curl --request GET \
  --url https://api.heygen.com/v3/webhooks/endpoints \
  --header 'x-api-key: <api-key>'

{
  "data": [
    {
      "endpoint_id": "<string>",
      "url": "<string>",
      "status": "<string>",
      "created_at": "<string>",
      "events": [
        "avatar_video.success",
        "avatar_video.fail"
      ],
      "secret": "whsec_abc123def456"
    }
  ],
  "has_more": true,
  "next_token": "<string>"
}