Use the following endpoint to activate the cart:

• Base URL: /api/cart/v1/carts/{cartId}/activate

This API tags the activation date on the cart and launches it.

On success, the API returns HTTP 200 OK and the updated cart details. The response is similar to the following example:

{
  "ApprovalStatus": "None",
  "BusinessObjectProfile": "Regular",
  "ContractNumbers": "",
  "EffectiveDate": "2025-10-17T08:43:02.54",
  "EffectivePriceList": {
    "Id": "1d030b2b-b720-476f-9063-f1ec3617672f",
    "Name": "CollaborationPriceList"
  },
  "IsPricePending": false,
  "IsTaskPending": false,
  "IsTransient": false,
  "IsValidationPending": false,
  "NumberOfItems": 0,
  "PriceList": {
    "Id": "1d030b2b-b720-476f-9063-f1ec3617672f",
    "Name": "CollaborationPriceList"
  },
  "PricingDate": "2025-10-17T08:43:02.54",
  "Status": "New",
  "SummaryGroupType": "Category",
  "UseType": "Main",
  "VersionNumber": 0,
  "ActivationDate": "2025-10-17T08:43:34.915",
  "Currency": "USD",
  "Owner": {
    "Id": "f776e210-7f8f-b628-2053-ef392a7a57e7",
    "Name": "Test User"
  },
  "Id": "4a9be0c0-97c5-4c5e-8abb-2294c3c17f68",
  "Name": "ProposalName",
  ...
}