syn.tax MCP Server: Install & Setup

Install syn.tax in Claude Code

Claude Code

claude mcp add --transport http syn-tax https://actions.syn-tax.de/mcp

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

{
  "mcpServers": {
    "syn-tax": {
      "url": "https://actions.syn-tax.de/mcp"
    }
  }
}

Frequently asked questions

What does the syn.tax MCP server do?

German tax-firm workflows: clients, deadlines, documents, time tracking and DATEV data via OAuth.

Is the syn.tax MCP server free?

The server is free, but you will likely need an account. The server itself is free, but it connects to a service that needs an account or API key, which may have paid tiers. Check the provider for current pricing.

Does syn.tax run locally or remotely?

Remote. Hosted by the provider. You connect with a URL, nothing to install.

How do I add syn.tax to Claude Code?

Run: claude mcp add --transport http syn-tax https://actions.syn-tax.de/mcp

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