Claude plugin: MCP server, setup and security

What Claude plugin does

According to its repository: “Scan and fix a domain's email authentication (SPF, DMARC, DKIM, MX), blacklist status and domain/SSL expiry, with deterministic, validated fix records.”

The Model Context Protocol (MCP) is a standard plug between an AI agent and an outside service: once the server is connected, its tools show up in the agent, which decides when to call them. Claude plugin is listed under Security, a category of 133 servers in the directory, where it ranks #123 by stars.

Topics declared by the repository: claude, dkim, dmarc, email-security, spf, dns-doctor.

Installing and connecting Claude plugin

Distribution modes declared in the official MCP registry:

• npm package (Node.js, usually started with npx)
• remote server (streamable-http): you connect to it by URL, with nothing to install locally

It works with any MCP-compatible client (Claude Desktop, Claude Code, Cursor, VS Code, Codex and most recent agents). You add one entry to the client's MCP configuration: server name, start command or URL, environment variables. Project language: Python.

Security: what to check

Connecting an MCP server means installing software that talks straight to your agent: it runs with your rights and the model trusts its tool descriptions. The risk therefore depends on what it can touch and how far its code can be trusted.

None of the risk signals we track (system access, secrets, missing licence, abandonment) applies to Claude plugin. That does not replace reading the code.

Good practice: grant only the rights needed (least privilege), require human approval for irreversible actions, and run the AI agent security check.

Project activity and maintenance

Created on July 22, 2026, the dnsdoctor/claude-plugin repository has 2 stars and 0 forks, with 0 open issues. It has more stars than 8% of the servers in the directory. It received changes this month. Version published in the registry: 1.14.0 (October 20, 2026).

Stars measure attention, not quality: a recent, heavily promoted project can collect them fast, while a useful but niche server will have few.