# Polish KYB (remote · compabase.com)

Know-your-business checks for Polish companies: KRS, owners, insolvency, sanctions, gazette notices.

- Trust score: 76/100 (medium)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-10-24

## Components

- remote · `compabase.com`: 76/100 (this document), [markdown](https://verifymcp.io/servers/contentwriterco-polish-kyb/api-mcp-kyb.md), [page](https://verifymcp.io/servers/contentwriterco-polish-kyb/api-mcp-kyb)

## Channel facts

- Endpoint: `https://compabase.com/api/mcp/kyb`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.0`

## 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 2026-10-24.

- **Endpoint Security**: 74/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - 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**: 65/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 2572 tokens (~214/item across 12 items; 12 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 47/100
  - Stability observed for 14 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 12 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 13 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the Polish KYB MCP server?

Polish KYB is a hosted endpoint at https://compabase.com/api/mcp/kyb, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add --transport http contentwriterco-polish-kyb 'https://compabase.com/api/mcp/kyb'
```

### Cursor

```json
{
  "mcpServers": {
    "contentwriterco-polish-kyb": {
      "url": "https://compabase.com/api/mcp/kyb"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "contentwriterco-polish-kyb": {
      "type": "http",
      "url": "https://compabase.com/api/mcp/kyb"
    }
  }
}
```

### Codex

```toml
[mcp_servers.contentwriterco-polish-kyb]
url = "https://compabase.com/api/mcp/kyb"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "contentwriterco-polish-kyb": {
      "type": "remote",
      "url": "https://compabase.com/api/mcp/kyb",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add contentwriterco-polish-kyb --url 'https://compabase.com/api/mcp/kyb' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  contentwriterco-polish-kyb:
    url: "https://compabase.com/api/mcp/kyb"
```

### Netclaw

```json
{
  "McpServers": {
    "contentwriterco-polish-kyb": {
      "Transport": "http",
      "Url": "https://compabase.com/api/mcp/kyb"
    }
  }
}
```

### Vellum

```bash
assistant mcp add contentwriterco-polish-kyb -t streamable-http -u 'https://compabase.com/api/mcp/kyb'
```

### Other

