Create a workflow transition

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

Add a transition to a workflow. Workflow transitions define the allowed moves between workflow states, and who may approve them.

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 who may approve the transition. Replaces the current set.

rejection_state_id:optionalstring (uuid)

Id of the state a work item moves to when the transition is rejected.

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 state. The state must be on this workflow, or the request returns 404.

transition_state_id:optionalstring (uuid)

Id of the state the transition moves a work item to.

Nullable.

Response shaping

fields:optionalstring

Comma-separated list of fields to return. Fields you don't request are left out of the response instead of coming back as null. id is always included. Pass all to get every requestable field. An unknown field name returns 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"
}