JSONPlaceholder · Capability
JSONPlaceholder REST API — Posts

Posts — the canonical JSONPlaceholder blog-post surface. 7 operations. Lead operation: List Posts. Self-contained Naftiko capability covering one JSONPlaceholder business surface.
Run with Naftiko JSONPlaceholderPostsFake REST
What You Can Do

GET
Listposts — List all posts.
/v1/posts
POST
Createpost — Create a new post (simulated).
/v1/posts
GET
Getpost — Get a single post by id.
/v1/posts/{id}
PUT
Replacepost — Replace a post in full (simulated).
/v1/posts/{id}
PATCH
Updatepost — Partially update a post (simulated).
/v1/posts/{id}
DELETE
Deletepost — Delete a post (simulated).
/v1/posts/{id}
GET
Listpostcomments — List all comments belonging to a single post.
/v1/posts/{id}/comments
MCP Tools

list-posts

List all posts, optionally filtered by userId or id.
read-only idempotent
create-post

Create a new post (simulated, not persisted).
get-post

Get a single post by id.
read-only idempotent
replace-post

Replace a post in full (simulated).
idempotent
update-post

Partially update a post (simulated).
idempotent
delete-post

Delete a post (simulated).
idempotent
list-post-comments

List all comments belonging to a single post.
read-only idempotent
Capability Spec

naftiko: "1.0.0-alpha2"

info:
  label: "JSONPlaceholder REST API — Posts"
  description: >-
    Posts — the canonical JSONPlaceholder blog-post surface. 7 operations.
    Lead operation: List Posts. Self-contained Naftiko capability covering one
    JSONPlaceholder business surface.
  tags:
    - JSONPlaceholder
    - Posts
    - Fake REST
  created: "2026-05-29"
  modified: "2026-05-29"

binds:
  - namespace: env
    keys:
      JSONPLACEHOLDER_BASE_URL: JSONPLACEHOLDER_BASE_URL

capability:

  consumes:
    - type: http
      namespace: "jsonplaceholder-posts"
      baseUri: "https://jsonplaceholder.typicode.com"
      description: "JSONPlaceholder Posts surface. No authentication required."
      resources:
        - name: "posts"
          path: "/posts"
          operations:
            - name: "listPosts"
              method: GET
              description: "List all 100 posts; optional query filters."
              inputParameters:
                - name: "userId"
                  in: query
                  type: integer
                  required: false
                  description: "Filter posts by owning user id."
                - name: "id"
                  in: query
                  type: integer
                  required: false
                  description: "Filter posts by post id."
              outputRawFormat: json
              outputParameters:
                - name: result
                  type: object
                  value: "$."
            - name: "createPost"
              method: POST
              description: "Create a new post (simulated, not persisted)."
              inputParameters:
                - name: "body"
                  in: body
                  type: object
                  required: true
                  description: "Post payload (title, body, userId)."
              outputRawFormat: json
              outputParameters:
                - name: result
                  type: object
                  value: "$."
        - name: "post"
          path: "/posts/{id}"
          operations:
            - name: "getPost"
              method: GET
              description: "Get a single post by id."
              inputParameters:
                - name: "id"
                  in: path
                  type: integer
                  required: true
                  description: "Post identifier (1-100)."
              outputRawFormat: json
              outputParameters:
                - name: result
                  type: object
                  value: "$."
            - name: "replacePost"
              method: PUT
              description: "Replace a post in full (simulated)."
              inputParameters:
                - name: "id"
                  in: path
                  type: integer
                  required: true
                  description: "Post identifier."
                - name: "body"
                  in: body
                  type: object
                  required: true
                  description: "Full replacement payload."
              outputRawFormat: json
              outputParameters:
                - name: result
                  type: object
                  value: "$."
            - name: "updatePost"
              method: PATCH
              description: "Partially update a post (simulated)."
              inputParameters:
                - name: "id"
                  in: path
                  type: integer
                  required: true
                  description: "Post identifier."
                - name: "body"
                  in: body
                  type: object
                  required: true
                  description: "Partial update payload."
              outputRawFormat: json
              outputParameters:
                - name: result
                  type: object
                  value: "$."
            - name: "deletePost"
              method: DELETE
              description: "Delete a post (simulated)."
              inputParameters:
                - name: "id"
                  in: path
                  type: integer
                  required: true
                  description: "Post identifier."
              outputRawFormat: json
              outputParameters:
                - name: result
                  type: object
                  value: "$."
        - name: "post-comments"
          path: "/posts/{id}/comments"
          operations:
            - name: "listPostComments"
              method: GET
              description: "List all comments belonging to a single post."
              inputParameters:
                - name: "id"
                  in: path
                  type: integer
                  required: true
                  description: "Post identifier."
              outputRawFormat: json
              outputParameters:
                - name: result
                  type: object
                  value: "$."

