| Name | Type | Description | Notes |
|---|---|---|---|
| phone_numbers | string[] | Telephone numbers in E.164 format. | |
| rcs_agent | string | Override the default RCS sender/agent ID used when checking RCS capabilities. When provided, this value is used as the `sender` in the RCS capability-check request instead of the account default. Must be 1–40 characters and contain only letters, digits, underscores, or hyphens. | [optional] |