curl --request GET \
  --url https://api.swarmd.ai/relay/v1/agents/{agentId}/a2a/0.3.0/tasks/{taskId}/pushNotificationConfigs/{configId} \
  --header 'Authorization: Bearer <token>'

{
  "configId": "<string>",
  "taskId": "<string>",
  "url": "<string>",
  "headers": {},
  "events": [
    "<string>"
  ]
}