| Name | Required | Description |
|---|---|---|
| X-Session-Token | Yes | - |
| Content-Type | Format |
|---|---|
| application/json | object |
| Field | Type | Required | Description |
|---|---|---|---|
| conversation_id | string | Yes | Conversation uniqid to reply to |
| body | string | Yes | Reply message body |
| to | string | No | Recipient selector: 'all' or a user id |