community.challenge.joined

Generated from COPE public event contracts. Do not edit this page by hand.

Fires when a member joins a challenge.

Delivery Contract

Field	Value
Encoding	CloudEvents 1.0 structured JSON
Delivery	At least once
Idempotency	Use the CloudEvents `source` + `id` tuple, or COPE `idempotency_key` when available.
Source	`cope.community`
Subject pattern	`challenge:<identifier>`
Category	Gamification
Availability	Available in the public webhook reference.
Schema title	community.challenge.joined v1 payload
Schema ID	`https://schemas.cope.com/events/community.challenge.joined/v1`

Payload Fields

Field	Required	Type	Allowed Values	Description
`challenge_id`	yes	`string`	-	-
`community_id`	yes	`string`	-	-
`user_id`	yes	`string`	-	-

Example CloudEvent

{
  "data": {
    "challenge_id": "example_id",
    "community_id": "example_id",
    "user_id": "example_id"
  },
  "datacontenttype": "application/json",
  "dataschema": "https://schemas.cope.com/events/community.challenge.joined/v1",
  "id": "community.challenge.joined:example",
  "idempotency_key": "community.challenge.joined:example",
  "source": "cope.community",
  "specversion": "1.0",
  "subject": "challenge:example",
  "time": "2026-05-05T12:00:00.000Z",
  "type": "community.challenge.joined"
}

Compatibility

Fields may be added within the same major version. Removing or changing the meaning of a documented field requires a new event version.

​community.challenge.joined

​Delivery Contract

​Payload Fields

​Example CloudEvent

​Compatibility

community.challenge.joined

Delivery Contract

Payload Fields

Example CloudEvent

Compatibility