Get agent instance detail

curl --request POST \
  --url https://api.svantic.com/agents/get_by_id \
  --header 'Content-Type: application/json' \
  --data '
{
  "instance_id": "string"
}
'

{
  "ok": true,
  "agent": {
    "instance_id": "string",
    "agent_type": "string",
    "public_url": "https://mesh.example.com/send",
    "deployment_mode": "hosted",
    "tenant_id": "string",
    "mesh_id": "string",
    "status": "available",
    "current_sessions": 0,
    "max_concurrent_sessions": 0,
    "consecutive_failures": 0,
    "last_seen": "2026-03-31T12:00:00.000Z",
    "registered_at": "2026-03-31T12:00:00.000Z",
    "agent_version": "string",
    "provider_organization": "string",
    "provider_url": "string",
    "agent_card": {
      "example_key": "example_value"
    },
    "context": {
      "example_key": "example_value"
    }
  }
}