contact.group.added/1

Contact added to a group. A contact joined a contact group.

Payload

We POST this JSON to your endpoint. Answer any 2xx within 30 seconds. The same id arrives again on a retry — skip ones you have handled.

Payload fields
Field	Type	What it is
idrequired	string	Event id. The same on every retry: use it to skip duplicates.pattern `^evt_[0-9A-HJKMNP-TV-Z]{26}$`
typerequired	string	Event type.always `contact.group.added`
versionrequired	string	Payload version.always `1`
api_versionrequired	string	The endpoint's API version.
occurred_atrequired	string	When it happened.date-time
company_idrequired	integer	Your workspace id.
datarequired	object
contactrequired	object
idrequired	integer	Id.
namerequired	string or null	Name.
grouprequired	object
idrequired	integer	Id.
namerequired	string or null	Name.

Example

{
  "id": "evt_01J8Z7BZQ4F6G8J2K5N7Q9S1VC",
  "type": "contact.group.added",
  "version": "1",
  "api_version": "2026-10-01",
  "occurred_at": "2026-09-24T09:20:00Z",
  "company_id": 1001,
  "data": {
    "contact": {
      "id": 48213,
      "name": "Jane Doe"
    },
    "group": {
      "id": 5,
      "name": "Newsletter"
    }
  }
}

Headers

Webhook-Signature: t=…,v1=… — how to check it
Webhook-Id (also Webhook-Event-Id): the event id, the same on every retry — skip ones you have handled
Webhook-Delivery-Id: this delivery attempt, new on every try

API calls that can cause it

Update a contact