• DATA
  • LOGIC
  • USER
  • HUMAN

How to verify data filtering logic with your AI

Connect JSONPlaceholder once to give your agent access to placeholder datasets. From there, you can test how well it handles specific ID-based queries.

Ask AI about this page

Short answer

How can I check if my AI filters data correctly?

You can use this MCP to provide your agent with real datasets to query. By asking it to find specific items by ID, you'll see if its filtering logic holds up. This allows you to confirm it can isolate the right records without manual checking.

Validation outcomes

What you'll confirm

These are the specific results you get from testing your agent's logic.

DATA

Filtered datasets

The AI pulls specific records based on your ID constraints. You get a clean subset of data to inspect.

LOGIC

Filtering accuracy

You'll see if the agent correctly ignores irrelevant entries. This proves it can follow strict ID parameters.

USER

User-specific views

The agent isolates data tied to specific users. This confirms it understands relational links between entities.

HUMAN

Manual audit

You review the final list to ensure no extra data leaked through. This is your final check on the agent's precision.

The workflow

What your AI does when the request arrives.

The agent uses specific tools to fetch and narrow down the data you're testing.

  1. Fetch user list

    The agent retrieves the full list of users to establish a baseline for ID-based filtering.

    list_users

  2. Retrieve posts

    It pulls the available posts to prepare for filtering by specific post IDs.

    list_posts

  3. Isolate todos

    The agent narrows down the task list to find only the items belonging to a specific user.

    list_todos

  4. Filter comments

    It grabs comments and applies logic to match them to a specific post ID.

    list_comments

Try it

Copy these to start.

Use these prompts to begin your testing immediately.

Starting points

Swap out the specific user or post IDs with the ones you want to test.

JSONPlaceholder Connector

You're all set. Choose your MCP client and follow the setup instructions.

Connector linkhttps://edge.vinkius.com/vk_preview_ohXeJdyomPPxcuW3YXJrFT1qXBIHrPlFiE1K9RoA/mcp

Claude Desktop

Follow the steps below to connect in seconds.

  1. 1In Claude Desktop, open Settings → Connectors.
  2. 2Click “Add custom connector” and paste the connector link above as the remote MCP server URL.
  3. 3Click Add and start a new chat — JSONPlaceholder capabilities are ready to use.
Configuration · claude_desktop_config.jsonCopy
{
  "mcpServers": {
    "jsonplaceholder-mcp": {
      "url": "https://edge.vinkius.com/vk_preview_ohXeJdyomPPxcuW3YXJrFT1qXBIHrPlFiE1K9RoA/mcp"
    }
  }
}
Copy into chat04

  • List all todos for user ID 1 and tell me how many there are.

  • Find all comments associated with post ID 5.

  • Show me all posts created by user ID 2.

  • Check if there are any todos for user ID 3 that are not completed.

  • Claude
  • ChatGPT
  • Cursor
  • VS Code
  • Windsurf
  • Claude Code
  • JetBrains
  • Cline

Start here

Connect JSONPlaceholder once, then ask.

One connection gives your agent access to the full dataset. You can find the full setup guide on the Connector page.

Connect JSONPlaceholder to your AI

FAQ

How this task behaves

  • 01

    Can the AI change the data in JSONPlaceholder?

    No. The tools only allow the agent to read and list existing data.

  • 02

    Can I use this to create new users?

    No. This MCP is limited to retrieving data through the provided list tools.

  • 03

    How does the AI know which user I'm talking about?

    The agent uses the IDs you provide in your prompt to call the specific tools.

  • 04

    Does the AI store the data it finds?

    No. The agent processes the data in the moment to answer your question.

  • 05

    Can I filter by something other than ID?

    No. The current tools are designed to fetch data based on the IDs available in the dataset.

  • More questions about JSONPlaceholder? The Connector page answers them. See everything the JSONPlaceholder Connector can do

Connect JSONPlaceholder to Claude, Cursor, ChatGPT & more