curl --request GET \
  --url https://api.example.com/api/agents/{agent_id}/call_stats

[
  {
    "call_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "call_agent_id": 123,
    "stt_data": [],
    "llm_data": [],
    "tts_data": [],
    "call_transcription": [],
    "call_recording_url": "<string>",
    "from_number": "<string>",
    "to_number": "<string>",
    "recording_id": "<string>",
    "call_context": {},
    "call_status": "ANSWERED",
    "call_duration": 123,
    "billed_duration": 123,
    "initiation_time": "<string>",
    "answer_time": "<string>",
    "end_time": "<string>",
    "hangup_cause_name": "<string>",
    "hangup_source": "<string>",
    "call_direction": "inbound",
    "task_id": 123,
    "call_state_changes": [],
    "call_triggered": true,
    "call_quality": {},
    "call_insights": {},
    "call_timeline": [
      {}
    ],
    "tool_data": [
      {}
    ],
    "audio_config": {},
    "org_id": 123
  }
]