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How to integrate JSONPlaceholder using MCP

Free fake REST API for testing. This guide creates an MCP server from Arthur's JSONPlaceholder template — tools preconfigured against https://jsonplaceholder.typicode.com — and finishes by sharing the server's MCP swagger documentation.

Steps

  1. Go to the REST API Templates gallery and search for JSONPlaceholder.

    Open the REST API template gallery

    Search the gallery for the JSONPlaceholder integration

  2. Click Use template on the JSONPlaceholder card to open the server-creation dialog.

    Open the JSONPlaceholder template with its preconfigured tools

  3. Review the server name — the dialog lists every tool that will be created.

    Name the server after the integration it provides

  4. Click Create server. Arthur creates the server, applies the authentication, and generates all the tools.

    Create the JSONPlaceholder server with its preconfigured tools

  5. Open the server's Tools tab to review the generated tools.

    Review the tools generated from the JSONPlaceholder template

  6. Open the server's Connect section and click Share the MCP swagger documentation — Arthur generates the public documentation link and QR code for this server.

    Open the server's Connect section, where the MCP endpoint and its documentation live

    Open the MCP swagger documentation share panel

    Show the generated swagger documentation link and QR code for this server

Confirm it worked

The server appears with 6 preconfigured tool(s): list_posts, get_post, create_post, list_users, get_user, list_todos. The Connect section offers the MCP swagger documentation — a shareable page with setup instructions for any AI client.

Good to know

  • A free online REST API ideal for quick prototyping. No setup or credentials needed — great for testing your AI workflow before connecting a real API.
  • No authentication required — the server is ready to use immediately.
  • Official API documentation: https://jsonplaceholder.typicode.com
  • Editing a tool later never changes the template — templates are starting points, and the server is fully yours after creation.

Related

Tutorial video