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The Ultimate Critic

Official registry AI and agents

Check AI work against requirements and return structured verdicts, findings, and repair steps.

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http the-ultimate-critic 'https://ultimate-critic.fly.dev/mcp' --header 'X-API-Key: <TUC tenant key. Omit it to use the free preview tool.>'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "the-ultimate-critic": {
            "type": "http",
            "url": "https://ultimate-critic.fly.dev/mcp",
            "headers": {
                "X-API-Key": "<TUC tenant key. Omit it to use the free preview tool.>"
            }
        }
    }
}

Frequently asked questions

What is The Ultimate Critic?

Check AI work against requirements and return structured verdicts, findings, and repair steps.

How do I install The Ultimate Critic?

It runs as a remote server. In Claude Code: claude mcp add --transport http the-ultimate-critic 'https://ultimate-critic.fly.dev/mcp' --header 'X-API-Key: <TUC tenant key. Omit it to use the free preview tool.>'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does The Ultimate Critic need an API key?

Yes. It expects X-API-Key, which you set in its configuration.

Who maintains The Ultimate Critic?

It is published by marksignals. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.