# Freelax Tax Engine MCP server

Source: https://glimind.com/server/mcp-registry%2Fcz.freelax%2Ftax-engine
Registry id: `mcp-registry/cz.freelax/tax-engine`
Status: live (checked 2026-10-26T20:42:59.708Z)

## Measurements (30 days)

- Uptime: 99.91%
- Checks: 4915
- Outages (90 days): 6

## Install

```json
{
  "mcpServers": {
    "freelax-tax-engine-mcp-server": {
      "type": "http",
      "url": "https://freelax.cz/api/mcp"
    }
  }
}
```

Claude Code:

```sh
claude mcp add --transport http freelax-tax-engine-mcp-server https://freelax.cz/api/mcp
```

## Tools (14)

- `calc_flat_tax_settlement`: Given the paušální daň band you paid and the actual annual income, computes whether you owe a doplatek (top-up), get a vratka (refund), or must exit the flat-ta
- `calc_set_aside`: How much of a monthly OSVČ income to set aside for Czech income tax, social and health insurance, and what remains safe to spend. Supports mixed §7 business + §
- `check_flat_tax_eligibility`: Screens whether an OSVČ may enter or stay in the paušální daň (flat tax) regime: public health insurance participation (decisive for foreigners), VAT-payer stat
- `check_io_trigger`: Checks whether buying services from abroad (Google Ads, Meta, ChatGPT, hosting…) or selling services to EU businesses has made an OSVČ an identifikovaná osoba u
- `check_thresholds`: Checks an annual income against the four statutory thresholds: VAT registration 2,000,000 CZK, immediate VAT registration 2,536,500 CZK, the 23% higher tax brac
- `compare_regimes`: Compares the standard OSVČ regime against paušální daň (flat tax) for a yearly income, including tax credits that would be lost with the flat tax (children, spo
- `compute_year`: Computes a full Czech OSVČ tax year from personal facts: income tax with credits (children, spouse, deductions), social and health insurance, monthly set-aside,
- `convert_eur_czk`: Converts an EUR amount to CZK using the Czech National Bank daily exchange rate (the rate used for Czech tax purposes). Reports the rate, its publication date a
- `czech_working_days`: Czech public holidays for a year (including movable Easter feasts) and, for a specific date, whether it is a working day and the next working day a statutory de
- `estimate_penalty`: Estimates the Czech penalty/interest for a late payment or filing: repo rate + 8 p.p. for insurance and tax interest (3.5% H1 / 3.75% H2 2026), 3 grace days for
- `get_filing_deadlines`: Deadline for the Czech personal income tax return (DPFO) for a given tax year, per filing route: paper, self-filed electronic, or via tax advisor. Weekend and h
- `get_flat_tax_band`: Which paušální daň band (pásmo 1/2/3) an annual income falls into given the expense flat-rate, the current monthly payment for that band, and the next income th
- `get_prehled_deadlines`: Filing deadlines for the annual OSVČ Přehled o příjmech a výdajích for both social insurance (ČSSZ) and the health insurer, per tax-return filing route, plus th
- `get_rule_source`: For a Czech OSVČ tax topic, returns the governing rule with current values, primary-source citations (zákon, ČSSZ, VZP, Finanční správa) with verification dates

Measured by Glimind (https://glimind.com): MCP handshake + tool list only, no tool is ever called. CC BY 4.0.