Czech Company Registry (ARES) Tools

io.github.appvantagelabs2-a11yPublished by GitHub account appvantagelabs2-a11yv1.0.1Updated Oct 24, 2026

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

VerifiedStreamable HTTPWeb executableFinanceBusiness & Commerce

Overview

AI-generated overview

Lets an assistant look up Czech company registry data from ARES, including VAT status, insolvency records, RÚIAN addresses, and IČO/DIČ checks.

What you can do
This remote MCP server exposes tools for querying the Czech ARES company registry. According to its description, it covers VAT registration, insolvency information, RÚIAN addresses, and validation of Czech company identifiers (IČO) and tax identifiers (DIČ). It is a read-only lookup service reached over streamable HTTP at a hosted endpoint.
When to use it
Use it when an assistant needs to verify or enrich Czech business records, for example checking a supplier's IČO or DIČ, confirming VAT status, screening for insolvency, or resolving a registered address.
Requirements
A remote MCP client that supports streamable HTTP, plus network access to the hosted endpoint. No authentication, API keys, environment variables, or headers are declared, and no local runtime or package is needed.
Before you install
The description states the service is free and requires no authentication, so no credentials are requested. Queries are sent to a third-party hosted endpoint, so lookups and any identifiers you submit leave your machine; avoid sending confidential business data you would not share with an external service.

Installation

In SourceWeft

  1. Open Czech Company Registry (ARES) Tools in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/io.github.appvantagelabs2-a11y%2Fczid/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "czech-company-registry-ares-tools": {
      "type": "http",
      "url": "https://czid.casuyi.com/mcp"
    }
  }
}

Tools

6

company_lookup

Lookup Czech company by IČO or DIČ

Basic register (ARES) lookup: name, legal form, registered address, NACE, data-box, VAT DIČ. Input: IČO (8 digits) or DIČ (CZ+10).

Parametersidrequired

check_vat

Czech VAT (DPH) status check

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.

Parametersidsrequired

entity_status

Entity risk snapshot (registers + insolvency)

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.

Parametersidrequired

search_company

Search Czech companies by name

Company-name search in ARES (prefix match, case-insensitive; no wildcards). Returns IČOs + names + addresses for further lookups.

Parametersnamerequiredlimit

validate_cz

Validate Czech identifiers (offline)

Checksum/format validation: IČO (mod-11), DIČ (CZ+IČO or birth number), IBAN (mod-97, CZ-specific), variable symbol. Pure local, no network.

ParametersdicicoibanvariableSymbol

address_check

Standardize Czech address (RÚIAN)

Free-text Czech address -> RÚIAN-standardized (full KOD ADM, codes for obec/část/ulice, correct PSC).

Parametersaddressrequired

Version history

2
  1. v1.0.1LatestSep 16, 2026
  2. v1.0.0Sep 16, 2026

Score

83% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • LicenseNot applicable

    A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.