```json
{
  "mcpServers": {
    "contentwriterco-polish-kyb": {
      "type": "http",
      "url": "https://compabase.com/api/mcp/kyb"
    }
  }
}
```

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.

### 2026-10-24 (score 76, +1)

No change was recorded against any check on this day. Stability & Change Management went from 43 to 47. That category is still filling its 30-day observation window: 13 days of observed history at the previous scan, 14 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-22 (score 75, +1)

No change was recorded against any check on this day. Stability & Change Management went from 37 to 40. That category is still filling its 30-day observation window: 11 days of observed history at the previous scan, 12 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-19 (score 74, +1)

No change was recorded against any check on this day. Stability & Change Management went from 27 to 30. That category is still filling its 30-day observation window: 8 days of observed history at the previous scan, 9 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-17 (score 73, +1)

No change was recorded against any check on this day. Stability & Change Management went from 20 to 23. That category is still filling its 30-day observation window: 6 days of observed history at the previous scan, 7 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-15 (score 72, +1)

No change was recorded against any check on this day. Stability & Change Management went from 13 to 17. That category is still filling its 30-day observation window: 4 days of observed history at the previous scan, 5 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-13 (score 71, +1)

- [cosmetic] “search_companies” reworded the description of “sort_by”

### 2026-10-12 (score 70, +1)

- [functional improvement] Stability: unverified → 0.07

### 2026-10-10 (score 69)

First indexed and scored.

## MCP tools (12)

### `search_companies` (~1010 tokens)

Search Polish Companies

Search and filter Polish KRS companies (spółki). Compabase also holds the full CEIDG/JDG register; this tool does not browse JDG — those without a public contact email are hidden because of RODO. Default `fields=summary` returns a compact row (name, NIP, KRS, location, PKD, latest financials, email/phone/website) — small enough for MCP clients. `fields=contacts_only` is name/NIP/KRS/city/email/phone/website only. `fields=full` returns every company_search column plus contacts and may exceed client size limits. Use for rankings, sector filters, city/county/region browsing, name search, or NIP/KRS lookup. When a PKD is mostly JDG, a sparse result includes a `hint` (full CEIDG is in the database; listing is RODO-gated). Do not call export_companies just to get a handful of emails or phones.

Input parameters:

- `all_pkd` (string): Match any PKD code in the company's activity list (not just primary).
- `capital_max` (number): Maximum share capital.
- `capital_min` (number): Minimum share capital.
- `city` (string): City name — KRS records use uppercase, e.g. 'WARSZAWA', 'POZNAŃ'.
- `county` (string): County / powiat (lowercase).
- `currency` (string): Currency for monetary filters. Default: pln.
- `ebitda_max` (number): Maximum EBITDA.
- `ebitda_min` (number): Minimum EBITDA.
- `estimated_value_max` (number): Maximum Ohlson estimated equity value in PLN.
- `estimated_value_min` (number): Minimum Ohlson estimated equity value in PLN.
- `fields` (string): Response size. Default summary (name, NIP, KRS, location, PKD, latest financials, email/phone/website). contacts_only: name, NIP, KRS, city, email, phone, website. full: every company_search column p…
- `has_email` (boolean): true = only companies with email on record. Matching rows include contacts.email. Omit otherwise.
- `has_website` (boolean): true = only companies with website on record. Matching rows include contacts.website. Omit otherwise.
- `is_active` (boolean): true = active only, false = closed only. Omit for all.
- `krs` (string): KRS number of the company in the Polish National Court Register (10 digits).
- `legal_form` (string): Legal form fragment, e.g. 'spółka z o.o.' or 'akcyjna'.
- `limit` (integer): Max results (default: 10, max: 50).
- `name` (string): Company name, used when the KRS or NIP is not known.
- `nip` (string): Polish company tax number (NIP) of the business, 10 digits.
- `pkd` (string): Primary PKD code prefix, e.g. '46.90.Z' or '46'.
- `postal_code` (string): Postal code prefix, e.g. '00-9' or '61-'.
- `profit_max` (number): Maximum net profit.
- `profit_min` (number): Minimum net profit.
- `profit_operating_max` (number): Maximum operating profit (PLN). Omit if unused.
- `profit_operating_min` (number): Minimum operating profit (PLN). Negative allowed. Omit if unused.
- `region` (string): Voivodeship (lowercase), e.g. 'mazowieckie', 'wielkopolskie'.
- `registration_date_max` (string): Latest KRS registration date, YYYY-MM-DD (inclusive).
- `registration_date_min` (string): Earliest KRS registration date, YYYY-MM-DD (inclusive). For newly registered companies use today's date for both registration_date_min and registration_date_max.
- `revenue_max` (number): Maximum total revenue.
- `revenue_min` (number): Minimum total revenue.
- `sort_by` (string): Sort field (default: revenue_total). registration_date + sort_dir=desc lists the newest registrations first. revenue_growth_pct + sort_dir=desc lists the fastest-growing companies (y/y revenue growth…
