Windmill Flows API

openapi: 3.2.0
info:
  title: Windmill Apps Flows API
  description: 'Windmill is an open-source developer platform that turns scripts into internal tools, UIs, workflows, and cron jobs, executed by a distributed worker fleet. This is a representative subset of the Windmill REST API - the same surface used by the Windmill CLI and web UI. The authoritative, machine-generated specification is served live at GET /openapi.yaml (see https://app.windmill.dev/openapi.html); this document curates the most commonly used, stable endpoints for discovery.

    Almost every resource is scoped under a workspace at the /w/{workspace} path prefix. Windmill runs as Windmill Cloud (base https://app.windmill.dev/api) or self-hosted (base http(s)://your-host/api). Requests are authenticated with a Bearer token created in the Windmill UI under account settings, or with a session cookie.'
  version: 1.745.0
  contact:
    name: Windmill
    url: https://www.windmill.dev
  license:
    name: AGPL-3.0 (community) / Windmill Enterprise License
    url: https://github.com/windmill-labs/windmill/blob/main/LICENSE
servers:
- url: https://app.windmill.dev/api
  description: Windmill Cloud
- url: http://localhost:8000/api
  description: Local development (self-hosted)
security:
- bearerAuth: []
- cookieAuth: []
tags:
- name: Flows
  description: DAG workflows composing scripts with branches, loops, and approvals.
paths:
  /w/{workspace}/flows/list:
    parameters:
    - $ref: '#/components/parameters/Workspace'
    get:
      operationId: listFlows
      tags:
      - Flows
      summary: List flows
      description: Lists flows in a workspace.
      responses:
        '200':
          description: A list of flows.
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/Flow'
        '401':
          $ref: '#/components/responses/Unauthorized'
  /w/{workspace}/flows/create:
    parameters:
    - $ref: '#/components/parameters/Workspace'
    post:
      operationId: createFlow
      tags:
      - Flows
      summary: Create a flow
      description: Creates a new flow.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/Flow'
      responses:
        '201':
          description: Created flow path.
        '401':
          $ref: '#/components/responses/Unauthorized'
  /w/{workspace}/flows/get/p/{path}:
    parameters:
    - $ref: '#/components/parameters/Workspace'
    - $ref: '#/components/parameters/Path'
    get:
      operationId: getFlowByPath
      tags:
      - Flows
      summary: Get a flow by path
      description: Retrieves a flow by its path.
      responses:
        '200':
          description: The requested flow.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Flow'
        '404':
          $ref: '#/components/responses/NotFound'
components:
  responses:
    NotFound:
      description: The requested resource was not found.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    Unauthorized:
      description: Missing or invalid Bearer token or session cookie.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  parameters:
    Workspace:
      name: workspace
      in: path
      required: true
      description: The workspace id (tenant) the resource belongs to.
      schema:
        type: string
    Path:
      name: path
      in: path
      required: true
      description: The runnable/resource path (e.g. u/username/my_script or f/folder/name).
      schema:
        type: string
  schemas:
    Error:
      type: object
      properties:
        error:
          type: object
          properties:
            name:
              type: string
            message:
              type: string
    Flow:
      type: object
      properties:
        path:
          type: string
        summary:
          type: string
        description:
          type: string
        value:
          type: object
          description: The flow definition (modules, branches, loops).
          additionalProperties: true
        schema:
          type: object
          additionalProperties: true
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: 'Bearer token created in the Windmill UI under account settings, passed as Authorization: Bearer YOUR_TOKEN.'
    cookieAuth:
      type: apiKey
      in: cookie
      name: token
      description: Session cookie set by the Windmill web UI after login.