Neutral tie-breaks between AI agents and sealed review of an agent's output, with signed receipts.
To add Agent Referee 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.
Install
npx -y agent-referee-mcp@0.4.0Environment variables
AGENT_REFEREE_PRIVATE_KEYSet in your MCP configAGENT_REFEREE_DAILY_LIMIT_USDSet in your MCP configInstall with your client
claude mcp add agent-referee --env AGENT_REFEREE_PRIVATE_KEY=<YOUR_AGENT_REFEREE_PRIVATE_KEY> --env AGENT_REFEREE_DAILY_LIMIT_USD=<YOUR_AGENT_REFEREE_DAILY_LIMIT_USD> -- npx -y agent-referee-mcp@0.4.0
Run this in a terminal to add the server to Claude Code.
What this does
Agent Referee 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:
AGENT_REFEREE_PRIVATE_KEY AGENT_REFEREE_DAILY_LIMIT_USD
Set these via the env object in your MCP config (see claude_desktop_config.json snippet above).
Frequently asked questions
How do I install Agent Referee?
Run the Claude Code command in the install section to add Agent Referee 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 Agent Referee?
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 Agent Referee as well.
Does Agent Referee need an API key?
Yes. Before it can run, set these environment variables: AGENT_REFEREE_PRIVATE_KEY, AGENT_REFEREE_DAILY_LIMIT_USD. 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.
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