Create a project label

POST/api/v2/workspaces/{slug}/project-labels/

Add a label to the workspace's project label catalog. Only workspace owners and admins can create project labels.

Names are unique in the workspace without regard to case. If the name is taken, the 409 conflict body carries the existing label's id, so an importer can use that label instead.

Path Parameters

slug:requiredstring

The workspace slug. It appears in your Plane URLs. In https://app.plane.so/my-team/projects/, the slug is my-team.

Body Parameters

name:requiredstring

Display name. Maximum 255 characters. A name already in use, in any letter case, returns 409 conflict.

color:optionalstring

Hex color used wherever the label is rendered, for example #e5484d. Maximum 255 characters. Can be empty.

description:optionalstring

Free-form note about what the label is for. Can be empty.

sort_order:optionalnumber

Ordering weight. Lower values sort first. Plane places a new label after the last one and uses your value only when the workspace has no project labels. To reposition a label, send sort_order in Update a project label.

Response shaping

fields:optionalstring

Comma-separated list of fields to return. Unrequested keys are omitted from the response, not returned as null, so absent means "not requested" and null means "actually null". id always comes back whether or not you name it.

Pass all for every requestable field. An unknown name is a 400 that lists the valid set and suggests the closest match, so a typo can't silently cost you the saving.

Requestable here: color, created_at, created_by_id, description, id, name, sort_order, updated_at, updated_by_id.

See Sparse fields.

Scopes

workspaces.project_labels:write

Errors

Status	Code	Cause
400	invalid_request	Missing name, or a field over its length limit.
401	unauthorized	Missing or invalid credentials.
402	payment_required	The feature this endpoint belongs to isn't enabled on your plan, or is switched off.
403	forbidden	Only workspace owners and admins can create project labels, or your token lacks the scope.
404	not_found	No such workspace, or it's outside your tenant.
406	not_acceptable	The Accept header asks for a representation the API can't produce.
409	conflict	A project label with this name, in any letter case, already exists. The body carries its id.
409	governance_migration_in_progress	A governance migration is running, so the workspace is read-only. Retry after it finishes.
413	payload_too_large	The request body is over the size limit.
415	unsupported_media_type	The Content-Type isn't one this endpoint accepts.
429	rate_limited	Throttled. Honor the Retry-After header before retrying.

Create a project label

curl -X POST \
  "https://api.plane.so/api/v2/workspaces/my-team/project-labels/" \
  -H "X-Api-Key: $PLANE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "name": "Customer-facing",
  "color": "#e5484d",
  "description": "Projects that ship changes customers see"
}'

import requests

response = requests.post(
    "https://api.plane.so/api/v2/workspaces/my-team/project-labels/",
    headers={"X-Api-Key": "your-api-key"},
    json={
        "name": "Customer-facing",
        "color": "#e5484d",
        "description": "Projects that ship changes customers see",
    },
)
print(response.json())

const response = await fetch("https://api.plane.so/api/v2/workspaces/my-team/project-labels/", {
  method: "POST",
  headers: {
    "X-Api-Key": "your-api-key",
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    name: "Customer-facing",
    color: "#e5484d",
    description: "Projects that ship changes customers see",
  }),
});
const data = await response.json();

Response201

{
  "id": "71c3e8a9-4d2f-4b60-9e17-5a8c0b3f2d94",
  "name": "Customer-facing",
  "description": "Projects that ship changes customers see",
  "color": "#e5484d",
  "sort_order": 85535,
  "created_at": "2026-02-03T16:45:12.904117Z",
  "updated_at": "2026-02-03T16:45:12.904117Z",
  "created_by_id": "16c61a3a-512a-48ac-b0be-b6b46fe6f430",
  "updated_by_id": null
}

Response409

{
  "type": "conflict",
  "code": "conflict",
  "detail": "A project label with this name already exists in this workspace.",
  "id": "d8a4f2c6-1e7b-4093-9c5a-6b2e0f8d3a71"
}