–128 characters from A–Z a–z 0–9 . _ : -, starting with a letter or digit; anything else is replaced by a generated id.

Request body

source_audience_idstring uuid required

The audience's id, as listed on the audiences page.

namestring required

What to call the new lookalike.

countrystring required

Two-letter country code the lookalike is built within, e.g. US.

percentinteger required

How close a match, as a whole percent from 1 to 20. 1 is the closest and smallest; 20 is the broadest.

workspacestring

Which workspace to run in — its slug. Omit to use your default. With more than one reachable workspace and no default, the call is refused and the choices are listed.

Response

The call was admitted and dispatched. ok says whether the tool succeeded — a refusal the tool itself produced is still a 200, exactly as it is a successful JSON-RPC result over MCP.

OR

Changes

No recorded changes to this operation across all 6 revisions of this API.