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8 clients · secrets stay placeholders

JSON (mcpServers)Claude CodeCodexOpenCodeCursorVS CodeGemini CLIGoose

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

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

[mcp_servers.tax-engine]
url = "https://freelax.cz/api/mcp"

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "tax-engine": {
      "type": "remote",
      "url": "https://freelax.cz/api/mcp",
      "enabled": true
    }
  }
}

{
  "mcpServers": {
    "tax-engine": {
      "type": "http",
      "url": "https://freelax.cz/api/mcp"
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=tax-engine&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vZnJlZWxheC5jei9hcGkvbWNwIn0%3D"
}

{
  "servers": {
    "tax-engine": {
      "type": "http",
      "url": "https://freelax.cz/api/mcp"
    }
  }
}

{
  "mcpServers": {
    "tax-engine": {
      "httpUrl": "https://freelax.cz/api/mcp"
    }
  }
}

extensions:
  "tax-engine":
    enabled: true
    name: "tax-engine"
    type: streamable_http
    uri: "https://freelax.cz/api/mcp"
    timeout: 300

Quality 89 / 100good

protocol88 · weight 25

pass
protocol.modernsupports 2026-07-28 (server/discover)
pass
protocol.statelessanswers without a session
pass
protocol.transportstreamable HTTP
warn
protocol.list_ttltools/list declares ttlMs 0, so clients re-fetch it on every use

authorizationn/a · weight 15

n/a
auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
n/a
auth.secret_in_urlno templated URL

tool hygiene86 · weight 30

pass
tools.descriptionsevery tool has a description
pass
tools.description_lengthdescriptions are concise
pass
tools.schemasevery tool has an object input schema
pass
tools.annotations14 of 14 tools declare readOnlyHint or destructiveHint
fail
tools.directory_hintsno tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: estimate_penalty (destructiveHint, idempotentHint, openWorldHint); get_flat_tax_band (destructiveHint, idempotentHint, openWorldHint); calc_flat_tax_settlement (destructiveHint, idempotentHint, openWorldHint); …
pass
tools.token_costabout 4,359 tokens to load every tool
pass
tools.api_dumptools are not a one-to-one API dump

stability100 · weight 15

pass
stability.changesno tool changes in 30 days
pass
stability.rug_pullno tool changed its meaning under the same name

dependenciesn/a · weight 15

n/a
deps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI package

14 tools, about 4,359 tokens to load them all · tool set 5536d394de5d · checked 2026-10-20 14:54 UTC

Tool changes

No tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 80 / 100

no-repository

provenance55

liveness100

freshness85

hygiene80

+dns-namespace +website +reachable +uptime-100% ~updated-80d-ago -no-repository

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Endpoints

remote	auth	reachable	uptime 30d	p50	protocol	last ok
`https://freelax.cz/api/mcp` streamable-http	none	yes	100%	768 ms	2026-07-28	2026-10-20

Tools (14)

`calc_flat_tax_settlement`read-only	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-tax regime (income above 2,000,000 CZK).
`calc_set_aside`read-only	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 + §9 rental income and the paušální daň (flat tax) regimes.
`check_flat_tax_eligibility`read-only	Screens whether an OSVČ may enter or stay in the paušální daň (flat tax) regime: public health insurance participation (decisive for foreigners), VAT-payer status, income ceiling 2,000,000 CZK, side income and secondary activity. Returns reasons with severity.
`check_io_trigger`read-only	Checks whether buying services from abroad (Google Ads, Meta, ChatGPT, hosting…) or selling services to EU businesses has made an OSVČ an identifikovaná osoba under § 6h/§ 6i ZDPH, with the 15-day registration deadline (§ 97) and fact-freshness handling. Verdict: ok / check / act_now.
`check_thresholds`read-only	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 bracket, and the paušální daň eligibility ceiling. Reports approaching (90%), exceeded and remaining amounts.
`compare_regimes`read-only	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, spouse), and recommends the cheaper regime.
`compute_year`read-only	Computes a full Czech OSVČ tax year from personal facts: income tax with credits (children, spouse, deductions), social and health insurance, monthly set-aside, safe-to-spend, flat-tax band and regime-eligibility evaluation. All figures come from the deterministic Freelax engine, never from the model.
`convert_eur_czk`read-only	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 and whether a stale cached ČNB publication had to be used. Fails closed when no verified ČNB rate is available.
`czech_working_days`read-only	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 deadline would shift to.
`estimate_penalty`read-only	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 tax payments, 200 CZK health aggregation floor and the 1,000 CZK tax non-assessment threshold. A dated estimate is rejected when its required rate period falls outside the implemented history.
`get_filing_deadlines`read-only	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 holiday shifts are applied.
`get_flat_tax_band`read-only	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 threshold to watch.
`get_prehled_deadlines`read-only	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 the payment due date (8 calendar days after the filing deadline).
`get_rule_source`read-only	For a Czech OSVČ tax topic, returns the governing rule with current values, primary-source citations (zákon, ČSSZ, VZP, Finanční správa) with verification dates, and related Freelax articles. Topics: pausalni_dan, identifikovana_osoba, dph_registrace, zalohy, prehledy, penale, danove_pasmo_23, vedlejsi_cinnost.

Schemas: list_tools.

Similar MCP servers

Official server.json

{
  "name": "cz.freelax/tax-engine",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://freelax.cz/api/mcp",
      "type": "streamable-http"
    }
  ],
  "version": "1.0.0",
  "websiteUrl": "https://freelax.cz/connect",
  "description": "Deterministic Czech OSVC tax tools for 2026: tax, insurance, deadlines, VAT and exchange rates."
}