OSVcalc

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How to connect

Add it to any MCP client that supports remote servers.

{
  "mcpServers": {
    "osvcalc": {
      "type": "http",
      "url": "https://osvcalc.cz/api/mcp"
    }
  }
}

2 tools

• calculate_osvc_taxes

  Computes the 2026 income tax, social and health insurance doplatek for a Czech OSVČ (self-employed person), given what they've been paid so far this year and their situation. Also returns VAT registration status, a regime comparison, next year's advances, and a filing guide…

• get_field_guide

  Returns every field calculate_osvc_taxes accepts, grouped the way the web calculator groups them, with the same label and explanation shown in its tooltips. Use this to explain an option to the user before they've decided on a value, without running a calculation.

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