Creates or updates multiple contacts in a single batch operation. This is significantly more efficient than individual upsert operations. Optionally subscribes all contacts to specified lists.
API token for authentication
The ID of the workspace
"ws_1234567890"
Array of contacts to import (create or update)
1[
{
"email": "[email protected]",
"first_name": "John",
"last_name": "Doe"
},
{
"email": "[email protected]",
"first_name": "Jane",
"last_name": "Smith"
}
]Optional array of list IDs to subscribe all contacts to
["newsletter", "product_updates"]