# Ares MCP server

Agent View of the PolicyLayer registry record for Ares: identity, probed posture, risk grade, and all 10 tools classified. HTML page: https://policylayer.com/tools/dev-cz-agents-ares

## Facts

- Server id: `https://ares.cz-agents.dev/mcp`
- Homepage: https://github.com/martinhavel/cz-agents-mcp
- Registry record: grade C, identity unverified
- Lifecycle: active
- Auth posture: open
- Rate-limited: yes
- Tools: 10 (10 with introspected schema)
- Tool categories present: Read
- Context-window cost: 1432 tokens per request — https://policylayer.com/token-cost/dev-cz-agents-ares
- Tags: dev cz agents ares
- Record last modified: 2026-08-02T15:32:43.789Z

## Tools (10)

| Tool | Category | Risk | Record |
| --- | --- | --- | --- |
| `check_vat_payer` | Read | Low | https://policylayer.com/tools/dev-cz-agents-ares/check-vat-payer.md |
| `get_bank_accounts` | Read | Low | https://policylayer.com/tools/dev-cz-agents-ares/get-bank-accounts.md |
| `get_history` | Read | Low | https://policylayer.com/tools/dev-cz-agents-ares/get-history.md |
| `get_statutaries` | Read | Low | https://policylayer.com/tools/dev-cz-agents-ares/get-statutaries.md |
| `lookup_by_ico` | Read | Low | https://policylayer.com/tools/dev-cz-agents-ares/lookup-by-ico.md |
| `search_by_address` | Read | Low | https://policylayer.com/tools/dev-cz-agents-ares/search-by-address.md |
| `search_by_nace` | Read | Low | https://policylayer.com/tools/dev-cz-agents-ares/search-by-nace.md |
| `search_companies` | Read | Low | https://policylayer.com/tools/dev-cz-agents-ares/search-companies.md |
| `validate_dic` | Read | Low | https://policylayer.com/tools/dev-cz-agents-ares/validate-dic.md |
| `watch_entity` | Write | Medium | https://policylayer.com/tools/dev-cz-agents-ares/watch-entity.md |

## Tool descriptions

- `check_vat_payer` — 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).
- `get_bank_accounts` — 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.
- `get_history` — Get historical record of a company (previous names, registered address changes, trade license history). Useful for due diligence.
- `get_statutaries` — 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.
- `lookup_by_ico` — 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.
- `search_by_address` — 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.
- `search_by_nace` — 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.
- `search_companies` — 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.
- `validate_dic` — 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.
- `watch_entity` — 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 hu…

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

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Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=dev-cz-agents-ares · API: https://policylayer.com/registry/api · Recommended policies for every tool: https://policylayer.com/policies/dev-cz-agents-ares