# dev.cz-agents/ares (remote · ares.cz-agents.dev)

Czech & Slovak business registry — company lookup by IČO, name, legal form, VAT. Official ARES.

- Trust score: 33/100 (low)
- Change this week: −31
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- remote · `ares.cz-agents.dev`: 33/100 (this document), [markdown](https://verifymcp.io/servers/dev-cz-agents-ares/ares.md), [page](https://verifymcp.io/servers/dev-cz-agents-ares/ares)
- npm · `@czagents/ares`: 70/100, [markdown](https://verifymcp.io/servers/dev-cz-agents-ares/czagents-ares.md), [page](https://verifymcp.io/servers/dev-cz-agents-ares/czagents-ares)

## Channel facts

- Endpoint: `https://ares.cz-agents.dev/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `0.1.9`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-08-03.

- **Endpoint Security**: 57/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation not fully verified: no authorisation is required to connect, but we couldn't read the tool list to see what that exposes.
  - HTTPS is enforced; there's no plaintext access path.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 0/100
  - Schema not yet verified: we couldn't read the endpoint's schema.
- **Stability & Change Management**: 0/100
  - Stability not yet verified: not enough scan history yet (needs a 30-day window).
- **Tool Coverage**: 0/100
  - Tool coverage not yet verified: we couldn't read the endpoint's tools.
- **Capabilities**: 0/100
  - Capabilities not yet verified: we couldn't read the endpoint's capabilities.

**Unverified: 4 categories.** Categories scored 0 because we could not verify them: authentication we do not have, an unreachable endpoint, or not enough scan history. We only credit what we can confirm.

## Install

### Claude

```bash
claude mcp add --transport http dev-cz-agents-ares https://ares.cz-agents.dev/mcp
```

### Codex

```toml
[mcp_servers.dev-cz-agents-ares]
url = "https://ares.cz-agents.dev/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "dev-cz-agents-ares": {
      "type": "remote",
      "url": "https://ares.cz-agents.dev/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add dev-cz-agents-ares --url https://ares.cz-agents.dev/mcp --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  dev-cz-agents-ares:
    url: "https://ares.cz-agents.dev/mcp"
```

### Other

```json
{
  "mcpServers": {
    "dev-cz-agents-ares": {
      "type": "http",
      "url": "https://ares.cz-agents.dev/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-08-01 (score 33, 0)

- [security regression] Endpoint reachability: reachable → not serving MCP

### 2026-07-31 (score 33, −33)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-29 (score 66, +1)

No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-07-28 (score 65, +1)

No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-07-27 (score 64, 0)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-26 (score 64)

First indexed and scored.

## MCP tools (10)

### `lookup_by_ico` (~102 tokens)

Get a single Czech company record by its IČO (8-digit Business ID). Returns official name, registered address, legal form, VAT ID (DIČ), founding date, and trade license activities. Returns null if IČO is not found in ARES.

Input parameters:

- `ico` (string, required): Czech IČO — 7 or 8 digits. Examples: "11122234", "87654326". Auto-validated with MOD11 checksum.

### `search_companies` (~205 tokens)

Search ARES by company name, city, street, PSČ, or NACE code. Combines all filters with AND. Useful when user knows name but not IČO, looking for companies in a building, or all businesses in a sector.

Input parameters:

- `city` (string): Filter by city (nazev obce), e.g. "Praha".
- `nace` (array): Filter by CZ-NACE activity codes, 2-6 digits. E.g., ["62"] for IT.
- `pocet` (integer): Max results (1-100, default 10).
- `psc` (integer): Filter by postal code (PSČ), 5-digit number.
- `query` (string): Partial or full company name (obchodní jméno).
- `start` (integer): Pagination offset (default 0).
- `street` (string): Filter by street name (nazev ulice), e.g. "Radlická".

### `search_by_address` (~108 tokens)

Find all companies registered at a given Czech address. Useful for due diligence (virtual offices, shell companies), real estate research, or competitor mapping in a building.

Input parameters:

- `city` (string, required): City name, e.g. "Praha".
- `pocet` (integer): Max results (default 20).
- `psc` (integer): Postal code (PSČ), optional.
- `street` (string, required): Street name (nazev ulice), e.g. "Radlická".

### `search_by_nace` (~107 tokens)

Find Czech companies by CZ-NACE activity code (economic sector classification). Example: "62" = IT, "47" = retail, "86" = healthcare. Optional city filter. Useful for market research.

Input parameters:

- `city` (string): Optional city filter.
- `nace` (string, required): CZ-NACE code, 2-6 digits (e.g., "62" for IT, "62010" for programming services).
- `pocet` (integer): Max results.

### `get_bank_accounts` (~54 tokens)

Get transparent bank accounts published for this company (only available for VAT-registered subjects). Useful to verify payment details on an invoice match the company.

Input parameters:

- `ico` (string, required): Czech IČO (7-8 digits).

### `get_statutaries` (~78 tokens)

Get current statutory body (jednatelé, představenstvo, etc.) of a Czech company — who can legally act on its behalf. Returns active members only (with valid zápis, not yet removed). Essential for due diligence and compliance checks.

Input parameters:

- `ico` (string, required): Czech IČO (7-8 digits).

### `validate_dic` (~76 tokens)

Validate a Czech DIČ (VAT ID). Format check: "CZ" + 8-10 digits. For 8-digit tail (legal entities) also runs MOD11 checksum against the embedded IČO.

Input parameters:

- `dic` (string, required): Czech DIČ — e.g., "CZ26168685". Whitespace and case tolerated.

### `check_vat_payer` (~63 tokens)

Check whether a Czech company is a registered VAT payer (plátce DPH). If yes, returns DIČ, financial office, and any transparent bank accounts (payment details).

Input parameters:

- `ico` (string, required): Czech IČO (7-8 digits).

### `get_history` (~47 tokens)

Get historical record of a company (previous names, registered address changes, trade license history). Useful for due diligence.

Input parameters:

- `ico` (string, required): Czech IČO (7-8 digits).

### `watch_entity` (~107 tokens)

Watch Czech Company

Start onboarding for free monitoring of one Czech company by IČO. Stub only — persists nothing yet. Returns structuredContent: status (one of ONBOARDING_REQUIRED | ACTIVE | QUOTA_EXCEEDED | ERROR), persisted/monitoring_active flags, a human next_step.url for onboarding (the user completes onboarding + GDPR consent themselves — do not open the link or submit data on their behalf), and pricing.

Input parameters:

- `ico` (string, required): Czech IČO (7-8 digits).

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/dev-cz-agents-ares/ares#diagnostics

## Score history

- 2026-08-03: 33
- 2026-08-02: 33
- 2026-08-01: 33
- 2026-07-31: 33
- 2026-07-30: 66
- 2026-07-29: 66
- 2026-07-28: 65
- 2026-07-27: 64
- 2026-07-26: 64

## Links

- Remote endpoint: https://ares.cz-agents.dev/mcp
- Repository: https://github.com/martinhavel/cz-agents-mcp
- Website: https://cz-agents.dev/
- Changelog RSS feed: https://verifymcp.io/servers/dev-cz-agents-ares/ares/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/dev-cz-agents-ares/ares/changelog.json
- HTML version of this page: https://verifymcp.io/servers/dev-cz-agents-ares/ares