  exposes:
    - type: rest
      namespace: "jsonplaceholder-posts-rest"
      port: 8080
      description: "REST adapter for JSONPlaceholder Posts. One resource per consumed operation, prefixed with /v1."
      resources:
        - path: "/v1/posts"
          name: "posts"
          description: "List and create posts."
          operations:
            - method: GET
              name: "listPosts"
              description: "List all posts."
              call: "jsonplaceholder-posts.listPosts"
              with:
                "userId": "rest.userId"
                "id": "rest.id"
              outputParameters:
                - type: object
                  mapping: "$."
            - method: POST
              name: "createPost"
              description: "Create a new post (simulated)."
              call: "jsonplaceholder-posts.createPost"
              with:
                "body": "rest.body"
              outputParameters:
                - type: object
                  mapping: "$."
        - path: "/v1/posts/{id}"
          name: "post"
          description: "Read, replace, update, or delete a single post."
          operations:
            - method: GET
              name: "getPost"
              description: "Get a single post by id."
              call: "jsonplaceholder-posts.getPost"
              with:
                "id": "rest.id"
              outputParameters:
                - type: object
                  mapping: "$."
            - method: PUT
              name: "replacePost"
              description: "Replace a post in full (simulated)."
              call: "jsonplaceholder-posts.replacePost"
              with:
                "id": "rest.id"
                "body": "rest.body"
              outputParameters:
                - type: object
                  mapping: "$."
            - method: PATCH
              name: "updatePost"
              description: "Partially update a post (simulated)."
              call: "jsonplaceholder-posts.updatePost"
              with:
                "id": "rest.id"
                "body": "rest.body"
              outputParameters:
                - type: object
                  mapping: "$."
            - method: DELETE
              name: "deletePost"
              description: "Delete a post (simulated)."
              call: "jsonplaceholder-posts.deletePost"
              with:
                "id": "rest.id"
              outputParameters:
                - type: object
                  mapping: "$."
        - path: "/v1/posts/{id}/comments"
          name: "post-comments"
          description: "List comments for a single post."
          operations:
            - method: GET
              name: "listPostComments"
              description: "List all comments belonging to a single post."
              call: "jsonplaceholder-posts.listPostComments"
              with:
                "id": "rest.id"
              outputParameters:
                - type: object
                  mapping: "$."

    - type: mcp
      namespace: "jsonplaceholder-posts-mcp"
      port: 9090
      transport: http
      description: "MCP adapter for JSONPlaceholder Posts. One verb-noun tool per consumed operation."
      tools:
        - name: "list-posts"
          description: "List all posts, optionally filtered by userId or id."
          hints:
            readOnly: true
            destructive: false
            idempotent: true
          call: "jsonplaceholder-posts.listPosts"
          with:
            "userId": "tools.userId"
            "id": "tools.id"
          outputParameters:
            - type: object
              mapping: "$."
        - name: "create-post"
          description: "Create a new post (simulated, not persisted)."
          hints:
            readOnly: false
            destructive: false
            idempotent: false
          call: "jsonplaceholder-posts.createPost"
          with:
            "body": "tools.body"
          outputParameters:
            - type: object
              mapping: "$."
        - name: "get-post"
          description: "Get a single post by id."
          hints:
            readOnly: true
            destructive: false
            idempotent: true
          call: "jsonplaceholder-posts.getPost"
          with:
            "id": "tools.id"
          outputParameters:
            - type: object
              mapping: "$."
        - name: "replace-post"
          description: "Replace a post in full (simulated)."
          hints:
            readOnly: false
            destructive: false
            idempotent: true
          call: "jsonplaceholder-posts.replacePost"
          with:
            "id": "tools.id"
            "body": "tools.body"
          outputParameters:
            - type: object
              mapping: "$."
        - name: "update-post"
          description: "Partially update a post (simulated)."
          hints:
            readOnly: false
            destructive: false
            idempotent: true
          call: "jsonplaceholder-posts.updatePost"
          with:
            "id": "tools.id"
            "body": "tools.body"
          outputParameters:
            - type: object
              mapping: "$."
        - name: "delete-post"
          description: "Delete a post (simulated)."
          hints:
            readOnly: false
            destructive: true
            idempotent: true
          call: "jsonplaceholder-posts.deletePost"
          with:
            "id": "tools.id"
          outputParameters:
            - type: object
              mapping: "$."
        - name: "list-post-comments"
          description: "List all comments belonging to a single post."
          hints:
            readOnly: true
            destructive: false
            idempotent: true
          call: "jsonplaceholder-posts.listPostComments"
          with:
            "id": "tools.id"
          outputParameters:
            - type: object
              mapping: "$."