How to Use the JSONPlaceholder MCP in Claude

Q: Can I use JSONPlaceholder in Claude Desktop for testing writes?

Yes, you can use tools like updatepost or deletepost to confirm how your application logic handles different server responses. It works exactly like a standard REST endpoint.

Q: How do I list users from JSONPlaceholder using Claude Desktop?

Just ask your agent to list users. It calls listusers and returns the full array of fake account data to your chat window.

Test your frontend logic by pulling live mock data directly into Claude Desktop with this MCP server.

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Connect JSONPlaceholder MCP to Claude Desktop

Create your Vinkius account to connect JSONPlaceholder to Claude Desktop and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

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Setup JSONPlaceholder with Claude Desktop

Ask AI about this MCP

ChatGPT

Claude

Perplexity

Manage mock resources in Claude Desktop

Stop hardcoding dummy data in your frontends. Use `list_posts` and `list_users` to pull real-looking entries into your chat session immediately. You can even use `create_post` or `patch_post` to simulate state changes during your development cycle.

Explore relational data structures

Need to see how your UI handles nested content? Use `get_post_comments` to fetch specific threads for any post ID you are testing. This MCP server gives you a clean way to inspect how `get_user_albums` or `get_user_todos` map back to specific users.

Verify API responses locally

Avoid the overhead of setting up a local dev server just to test basic REST interactions. Simply trigger `get_photo` or `get_album` to see the structure returned by the API. It keeps your workflow tight and focused on the code, not the infrastructure.

Setup guide

Set up JSONPlaceholder MCP in Claude Web or Desktop

1

Open Claude Settings

Go to claude.ai, click your profile icon, then navigate to Customize → Connectors.
2

Add Custom Connector

Click the "+" button and select Add custom connector. Paste your Vinkius endpoint URL: https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com. For OAuth-protected servers, expand Advanced settings to add credentials.
3

Start a conversation

Open a new chat. The JSONPlaceholder MCP tools are available immediately — no restart needed.

Endpoint URL

https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp

No configuration file needed — paste the URL directly in the Claude web interface.

Available on Free (1 connector), Pro, Max, Team, and Enterprise plans.

Prerequisites

Claude Desktop installed (macOS or Windows)
Active Vinkius subscription with a valid endpoint token

1

Open Claude Desktop Settings

Click the menu icon at the top-left corner, go to Settings → Developer → Edit Config. This opens claude_desktop_config.json in your default text editor.
2

Paste the JSONPlaceholder MCP configuration

Copy the JSON snippet on the right into the mcpServers object. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com.
3

Restart Claude Desktop

Close and reopen the application. Claude needs a full restart to load new MCPs — refreshing a conversation is not enough.
4

Verify the connection

Open a new conversation. Click the 🔌 icon at the bottom of the message input. You should see tools listed under jsonplaceholder-mcp.

json

{
  "mcpServers": {
    "jsonplaceholder-mcp": {
      "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    }
  }
}

Get your connection token →

Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by JSONPlaceholder. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

Why Choose Vinkius

Vinkius connects your tools to AI with real-time monitoring and automatic cost savings — all from one dashboard.

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Connect your favorite tools to your AI and see exactly what's happening — every request, every response, in real time.

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60%

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Vinkius compresses data between your apps and your AI automatically. Lower bills every month — no configuration required.

Single dashboard

One

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Every tool your AI connects to, managed from a single screen. One account, complete control.

Common questions about JSONPlaceholder MCP in Claude Desktop

Open your configuration file located in the Claude application support folder. Add the server details under the mcpServers key, save, and restart the app to see the tools.

Yes, you can use tools like `update_post` or `delete_post` to confirm how your application logic handles different server responses. It works exactly like a standard REST endpoint.

No. This server only interacts with public, fake data provided by the JSONPlaceholder service. Your local files and personal keys remain untouched by these operations.

Just ask your agent to list users. It calls `list_users` and returns the full array of fake account data to your chat window.

The tool sends a DELETE request to the mock endpoint. You will get a status confirmation back in the chat interface.

Use it with your favorite AI tools

Connect this server to Cursor, Claude, VS Code, and more.

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