Tasks API: Update milestone and ordering

Endpoint#

Property	Value
Type	mutation
Method	POST
Path	/api/external/v1/tasks/update_milestone_and_ordering
Handler	OperatelyWeb.Api.Tasks.UpdateMilestoneAndOrdering

Authentication#

• Requires a valid API token.
• Requires a write-enabled token.
• Read-only tokens return 403.

Inputs#

Field	Type	Required	Nullable	Default
task_id	id primitive (encoded as string)	Yes	No	-
milestone_id	id primitive (encoded as string)	Yes	Yes	-
index	integer	Yes	No	-

Outputs#

Field	Type	Required	Nullable
task	task object	Yes	No
updated_milestones	array of milestone object	Yes	No

cURL Example#

Copied

curl --request POST \
  --url "https://app.operately.com/api/external/v1/tasks/update_milestone_and_ordering" \
  --header "Authorization: Bearer ${OPERATELY_API_TOKEN}" \
  --header "Content-Type: application/json" \
  --data '{"index":123, "milestone_id":"value", "task_id":"value"}'

Response Example#

{
  "task": {
    "__typename": "value",
    "assignees": [
      "<person>"
    ],
    "available_statuses": [
      "<task_status>"
    ],
    "closed_at": "2026-01-01T09:30:00Z",
    "comments_count": 123,
    "creator": "<person>",
    "description": "value",
    "due_date": "<contextual_date>",
    "id": "value",
    "inserted_at": "2026-01-01",
    "milestone": "<milestone>",
    "name": "value",
    "permissions": "<project_permissions>",
    "priority": "value",
    "project": "<project>",
    "project_space": "<space>",
    "reminders": [
      "<task_reminder>"
    ],
    "size": "value",
    "space": "<space>",
    "status": "<task_status>",
    "subscription_list": "<subscription_list>",
    "type": "space",
    "updated_at": "2026-01-01",
    "url": "value"
  },
  "updated_milestones": [
    {
      "__typename": "value",
      "available_statuses": [
        "<task_status>"
      ],
      "comments": [
        "<milestone_comment>"
      ],
      "comments_count": 123,
      "completed_at": "2026-01-01",
      "creator": "<person>",
      "description": "value",
      "id": "value",
      "inserted_at": "2026-01-01",
      "permissions": "<project_permissions>",
      "project": "<project>",
      "space": "<space>",
      "status": "pending",
      "subscription_list": "<subscription_list>",
      "tasks_kanban_state": "value",
      "tasks_ordering_state": [
        "value"
      ],
      "timeframe": "<timeframe>",
      "title": "value",
      "url": "value"
    }
  ]
}