The Participant.Joined event is sent when a new participant joined the conference.

  "eventType": "Participant.Joined",
  "thirdPartyId": "example_thirdpartyId",
  "conference": {
    "confId": "conferenceId_UUID",
    "confAlias": "example_conference_alias"

  "region": "eu",
  "participant": {
    "userId": "userId_UUID",
    "externalId": "example_externalId",
    "externalName": "example_externalName",
    "externalPhotoUrl": "example_externalPhotoUrl"

The following table explains all fields of the webhook object:

Field nameObjectTypeMeaningExample
eventTypeRootStringThe type of the webhook event.Participant.Joined
thirdPartyIdRootStringThe app key. If you implemented a common webhook listener for multiple applications, this can help you to distinguish which application is this webhook event for.XSTXp4EsAmMrcw4g==
conference.confIdRootString in UUID formatThe identifier of the conference.a88484c6-2a47-4691-86e2-933eec80b316
conference. confAliasRootStringThe alias of the conference.virtual event 1
regionRootStringThe conference creation region. The possible values are: ca: Canada, us: United States, eu: Europe, in: India, au: Australiaeu
participant. userIdParticipantStringThe participant ID generated by Dolby.00000000-0000-0000-0000-000000000000
participant. externalIdParticipantStringThe external ID of the participant.[email protected]
participant. externalNameParticipantStringThe external name of the participant.Jane Smith
participant. externalPhotoUrlParticipantStringThe participant's avatar URL.-

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