JSONPlaceholder Todos API

openapi: 3.0.3
info:
  title: JSONPlaceholder REST Albums Todos API
  description: 'JSONPlaceholder is a free, no-auth fake REST API for prototyping, testing, and teaching. It exposes six relational resources — posts, comments, albums, photos, todos, and users — over standard REST routes (GET, POST, PUT, PATCH, DELETE). Write operations are simulated: the service responds as though the change succeeded, but no data is persisted on the server. The service is powered by the open-source json-server engine, also by typicode.'
  version: 1.0.0
  contact:
    name: typicode
    url: https://github.com/typicode/jsonplaceholder
  license:
    name: MIT
    url: https://github.com/typicode/jsonplaceholder/blob/master/LICENSE
  x-generated-from: documentation
  x-last-validated: '2026-05-29'
servers:
- url: https://jsonplaceholder.typicode.com
  description: Public production endpoint (no authentication required)
tags:
- name: Todos
  description: 200 sample todo items owned by users
paths:
  /todos:
    get:
      operationId: listTodos
      summary: JSONPlaceholder List Todos
      description: Returns all 200 sample todos. Supports filtering by any field via query parameters (e.g. `?userId=1&completed=true`).
      tags:
      - Todos
      parameters:
      - name: userId
        in: query
        description: Filter todos by owning user id.
        required: false
        schema:
          type: integer
        example: 1
      - name: completed
        in: query
        description: Filter todos by completion state.
        required: false
        schema:
          type: boolean
        example: false
      responses:
        '200':
          description: Array of todos.
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/Todo'
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
    post:
      operationId: createTodo
      summary: JSONPlaceholder Create Todo
      description: Creates a new todo (simulated).
      tags:
      - Todos
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/TodoInput'
      responses:
        '201':
          description: Created todo (simulated).
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Todo'
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
  /todos/{id}:
    parameters:
    - name: id
      in: path
      required: true
      description: Todo identifier (1-200).
      schema:
        type: integer
      example: 1
    get:
      operationId: getTodo
      summary: JSONPlaceholder Get Todo
      description: Returns a single todo by id.
      tags:
      - Todos
      responses:
        '200':
          description: A single todo.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Todo'
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
    put:
      operationId: replaceTodo
      summary: JSONPlaceholder Replace Todo
      description: Replaces a todo in full (simulated).
      tags:
      - Todos
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/Todo'
      responses:
        '200':
          description: Updated todo (simulated).
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Todo'
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
    patch:
      operationId: updateTodo
      summary: JSONPlaceholder Update Todo
      description: Partially updates a todo (simulated).
      tags:
      - Todos
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/TodoInput'
      responses:
        '200':
          description: Updated todo (simulated).
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Todo'
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
    delete:
      operationId: deleteTodo
      summary: JSONPlaceholder Delete Todo
      description: Deletes a todo (simulated).
      tags:
      - Todos
      responses:
        '200':
          description: Deletion accepted (simulated).
          content:
            application/json:
              schema:
                type: object
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
  /users/{id}/todos:
    parameters:
    - name: id
      in: path
      required: true
      description: User identifier.
      schema:
        type: integer
      example: 1
    get:
      operationId: listUserTodos
      summary: JSONPlaceholder List User Todos
      description: Returns all todos owned by a single user.
      tags:
      - Todos
      responses:
        '200':
          description: Array of todos for the user.
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/Todo'
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
components:
  schemas:
    Todo:
      type: object
      description: A sample todo item owned by a user.
      required:
      - id
      - userId
      - title
      - completed
      properties:
        id:
          type: integer
          description: Unique todo identifier (1-200).
          example: 1
        userId:
          type: integer
          description: Identifier of the user who owns the todo.
          example: 1
        title:
          type: string
          description: Todo title.
          example: delectus aut autem
        completed:
          type: boolean
          description: Whether the todo is completed.
          example: false
    TodoInput:
      type: object
      description: Payload for creating or partially updating a todo.
      properties:
        userId:
          type: integer
          description: Identifier of the user who owns the todo.
          example: 1
        title:
          type: string
          description: Todo title.
          example: Write integration tests
        completed:
          type: boolean
          description: Whether the todo is completed.
          example: false