| delete | POST | mutation | /api/external/v1/project_milestones/delete |
| list_tasks | GET | query | /api/external/v1/project_milestones/list_tasks |
| update_description | POST | mutation | /api/external/v1/project_milestones/update_description |
| update_due_date | POST | mutation | /api/external/v1/project_milestones/update_due_date |
| update_kanban | POST | mutation | /api/external/v1/project_milestones/update_kanban |
| update_ordering | POST | mutation | /api/external/v1/project_milestones/update_ordering |
| update_title | POST | mutation | /api/external/v1/project_milestones/update_title |
