curl --request GET \
  --url https://api.kapso.ai/platform/v1/voice_agents/{voice_agent_id}/whatsapp/phone_numbers \
  --header 'X-API-Key: <api-key>'

{
  "data": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "voice_agent_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "phone_number_id": "123456789012345",
      "is_primary": true,
      "enabled": true,
      "created_at": "2023-11-07T05:31:56Z",
      "updated_at": "2023-11-07T05:31:56Z"
    }
  ]
}