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Zefix MCP Server

Company search in Swiss Central Business Name Index (zefix.ch)

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What is the Zefix MCP Server?

Company search in Swiss Central Business Name Index (zefix.ch)

What the server does

  1. Go to the Releases page and download the latest zefix.mcpb file. 2. Double-click it — Claude Desktop opens automatically. 3. Click Install.
  • Allows your AI-assistant to search for companies incorporated in Switzerland by their name or UID (CHE-nnn.nnn.nnn) with optional filters by canton of incorporation, legal form, location, previous names, etc. (mimics all filters in Zefix GUI)

Credentials and setup notes

  • MCP host application (Claude, LLM Studio, VSCode+GHCP/Cline, Cursor, Dive, LibreChat, DeepChat, Chainlit etc.) - LLM that supports Tool calling (GPT-4.1+ Claude Sonnet/Opus, Gemini, Llama 3.1+, Qwen3.5, etc.) - (optional) Node.js 24+ (for development or local run without npx)

More MCP options

Compare MCP servers by category, or browse hosted MCP servers if you prefer an endpoint over a local process.

Recorded tools

Check the linked publisher documentation and your connected client's tool list. Names and availability can vary with the server version and account permissions.

ToolWhat it does
get_companiesSearch the Zefix registry. All parameters except name_or_uid are optional.

How to install the Zefix MCP Server

{
  "mcpServers": {
    "zefix": {
      "command": "npx",
      "args": ["-y", "zefix-mcp-unofficial"]
    }
  }
}

Configuration as documented by the project. Restart the client after saving.

Configuration

  • MCP host application (Claude, LLM Studio, VSCode+GHCP/Cline, Cursor, Dive, LibreChat, DeepChat, Chainlit etc.) - LLM that supports Tool calling (GPT-4.1+ Claude Sonnet/Opus, Gemini, Llama 3.1+, Qwen3.5, etc.) - (optional) Node.js 24+ (for development or local run without npx)
VariableDescriptionRequired
GITHUB_TOKENCredential the server authenticates with.Yes

Example prompts to try

  • “Use Zefix MCP to name or uid.”
  • “Use Zefix MCP to language key.”
  • “Use Zefix MCP to cantons.”

Frequently asked questions

Company search in Swiss Central Business Name Index (zefix.ch) Confirm the tools offered by your installed version in the connected client. Tool availability and permissions depend on the server and account configuration.

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