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Czech Company Registry (ARES) Tools

by appvantagelabs2-a11y · remote · no sign-in to list tools · v1.0.1 · published by GitHub user appvantagelabs2-a11y

Czech ARES company registry: VAT, insolvency, RÚIAN addresses, IČO/DIČ checks. All free, no auth.

Changes · 2
CompareRegistry entry

6 tools: 2 change things and 4 only read.

Scanned Oct 21, 2026

No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http czid https://czid.casuyi.com/mcp

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

6 tools

Changes things 2Claude Code: ask
  • address_checkFree-text Czech address -> RÚIAN-standardized (full KOD ADM, codes for obec/část/ulice, correct PSC).No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    Description, as the server wrote it
    Free-text Czech address -> RÚIAN-standardized (full KOD ADM, codes for obec/část/ulice, correct PSC).
  • check_vatAuthoritative plátce-DPH status from RZP register: payer yes/no, effective from, tax office, trade licences.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    Description, as the server wrote it
    Authoritative plátce-DPH status from RZP register: payer yes/no, effective from, tax office, trade licences. Use before issuing/czech invoicing. Batch up to 20 IČOs.
Only reads 4Claude Code: allow
  • company_lookupBasic register (ARES) lookup: name, legal form, registered address, NACE, data-box, VAT DIČ.No findings

    Why it is in this group

    • The name "company_lookup" says "lookup": a word for reading.
    Description, as the server wrote it
    Basic register (ARES) lookup: name, legal form, registered address, NACE, data-box, VAT DIČ. Input: IČO (8 digits) or DIČ (CZ+10).
  • entity_statusKYC-style snapshot: active/cancelled, which registers the entity appears in (VR, RZP, NRPZS, RS insolvency, RCNS, SZR...), plus insolvency-register record if present.No findings

    Why it is in this group

    • The name "entity_status" says "status": a word for reading.
    Description, as the server wrote it
    KYC-style snapshot: active/cancelled, which registers the entity appears in (VR, RZP, NRPZS, RS insolvency, RCNS, SZR...), plus insolvency-register record if present.
  • search_companyCompany-name search in ARES (prefix match, case-insensitive; no wildcards).No findings

    Why it is in this group

    • The name "search_company" says "search": a word for reading.
    Description, as the server wrote it
    Company-name search in ARES (prefix match, case-insensitive; no wildcards). Returns IČOs + names + addresses for further lookups.
  • validate_czChecksum/format validation: IČO (mod-11), DIČ (CZ+IČO or birth number), IBAN (mod-97, CZ-specific), variable symbol.No findings

    Why it is in this group

    • The name "validate_cz" says "validate": a word for reading.
    Description, as the server wrote it
    Checksum/format validation: IČO (mod-11), DIČ (CZ+IČO or birth number), IBAN (mod-97, CZ-specific), variable symbol. Pure local, no network.

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 1.0.1. Values in angle brackets are yours to fill in.

claude mcp add --transport http czid https://czid.casuyi.com/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__czid__company_lookup",
      "mcp__czid__entity_status",
      "mcp__czid__search_company",
      "mcp__czid__validate_cz"
    ],
    "ask": [
      "mcp__czid__check_vat",
      "mcp__czid__address_check"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as czid. Review it before you use it.