Create a workflow transition

POST/api/v2/workspaces/{slug}/projects/{project_id}/workflows/{workflow_id}/state-transitions/

Workflow transitions define the legal moves between workflow states, and who may approve them. Create a workflow transition.

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.

project_id:requiredstring

The project the resource belongs to. Accepts the project UUID or its bare identifier, for example ENG.

workflow_id:requiredstring (uuid)

The workflow the resource belongs to.

Body Parameters

member_ids:optionalarray of string (uuid)

Ids of the members to associate. Replaces the current set.

rejection_state_id:optionalstring (uuid)

Id of the related rejection state.

Nullable.

required_approvals:optionalinteger

How many approvals a transition needs before it may run.

Nullable.

state_id:requiredstring (uuid)

Project state id of the source. The state must be on this workflow, or the request returns 404.

transition_state_id:optionalstring (uuid)

Id of the related transition state.

Nullable.

Response shaping

fields:optionalstring

Comma-separated list of fields to return. Unrequested keys are omitted, not returned as null. id always comes back. Pass all for every requestable field. An unknown name is a 400. See Sparse fields.

Requestable here: created_at, created_by_id, id, member_ids, rejection_state_id, required_approvals, transition_state_id, updated_at, updated_by_id, workflow_state_id.

Scopes

projects.workflows:write

Errors

Status	Code	Cause
400	invalid_request	state_id is missing, the source is an approval state that already has a transition or your plan doesn't include approvals, or a field failed validation.
401	unauthorized	Missing or invalid credentials.
402	payment_required	The Workflows feature isn't on your plan, or is turned off.
403	forbidden	Your role or token scope doesn't allow this.
404	not_found	No such resource, or it's outside your tenant.
404	not_found	Workflow state not found. The state_id state isn't on this workflow.
406	not_acceptable	The Accept header asks for a representation the API can't produce.
409	conflict	A transition from this state to this target already exists.
409	governance_migration_in_progress	A governance migration is running in this workspace, so writes are paused. 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 workflow transition

curl -X POST \
  "https://api.plane.so/api/v2/workspaces/my-team/projects/4af68566-94a4-4eb3-94aa-50dc9427067b/workflows/9c1f0b3d-6d2e-4c9a-8b41-2f7e5a0d6c88/state-transitions/" \
  -H "X-Api-Key: $PLANE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "state_id": "2b7d4e90-1c3a-4f68-9e52-8a0f6d3b7c14",
  "transition_state_id": "f960d3c2-8524-4a41-b8eb-055ce4be2a7f",
  "member_ids": ["16c61a3a-512a-48ac-b0be-b6b46fe6f430"],
  "rejection_state_id": "7e19c5a2-4d8b-4f30-a6e1-3b9c0d2f8e57",
  "required_approvals": 1
}'

import requests

response = requests.post(
    "https://api.plane.so/api/v2/workspaces/my-team/projects/4af68566-94a4-4eb3-94aa-50dc9427067b/workflows/9c1f0b3d-6d2e-4c9a-8b41-2f7e5a0d6c88/state-transitions/",
    headers={"X-Api-Key": "your-api-key"},
    json={
        "state_id": "2b7d4e90-1c3a-4f68-9e52-8a0f6d3b7c14",
        "transition_state_id": "f960d3c2-8524-4a41-b8eb-055ce4be2a7f",
        "member_ids": ["16c61a3a-512a-48ac-b0be-b6b46fe6f430"],
        "rejection_state_id": "7e19c5a2-4d8b-4f30-a6e1-3b9c0d2f8e57",
        "required_approvals": 1
    },
)
print(response.json())

const response = await fetch(
  "https://api.plane.so/api/v2/workspaces/my-team/projects/4af68566-94a4-4eb3-94aa-50dc9427067b/workflows/9c1f0b3d-6d2e-4c9a-8b41-2f7e5a0d6c88/state-transitions/",
  {
    method: "POST",
    headers: {
      "X-Api-Key": "your-api-key",
      "Content-Type": "application/json",
    },
    body: JSON.stringify({
      state_id: "2b7d4e90-1c3a-4f68-9e52-8a0f6d3b7c14",
      transition_state_id: "f960d3c2-8524-4a41-b8eb-055ce4be2a7f",
      member_ids: ["16c61a3a-512a-48ac-b0be-b6b46fe6f430"],
      rejection_state_id: "7e19c5a2-4d8b-4f30-a6e1-3b9c0d2f8e57",
      required_approvals: 1,
    }),
  },
);
const data = await response.json();

Response201

{
  "created_at": "2026-01-14T09:22:41.478363Z",
  "updated_at": "2026-01-14T09:22:41.478363Z",
  "created_by_id": "16c61a3a-512a-48ac-b0be-b6b46fe6f430",
  "updated_by_id": null,
  "id": "c41e8f27-6a93-4b05-8d1e-9f2a7c3b5e60",
  "member_ids": ["16c61a3a-512a-48ac-b0be-b6b46fe6f430"],
  "rejection_state_id": "7e19c5a2-4d8b-4f30-a6e1-3b9c0d2f8e57",
  "required_approvals": 1,
  "transition_state_id": "f960d3c2-8524-4a41-b8eb-055ce4be2a7f",
  "workflow_state_id": "b7e42a19-3c5d-4f80-9a26-8d1c0f4e7b53"
}