Phone numbers to be added to an existing campaign, can be submitted as either a .CSV or .TXT file or a JSON array.

Example (JSON):

{
    "phone_numbers": "[\"tel:+12223334444; ani=7778889999, tel:+14443332222; ani=9998887777\"]",
    "campaign_id": 77
}

Note: Phone number entries can also include a message_reference value. Once submitted in an API request, this value will be posted to the URLs referemced in the start_url and result_url parameters. Adding message_reference values can help with identifying calls and API requests within your internal systems.

Example (message_reference):

{
    "phone_numbers": "[\"tel:+12223334444; ani=7778889999, tel:+14443332222; ani=9998887777, march campaign\"]",
    "campaign_id": 77
}