Czech Company Registry (ARES) Tools

io.github.appvantagelabs2-a11y/czidVersion 1.0.1

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

Status

Responds423 msNov 14, 2026, 14:45 UTCAnswered our handshake without sign-in.

Registry data may be out of date

We could not refresh it, so this page shows the last copy.

Last checked: Nov 14, 2026, 14:45 UTC
Latency: 423 ms
Remotes responding: 1 of 1
Sign-in: No sign-in
Hosting: Hosted outside the EU (detected)
Registry data as of: Nov 14, 2026, 22:14 UTC

Data from the official MCP Registry, checked by run.zero. How we check

Connect

Streamable HTTP

https://czid.casuyi.com/mcpResponds423 msNov 14, 2026, 14:45 UTC

No sign-in

Claude Code

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

Claude Desktop and claude.ai

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Settings > Connectors > Add custom connector
Name: czid
Remote MCP server URL: https://czid.casuyi.com/mcp

Cursor

{
  "mcpServers": {
    "czid": {
      "url": "https://czid.casuyi.com/mcp"
    }
  }
}

VS Code

code --add-mcp '{"name":"czid","type":"http","url":"https://czid.casuyi.com/mcp"}'

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Tools

6 tools

Tools of Czech Company Registry (ARES) Tools
	Description		Read-only	Idempotent	Open world
`address_check`Free-text Czech address -> RÚIAN-standardized (full KOD ADM, codes for obec/část/ulice, correct PSC).	Free-text Czech address -> RÚIAN-standardized (full KOD ADM, codes for obec/část/ulice, correct PSC).	Not declared	Not declared	Not declared	Not declared
`check_vat`Plátce-DPH status from the ARES RZP record, cross-checked against the ARES DPH source flag. RZP is a HISTORICAL register (records can stop updating in 2016), so a positive here is not proof of current plátcost — the result carries registerState + caution when the two disagree. For a legally binding check use the MOF DPH register (ADISREG). Batch up to 20 IČOs.	Plátce-DPH status from the ARES RZP record, cross-checked against the ARES DPH source flag. RZP is a HISTORICAL register (records can stop updating in 2016), so a positive here is not proof of current plátcost — the result carries registerState + caution when the two disagree. For a legally binding check use the MOF DPH register (ADISREG). Batch up to 20 IČOs.	Not declared	Not declared	Not declared	Not declared
`company_lookup`Basic register (ARES) lookup: name, legal form, registered address, NACE, data-box, VAT DIČ. Input: IČO (8 digits) or DIČ (CZ+10).	Basic register (ARES) lookup: name, legal form, registered address, NACE, data-box, VAT DIČ. Input: IČO (8 digits) or DIČ (CZ+10).	Not declared	Not declared	Not declared	Not declared
`entity_status`KYC-style snapshot: active/cancelled, which registers the entity appears in (VR, RZP, IR insolvency, NRPZS, RCNS, SZR...), plus an insolvency presence flag (IR). Insolvency is presence-only — case detail needs ISIR.	KYC-style snapshot: active/cancelled, which registers the entity appears in (VR, RZP, IR insolvency, NRPZS, RCNS, SZR...), plus an insolvency presence flag (IR). Insolvency is presence-only — case detail needs ISIR.	Not declared	Not declared	Not declared	Not declared
`search_company`Company-name search in ARES (prefix match, case-insensitive; no wildcards). Returns IČOs + names + addresses for further lookups.	Company-name search in ARES (prefix match, case-insensitive; no wildcards). Returns IČOs + names + addresses for further lookups.	Not declared	Not declared	Not declared	Not declared
`validate_cz`Checksum/format validation: IČO (mod-11), DIČ (CZ+IČO or birth number), IBAN (mod-97, CZ-specific), variable symbol. Pure local, no network.	Checksum/format validation: IČO (mod-11), DIČ (CZ+IČO or birth number), IBAN (mod-97, CZ-specific), variable symbol. Pure local, no network.	Not declared	Not declared	Not declared	Not declared

Details

Registry status: Active
Published: Sep 16, 2026
Updated: Sep 16, 2026
Website: https://czid.casuyi.com/⁠ (opens in a new tab)
Repository: Not given
Categories (suggested): Invoicing and accountingSuggested categories are assigned automatically from the registry text and may be wrong. Verified operators can correct them.
GDPR: Not declared

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