MCP server

OSVcalc Official

cz.osvcalc/osvcalc

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

Czech OSVČ tax calculator: income tax, social and health insurance, VAT, paušální daň.

Working at last checkVerified publisher: osvcalc.czAbout 5,814 tokens per request once connected2 tools

https://osvcalc.cz/api/mcp

At a glance

Type: MCP server
Publisher: osvcalc.cz (verified by the MCP Registry)
Status: Working at last check
Tools: 2
Token cost: About 5,814 tokens per request
Sets up in: Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok
Last checked: 26 Oct 2026, 08:29 UTC

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http osvcalc https://osvcalc.cz/api/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.osvcalc]
url = "https://osvcalc.cz/api/mcp"

Gemini CLI

{"mcpServers":{"osvcalc":{"httpUrl":"https://osvcalc.cz/api/mcp"}}}

Cursor

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

VS Code

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

Antigravity

agy mcp add osvcalc https://osvcalc.cz/api/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"osvcalc","server_url":"https://osvcalc.cz/api/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"osvcalc","server_url":"https://osvcalc.cz/api/mcp"}

calculate_osvc_taxes ~5661 tokens
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, with an explanation in t
get_field_guide ~153 tokens
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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