Checker MCP Server: Install & Setup

Install Checker in Claude Code

Claude Code

claude mcp add checker -- npx -y @oksigenia/checker-mcp

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "checker": {
      "command": "npx",
      "args": [
        "-y",
        "@oksigenia/checker-mcp"
      ]
    }
  }
}

Frequently asked questions

What does the Checker MCP server do?

Local-first domain security and privacy checker: live SPF, DMARC, DKIM, DNSSEC, TLS, CAA and security header checks, scored with remediation advice.

Is the Checker 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 Checker run locally or remotely?

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

How do I add Checker to Claude Code?

Run: claude mcp add checker -- npx -y @oksigenia/checker-mcp

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