The Tax Engine MCP server,
connected in one click.
Deterministic Czech OSVC tax tools for 2026: tax, insurance, deadlines, VAT and exchange rates. Connect the official Tax Engine MCP server to Claude, ChatGPT, or Cursor through gate — one gateway URL, no config files, security-checked.
Free to start · No credit card · No hosting needed
What your AI can do with Tax Engine
Real prompts you can type the moment it's connected — no setup, no docs to read.
“Use “compute_year”: Computes a full Czech OSVČ tax year from personal facts: income tax with credits (children, spouse, deductions), social and health insurance.”
“Use “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 m.”
“Use “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 fla.”
“Use “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 m.”
How secure is the Tax Engine MCP server?
Every server in the gate directory has to pass the same four checks before your AI can touch it. Here's how Tax Engine holds up.
Official endpoint
Operated by Tax Engine (freelax.cz) at its documented MCP endpoint — not a third-party mirror or community re-host.
No sign-in needed
This server only exposes public data — no account and no credentials are involved when you connect.
Scanned before it goes live
gate checks every tool for prompt injection, hidden instructions, data-exfiltration hints, and over-broad permissions before the server is available through your gateway.
Watched for drift
If Tax Engine adds or changes tools later, gate re-scans and alerts you — before your AI acts on the change.
Connected in three steps
Connect your gate
Add one gateway URL to Claude, ChatGPT, or any MCP client. One-time setup, about two minutes.
Pick Tax Engine
Choose Tax Engine in the gate directory. No sign-in needed.
Use it anywhere
Tax Engine's tools are live in every AI client you've connected — with rules and logging built in.
Free to start · No credit card · No hosting needed
The actual tools Tax Engine exposes
Fetched live from the official endpoint and re-checked daily by gate — not marketing copy.
compute_year — Computes a full Czech OSVČ tax year from personal facts: income tax with credits (children, spouse, deductions), social and health insurance
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 m
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 fla
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 m
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 202
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, it
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 ad
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 f
+ 6 more tools once connected
The Tax Engine MCP server at a glance
https://freelax.cz/api/mcpQuestions, answered
Is there an official Tax Engine MCP server?
Yes — Tax Engine operates its own remote MCP server at freelax.cz. gate connects you to that official endpoint and adds security scanning, per-tool access rules, and an activity log on top.
How do I connect Tax Engine to Claude or ChatGPT?
Add gate's gateway URL to your AI client once, then pick Tax Engine in the directory. No account or sign-in is needed. From then on, Tax Engine's tools are available in every client you've connected to gate.
Do I need to host anything?
No. Tax Engine runs the server, and gate is fully managed. You just connect one URL — there's nothing to install, deploy, or maintain.
Is the Tax Engine MCP server safe to connect?
It's the vendor's official endpoint, and gate scans its tools for prompt injection and hidden instructions before it goes live, re-checks it whenever it changes, and lets you allow, block, or require approval for every single tool.
Is it free?
Yes — you can get started with gate for free and connect Tax Engine in minutes. No credit card required.
Connect more than just Tax Engine
Every server below works through the same gateway URL — connect once, add tools anytime.
Squarespace DomainsDesignView →Set up Tax Engine in: Claude · Claude Code · ChatGPT · Cursor · VS Code