JSONPlaceholder Comments API

openapi: 3.0.3
info:
  title: JSONPlaceholder REST Albums Comments 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: Comments
  description: 500 sample comments belonging to posts
paths:
  /posts/{id}/comments:
    parameters:
    - name: id
      in: path
      required: true
      description: Post identifier.
      schema:
        type: integer
      example: 1
    get:
      operationId: listPostComments
      summary: JSONPlaceholder List Post Comments
      description: Returns all comments belonging to a single post.
      tags:
      - Comments
      responses:
        '200':
          description: Array of comments for the post.
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/Comment'
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
  /comments:
    get:
      operationId: listComments
      summary: JSONPlaceholder List Comments
      description: Returns all 500 sample comments. Supports filtering by any field via query parameters (e.g. `?postId=1`).
      tags:
      - Comments
      parameters:
      - name: postId
        in: query
        description: Filter comments by post id.
        required: false
        schema:
          type: integer
        example: 1
      responses:
        '200':
          description: Array of comments.
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/Comment'
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
    post:
      operationId: createComment
      summary: JSONPlaceholder Create Comment
      description: Creates a new comment. Returns the created comment with a generated id but no data is persisted.
      tags:
      - Comments
      requestBody:
        required: true
        description: New comment payload.
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CommentInput'
      responses:
        '201':
          description: Created comment (simulated).
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Comment'
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
  /comments/{id}:
    parameters:
    - name: id
      in: path
      required: true
      description: Comment identifier (1-500).
      schema:
        type: integer
      example: 1
    get:
      operationId: getComment
      summary: JSONPlaceholder Get Comment
      description: Returns a single comment by id.
      tags:
      - Comments
      responses:
        '200':
          description: A single comment.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Comment'
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
    put:
      operationId: replaceComment
      summary: JSONPlaceholder Replace Comment
      description: Replaces a comment in full (simulated).
      tags:
      - Comments
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/Comment'
      responses:
        '200':
          description: Updated comment (simulated).
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Comment'
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
    patch:
      operationId: updateComment
      summary: JSONPlaceholder Update Comment
      description: Partially updates a comment (simulated).
      tags:
      - Comments
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CommentInput'
      responses:
        '200':
          description: Updated comment (simulated).
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Comment'
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
    delete:
      operationId: deleteComment
      summary: JSONPlaceholder Delete Comment
      description: Deletes a comment (simulated).
      tags:
      - Comments
      responses:
        '200':
          description: Deletion accepted (simulated).
          content:
            application/json:
              schema:
                type: object
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
components:
  schemas:
    CommentInput:
      type: object
      description: Payload for creating or partially updating a comment.
      properties:
        postId:
          type: integer
          description: Identifier of the post being commented on.
          example: 1
        name:
          type: string
          description: Display name / subject of the comment.
          example: Great post
        email:
          type: string
          format: email
          description: Email address of the commenter.
          example: reader@example.com
        body:
          type: string
          description: Comment body text.
          example: Thanks for writing this.
    Comment:
      type: object
      description: A sample comment attached to a post.
      required:
      - id
      - postId
      - name
      - email
      - body
      properties:
        id:
          type: integer
          description: Unique comment identifier (1-500).
          example: 1
        postId:
          type: integer
          description: Identifier of the post this comment belongs to.
          example: 1
        name:
          type: string
          description: Display name / subject of the comment.
          example: id labore ex et quam laborum
        email:
          type: string
          format: email
          description: Email address of the commenter.
          example: Eliseo@gardner.biz
        body:
          type: string
          description: Comment body text.
          example: laudantium enim quasi est quidem magnam voluptate ipsam eos tempora quo necessitatibus