ARES (Czech business registry) vs Polish KYB
A side-by-side look at the ARES (Czech business registry) and Polish KYB MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
Verdict: choose ARES (Czech business registry) for legal work as a local process; choose Polish KYB for legal over a hosted endpoint. You can also run both side by side in one mcpServers block.
Which MCP server should you choose?
Choose ARES (Czech business registry) when
- You need dedicated capabilities in the Legal domain.
- You prefer a local stdio subprocess transport.
- You want tools like
ares_validate_ico, ares_lookup_company, ares_search_companies.
Choose Polish KYB when
- You need dedicated capabilities in the Legal domain.
- You prefer a remote HTTP/SSE transport.
- Its auth model fits you: API key required.
- You want tools like
search_companies, get_company_people, get_company_debt_registry.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | ||
|---|---|---|
| Category | Legal | Legal |
| Quality signal | 55/100 · Good | 53/100 · Good |
| Install command | Confirmed | Confirmed |
| Transport | Local subprocess (stdio) | Remote HTTP/SSE |
| Auth | Not declared | API key required |
| Pricing | Not declared | Not declared |
| Required env vars | None listed | None listed |
| Verified owner | Community listing | Community listing |
| GitHub stars | 0 | 0 |
| Directory activity | 4 views 0 installs 0 upvotes | 1 views 0 installs 0 upvotes |
| Tools | 14 | 6 |
| Full listing | View ARES (Czech business registry) | View Polish KYB |
Tools & capabilities
ARES (Czech business registry) tools 14
ares_validate_icoMod-11 checksum validation. No network call.ares_lookup_companyAggregated company profile by IČO.ares_search_companiesStructured search by name, postcode, NACE, legal form.ares_get_statutory_bodiesDirectors, board, partners (from VR).ares_get_trade_licensesTrade licenses (from RŽP).ares_check_vat_payerVAT-payer status with optional DIČ cross-check.ares_standardize_addressCanonicalize a free-form address via RÚIAN.ares_lookup_cz_naceCZ-NACE classification lookup.ares_cross_company_personsGiven 2–50 IČOs, find persons who hold active statutory roles in two or more of them. Returns JSON + Mermaid graph.ares_search_by_addressFind all entities at a given address. Flags virtual offices / shell-address concentrations.ares_get_res_classificationStatistical classification from RES — size bracket, ESA 2010 sector, NUTS region.ares_check_insolvenciFast red-flag: is the entity currently in insolvency proceedings (IR) or marked as bankrupt (CEÚ)?- +2 more on the listing page
Polish KYB tools 6
search_companiesFind the company and read its KRS registry profile and VAT status.get_company_peopleManagement board, supervisory board, shareholders and beneficial owners (CRBR).get_company_debt_registryInsolvency and restructuring proceedings (KRZ).get_company_court_gazetteCourt and Commercial Gazette (MSiG) notices.get_company_sanctionsSanctions lists and KNF financial supervision register.get_company_secured_liabilitiesSecured liabilities and articles of association.
Ready-to-paste client configs
Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.
ARES (Czech business registry)
{
"mcpServers": {
"ares-czech-business-registry": {
"command": "npx",
"args": [
"-y",
"form"
]
}
}
}
Polish KYB
{
"mcpServers": {
"polish-kyb": {
"url": "https://compabase.com/api/mcp/kyb"
}
}
}
Frequently asked questions
ARES (Czech business registry) is categorized under Legal and uses a local stdio subprocess. Polish KYB belongs to Legal and uses a remote HTTP/SSE transport. Pick ARES (Czech business registry) for legal work and Polish KYB for legal.
Copy the mcpServers block from the config section on this page into your client's config (for example claude_desktop_config.json or ~/.cursor/mcp.json), then fully restart the client.
ARES (Czech business registry) has no declared pricing — check the project's own site. Polish KYB has no declared pricing — check the project's own site. Auth: api key required. If a server needs environment variables such as API keys, define them under the env key in your client's MCP config.
Yes. MCP clients support multiple servers: add ares-czech-business-registry and polish-kyb as separate keys in the same mcpServers object, and your assistant will call tools from either one.
On AllMCPs, ARES (Czech business registry) has a quality signal of 55/100 (Good) with 4 views, 0 installs and 0 GitHub stars. Polish KYB has 53/100 (Good) with 1 views, 0 installs and 0 GitHub stars.