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Xzar MCP Server

API key required

Crash-test your AI agent on real professional decisions, graded against what actually happened.

To add Xzar to Claude, run the install command below or copy the ready-made config for Claude Code, Claude Desktop, Cursor and VS Code further down. Restart your client after adding it and its tools show up in your next conversation. It needs 2 environment variables, listed below.

AI

Install

uvx xzar-mcp@0.1.2

Environment variables

XZAR_API_KEYSet in your MCP config
XZAR_API_URLSet in your MCP config

Install with your client

Terminal
claude mcp add xzar --env XZAR_API_KEY=<YOUR_XZAR_API_KEY> --env XZAR_API_URL=<YOUR_XZAR_API_URL> -- uvx xzar-mcp@0.1.2

Run this in a terminal to add the server to Claude Code.

What this does

Xzar exposes a set of tools to Claude over the Model Context Protocol. After you add it to claude_desktop_config.json (snippet above) and restart Claude Desktop, those tools become callable inside any conversation.

Requirements

This server needs the following environment variables to be set before it can run:

XZAR_API_KEY
XZAR_API_URL

Set these via the env object in your MCP config (see claude_desktop_config.json snippet above).

Frequently asked questions

How do I install Xzar?

Run the Claude Code command in the install section to add Xzar to Claude Code, or copy the ready-made config for your client from the install section on this page. Restart your client afterwards and the tools appear in your next conversation.

Which clients work with Xzar?

This page carries setup and config for Claude Code, Claude Desktop, Cursor and VS Code. Any other MCP client that accepts a standard server config can connect to Xzar as well.

Does Xzar need an API key?

Yes. Before it can run, set these environment variables: XZAR_API_KEY, XZAR_API_URL. They go in the env block of your MCP config.

Imported from the Official MCP Registry. The details above come from the registry entry; the maker can claim this listing to correct them, add docs, and see its traffic.

Is this your MCP server?

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Listed on clauderules.net

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