LocalFree

Speclock MCP server

sgroy10/speclock

AI Constraint Engine — enforces CLAUDE.md and .cursorrules as laws. 51 MCP tools.

25 GitHub stars6 forks693 npm downloads / month
Source code

Install Speclock in Claude Code

Claude Code
claude mcp add speclock -- npx -y speclock
mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)
{
  "mcpServers": {
    "speclock": {
      "command": "npx",
      "args": [
        "-y",
        "speclock"
      ]
    }
  }
}

Frequently asked questions

What does the Speclock MCP server do?

AI Constraint Engine — enforces CLAUDE.md and .cursorrules as laws. 51 MCP tools.

Is the Speclock MCP server free?

Yes, most likely. Open source and no paid account or API key is mentioned in the listing. Check the provider for current pricing.

Does Speclock run locally or remotely?

Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.

How do I add Speclock to Claude Code?

Run: claude mcp add speclock -- npx -y speclock

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