List deals associated with an organization

I’m trying to filter this GET, by deals won.

I have a filter that’s called “All Won Customers”.

The condition is: Deal, status, =, Won.

I looked it up, that filers id is: 2.

        "id": 2,
        "name": "All Won Customers",
        "active_flag": true,
        "type": "deals",

This is my URL from Postman. https://api.pipedrive.com/v1/organizations/2261/deals?filter=2&api_token=336

I still get lost deals in this return.

Why???

Your question can be answered by reading the docs:
https://developers.pipedrive.com/docs/api/v1/Organizations#getOrganizationDeals

You are using an /organizations endpoint.
The filter parameter is not defined for this endpoint.
Just use the status=open parameter here.