You can use LogicMonitor REST API v3 to update recipient group details. You must authenticate yourself before making the API request.

URI: PATCH /setting/recipientgroups/{id}

URI: PUT /setting/recipientgroups/{id}

Parameter	Type	Description
id	Integer	(Mandatory) The Id of the recipient group whose details you want to update.
groupName	String	(Mandatory) The name of the recipient group that you want to update. Example – "groupName": "Tier 2 Helpdesk"
recipients	JSON Array	A recipient is a user or email address that receives alerts for specific events. The field contains information of the recipients in the group. A recipient group has multiple alert delivery recipients. Because it contains multiple user accounts or other recipient groups, it becomes easy to notify a variety of alert types to recipients of the same group. The field contains the following information about the recipients: type – (Mandatory) Supported recipient types are GROUP, ARBITRARY, and ADMIN. Here, ADMIN indicates a user and ARBITRARY indicates an arbitrary email. method – (Mandatory) Supported methods are EMAIL, smsEMAIL, VOICE, SMS, and LM integrations. The method varies as per the recipient type. ARBITRARY – use email. ADMIN – use EMAIL, smsEMAIL, VOICE, SMS, or the defaultMethod. GROUP – does not require a method. contact – It includes the email address or phone number of the recipients. addr – If the type is Admin provide the username, and if the type is Arbitrary provide the email address of the recipients.
description	String	The description of the recipient group. Example – "description": "Tier 2 Helpdesk"