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This page showcases Mintlify’s interactive API playground wired to JSONPlaceholder. No authentication is required. You can modify inputs and send real requests live.

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Live requests (from OpenAPI)

The blocks below use the base URL https://jsonplaceholder.typicode.com from the OpenAPI spec. 
- name: List posts (limit 3)
  method: GET
  path: /posts
  query:
    _limit: 3
  headers:
    Accept: application/json

- name: Get a post by id
  method: GET
  path: /posts/1
  headers:
    Accept: application/json

- name: Create a post
  method: POST
  path: /posts
  headers:
    Content-Type: application/json
  body:
    json:
      userId: 1
      title: "Using Mintlify Try it out"
      body: "Created from the live playground."

- name: List comments for a post
  method: GET
  path: /comments
  query:
    postId: 1

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What this demo covers

  • How to connect an OpenAPI spec and let pages auto-resolve endpoints via frontmatter.
  • How to use inline request blocks to run live calls without code.
  • How to document behaviors (mocked creation, read-only dataset, query params, path params).

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Authoring and editing showcase

Use tips for best practices and pro-tips.