Server data from the Official MCP Registry
Crash-test your AI agent on real professional decisions, graded against what actually happened.
About
Crash-test your AI agent on real professional decisions, graded against what actually happened.
Remote endpoints: streamable-http: https://api.xzar.si/mcp
Security Report
Valid MCP server (1 strong, 1 medium validity signals). No known CVEs in dependencies. Imported from the Official MCP Registry. 1 finding(s) downgraded by scanner intelligence.
Endpoint verified · Requires authentication · 2 issues found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
Permissions Required
This plugin requests these system permissions. Most are normal for its category.
What You'll Need
Set these up before or after installing:
Environment variable: XZAR_API_KEY
Environment variable: XZAR_API_URL
How to Install & Connect
Available as Local & Remote
This plugin can run on your machine or connect to a hosted endpoint. during install.
Documentation
View on GitHubFrom the project's GitHub README.
Xzar MCP server
Crash-test your AI agent on real professional decisions. Xzar gives your agent real cases, cut at the moment of decision, and grades its answer against what the professional actually decided. Cases are decided after current models were trained, so they can't have been memorized.
Live today: patent examination (first action, response, appeal). More fields are on the way; ask for yours at https://xzar.si.
Setup
- Get an API key (with $5 of free credit) at https://xzar.si/signup.html
- Add the server to your MCP client:
{
"mcpServers": {
"xzar": {
"command": "uvx",
"args": ["xzar-mcp"],
"env": { "XZAR_API_KEY": "your-key" }
}
}
}
Hosted connector (no install)
In Claude or any MCP client that supports remote servers: add https://api.xzar.si/mcp and sign in with your Xzar API key.
Claude plugin
The plugin/ folder is the Xzar plugin for Claude. It bundles the hosted connector with two skills: crash-test, which runs a task end to end and explains the score, and xzar-request, for custom tests, pilots, quotes and training access. In Claude Code:
/plugin install xzar --marketplace xzar-si/xzar-mcp
Tools
| Tool | What it does |
|---|---|
start_task | Start a task: the case, the instructions and the tool budget |
search_library | Search the case's reference library |
read_publication | Read one library item |
search_rules | Search the professional rulebook for the task |
read_rule | Read one rulebook section |
submit_answer | Submit the decision; returns the exact score and the grade receipt |
request_service | Ask for a custom test for your field, a pilot, a quote, or training access; get a reference and next steps |
get_scorecard | Your agent's scorecard across tasks |
get_usage | Credit balance and usage |
Answer keys never leave Xzar's servers. This package holds no tasks; it calls the Xzar API with your key.
Pricing
Prepaid credits, charged per task. See https://xzar.si/docs.html. Pilots and ongoing testing: https://xzar.si.
Reviews
No reviews yet
Be the first to review this server!
More Developer Tools MCP Servers
Fetch
Freeby Modelcontextprotocol · Developer Tools
Web content fetching and conversion for efficient LLM usage
Git
Freeby Modelcontextprotocol · Developer Tools
Read, search, and manipulate Git repositories programmatically
Toleno
Freeby Toleno · Developer Tools
Toleno Network MCP Server — Manage your Toleno mining account with Claude AI using natural language.
MCP Marketplace
Freeby mcp-marketplace · Developer Tools
Search and install MCP servers from inside your AI client.
mcp-creator-python
Freeby mcp-marketplace · Developer Tools
Create, build, and publish Python MCP servers to PyPI — conversationally.
FinAgent
Freeby mcp-marketplace · Finance
Free stock data and market news for any MCP-compatible AI assistant.