How to Use the JSONPlaceholder MCP in Claude Code

Q: How do I use Claude Code to get all posts from JSONPlaceholder and save them to a file?

It's a one-liner. Just run claude mcp call jsonplaceholder-mcp listposts > posts.json. Claude Code handles the connection and outputs clean JSON, ready for redirection.

Q: What's the command to connect Claude Code to the JSONPlaceholder MCP server?

First, add the server with claude mcp add --transport http jsonplaceholder-mcp -- . Then you can use claude mcp call to interact with it.

Pipe mock API data from JSONPlaceholder directly into your shell scripts and CI/CD jobs with Claude Code.

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Create your Vinkius account to connect JSONPlaceholder to Claude Code 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 Code

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Integrate Mock Data in Shell Scripts

This isn't just about calling an API; it's about making mock data a native part of your terminal workflow. Use Claude Code to fetch all users and pipe them straight into another tool for processing. The command is simple: `claude mcp call jsonplaceholder-mcp list_users | jq '.[] | .name'`. You get a clean list of names, ready for scripting. No `curl` wrestling, no parsing messy headers.

Automate Integration Tests with Claude Code

Add this MCP server to your CI/CD pipeline to run true integration tests against a live, stateful API. Your test script can use Claude Code to call `create_post` to seed the environment before your tests run. After the test suite finishes, a final step calls `delete_post` to ensure a clean state for the next run. This makes your integration tests reliable and independent, just by adding a few lines to your YAML file.

Build Headless Monitoring Scripts

You can use Claude Code and this server to write simple health checks for services that rely on a similar REST API structure. A cron job can run a command like `claude mcp call jsonplaceholder-mcp get_post --id=1` every minute. If the command fails or the output JSON doesn't match the expected schema, you can trigger an alert. It's a quick way to build confidence in your dependencies without a complex monitoring setup.

Setup guide

Set up JSONPlaceholder MCP in Claude Code

Prerequisites

Claude Code CLI installed (npm install -g @anthropic-ai/claude-code)
Active Vinkius subscription with a valid endpoint token

1

Run the add command

Open your terminal and run the command shown on the right. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com. Use --scope user to make it available across all projects.
2

Verify the connection

Start a Claude Code session and type /mcp to list connected servers. You should see jsonplaceholder-mcp with a green status indicator.
3

Start using tools

Ask Claude Code something like "Check my latest JSONPlaceholder transactions." It will automatically discover and invoke the available JSONPlaceholder tools.

Terminal

claude mcp add --transport http jsonplaceholder-mcp https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp

Get your connection token →

Prerequisites

Claude Code CLI installed
Active Vinkius subscription with a valid endpoint token

1

Open the config file

Create or edit .mcp.json in your project root for project-level scope, or ~/.claude.json for user-level scope.
2

Add the JSONPlaceholder MCP

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

Restart Claude Code

Start a new Claude Code session. Type /mcp to confirm the server is connected. The tools will be automatically available in your conversation.

.mcp.json

{
  "mcpServers": {
    "jsonplaceholder-mcp": {
      "type": "url",
      "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.

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Common questions about JSONPlaceholder MCP in Claude Code

It's a one-liner. Just run `claude mcp call jsonplaceholder-mcp list_posts > posts.json`. Claude Code handles the connection and outputs clean JSON, ready for redirection.

Absolutely. Install Claude Code in your workflow, connect it to the JSONPlaceholder MCP server, and call tools like `create_post` and `delete_post` directly from your test script steps.

First, add the server with `claude mcp add --transport http jsonplaceholder-mcp -- `. Then you can use `claude mcp call` to interact with it.

Yes, the tools support filtering where the original API does. Use a command like `claude mcp call jsonplaceholder-mcp list_posts --userId=1` to get just the posts for that user.

Only the parameters for the tool you're calling, like a post ID or user ID. The server itself only ever sees fake data like posts, todos, and user info. Your connection is secured with a Vinkius token and runs in a totally ephemeral compute instance.

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