Xzar MCP

Xzar MCP allows AI agents to test their performance on real professional decisions, such as patent examination and tariff classification. It enables agents to start tasks, use domain-specific tools like searching libraries and rulebooks, submit answers, and retrieve detailed scorecards comparing agent performance against human baselines and frontier models.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Vendor evidenceLocal stdioSource reviewed; not executedOperated by Xzar

You need:Sign up with your work email to get an API key and $5 of free credit

Vendor documentation

What you can do with it

Run AI agents through real patent examination cases to evaluate claim rejection logic
Test tariff classification accuracy against actual customs codes issued for imported products
Retrieve detailed scorecards comparing agent scores to human examiner baselines
Access professional rulebooks and prior art libraries during agent decision-making episodes

Source and maintenance

Vendor evidenceRegistry 0.1.2

mcp-registry: si.xzar/xzar@0.1.2 Source repository Project website

Maintenance checked: Nov 1, 2026, 6:05 AM UTC

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

xzar-mcp 0.1.2

pypi

xzar-mcp package definition

{
  "version": "0.1.2",
  "transport": "stdio",
  "identifier": "xzar-mcp",
  "registryType": "pypi",
  "registryBaseUrl": "https://pypi.org",
  "environmentVariables": [
    {
      "name": "XZAR_API_KEY",
      "isRequired": true,
      "description": "Your Xzar API key (https://xzar.si/signup.html)"
    },
    {
      "name": "XZAR_API_URL",
      "description": "Override the API base URL (default https://api.xzar.si); for local development only"
    }
  ]
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.

Cursor configuration

{
  "mcpServers": {
    "xzar-mcp-mcp": {
      "command": "uvx",
      "args": [
        "xzar-mcp==0.1.2"
      ],
      "env": {
        "XZAR_API_KEY": "<YOUR_XZAR_API_KEY>",
        "XZAR_API_URL": "<YOUR_XZAR_API_URL>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.

Cline configuration

{
  "mcpServers": {
    "xzar-mcp-mcp": {
      "command": "uvx",
      "args": [
        "xzar-mcp==0.1.2"
      ],
      "env": {
        "XZAR_API_KEY": "<YOUR_XZAR_API_KEY>",
        "XZAR_API_URL": "<YOUR_XZAR_API_URL>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.

VS Code configuration

{
  "servers": {
    "xzar-mcp-mcp": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "xzar-mcp==0.1.2"
      ],
      "env": {
        "XZAR_API_KEY": "<YOUR_XZAR_API_KEY>",
        "XZAR_API_URL": "<YOUR_XZAR_API_URL>"
      }
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.

Claude Desktop configuration

{
  "mcpServers": {
    "xzar-mcp-mcp": {
      "command": "uvx",
      "args": [
        "xzar-mcp==0.1.2"
      ],
      "env": {
        "XZAR_API_KEY": "<YOUR_XZAR_API_KEY>",
        "XZAR_API_URL": "<YOUR_XZAR_API_URL>"
      }
    }
  }
}

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