Cyon

What the cyon MCP server does

The cyon MCP server gives an AI assistant access to selected cyon hosting resources. It can read the hostings available to the connected account and perform hosting tasks through the MCP connection. Supported operations include creating subdomains, creating databases, creating certificates, and publishing a site.

This makes the project relevant to developers who want Claude Code or Codex to handle parts of a website deployment workflow on cyon. The available material describes hosting administration and publishing, rather than general-purpose infrastructure management outside cyon.

How it works

The plugin supplies skills that describe cyon hosting and explain how the assistant connects to the cyon MCP server. The MCP connection is authenticated through my.cyon. For Claude Code, authentication is part of the plugin workflow. For Codex, the documented command is codex mcp login cyon.

At the first tool call, or during the Codex login command, a browser opens my.cyon. After signing in, approve the connection and select the hostings that the assistant is allowed to reach. The cyon MCP server then exposes the approved hosting access to the assistant through its tools.

Setup and configuration

Claude Code installation uses the cyon plugin marketplace:

claude plugin marketplace add cyon/cyon-plugin
claude plugin install cyon@cyon

Codex installation uses these commands:

codex plugin marketplace add cyon/cyon-plugin
codex plugin add cyon@cyon
codex mcp login cyon

A browser-based approval step is required. The account holder chooses the permitted hostings in my.cyon, which limits where the assistant can operate. No environment variables or local configuration values are documented in the supplied material.

Tools and capabilities

The documented capabilities are:

• Read the account's hostings.
• Create subdomains.
• Create databases.
• Create certificates.
• Publish a site.

The cyon MCP server is therefore suited to workflows that combine hosting setup with deployment. The README does not provide individual tool names, argument schemas, return formats, or details about supported site frameworks.

Limitations and notes

The repository is published from cyon's own repository, and its README says that pull requests are not merged there. Support questions and problems should be directed to cyon support. The supplied instructions name Claude Code and Codex as supported plugin environments; they do not document setup for other MCP clients.

Access is not automatically granted to every hosting in the account. The user must approve the connection and choose which hostings the assistant may reach. Because the available documentation does not describe permission levels beyond that selection, developers should verify account behavior with cyon before using the integration for production changes.