- `sort_dir` (string): Sort direction (default: desc).
- `total_assets_max` (number): Maximum total assets.
- `total_assets_min` (number): Minimum total assets.
- `year` (integer): Filter to companies whose latest financial_period_to falls within this calendar year (e.g. 2024). Use only for sector/ranking browse — omit when looking up a company by name, KRS, or NIP.

### `get_company` (~146 tokens)

Get Company Profile

Get the registry profile of one Polish company: name, legal form, address, industry (PKD), share capital, representation rules, recent registry changes, VAT status and headline financials for the latest filed period. Identify the company by name, KRS number or company tax number (NIP). For earlier years or full statements use get_financials.

Input parameters:

- `krs` (string): KRS number of the company in the Polish National Court Register (10 digits).
- `name` (string): Company name, used when the KRS or NIP is not known.
- `nip` (string): Polish company tax number (NIP) of the business, 10 digits.

### `get_company_people` (~152 tokens)

Get Company People & Management

Get people associated with a company — management board, supervisory board, shareholders, proxies. Returns display names, role labels, and relationship types (management, supervisory, ownership, procuration). Identify by name, KRS, or NIP.

Input parameters:

- `krs` (string): KRS number of the company in the Polish National Court Register (10 digits).
- `name` (string): Company name, used when the KRS or NIP is not known.
- `nip` (string): Polish company tax number (NIP) of the business, 10 digits.
- `relationship_type` (string): Filter: management, supervisory (rada nadzorcza), ownership, procuration. Omit for all.

### `get_company_stock_market` (~185 tokens)

Get Warsaw Stock Exchange Data (GPW)

Get Warsaw Stock Exchange listing for a company — ticker, ISIN, market (GPW main / NewConnect / GlobalConnect), last close and change, market cap, shares outstanding, TTM EPS, TTM P/E (falls back to last annual filing), last quarterly results, next earnings date, dividend per share and yield. Quotes delayed ~15 minutes, in PLN. Snapshot plus a few recent daily bars — not full OHLCV history. Keyed by NIP. Identify company by name, KRS, or NIP.

Input parameters:

- `krs` (string): KRS number of the company in the Polish National Court Register (10 digits).
- `name` (string): Company name, used when the KRS or NIP is not known.
- `nip` (string): Polish company tax number (NIP) of the business, 10 digits.

### `get_company_court_gazette` (~129 tokens)

Get Court and Commercial Gazette (MSiG)

Get notices about a Polish company published in the Court and Commercial Gazette (Monitor Sądowy i Gospodarczy): calls to creditors, liquidation, mergers and transformations. Identify the company by name, KRS number or company tax number (NIP).

Input parameters:

- `krs` (string): KRS number of the company in the Polish National Court Register (10 digits).
- `name` (string): Company name, used when the KRS or NIP is not known.
- `nip` (string): Polish company tax number (NIP) of the business, 10 digits.

### `get_company_sanctions` (~128 tokens)

Get sanctions listing (MSWiA)

Official MSWiA sanctions listing for one company. Returns measures and legal grounds when the company is listed; null when it is not. Matched by KRS, NIP, or REGON. The same payload is included on get_company as sanctions.

Input parameters:

- `krs` (string): KRS number of the company in the Polish National Court Register (10 digits).
- `name` (string): Company name, used when the KRS or NIP is not known.
- `nip` (string): Polish company tax number (NIP) of the business, 10 digits.

### `get_company_debt_registry` (~114 tokens)

Get National Debt Register (KRZ)

Get insolvency and restructuring proceedings of a Polish company from the National Debtors Register (KRZ). Identify the company by name, KRS number or company tax number (NIP).

Input parameters:

- `krs` (string): KRS number of the company in the Polish National Court Register (10 digits).
- `name` (string): Company name, used when the KRS or NIP is not known.
- `nip` (string): Polish company tax number (NIP) of the business, 10 digits.

### `get_company_financial_supervision` (~152 tokens)

Get KNF Financial Supervision Register

KNF register (Polish Financial Supervision Authority): licences and entries of a financial company — banks, payment / e-money institutions, investment firms, insurers, lending institutions, agents. Returns entries with kind, KNF number, status, registration / decision / strike-off dates and services. Keyed by NIP; null when the company has no KNF entry.

Input parameters:

- `krs` (string): KRS number of the company in the Polish National Court Register (10 digits).
- `name` (string): Company name, used when the KRS or NIP is not known.
- `nip` (string): Polish company tax number (NIP) of the business, 10 digits.

### `get_company_secured_liabilities` (~147 tokens)

Get Secured Liabilities (Mortgages, Pledges)

Secured liabilities from the latest financial-statement notes (period ending 2025+): mortgages (hipoteki), registered / financial pledges (zastawy), transfers of ownership, assignments — with creditor, amount, secured debt, asset and land-register (KW) numbers. Keyed by KRS; null when nothing is disclosed.

Input parameters:

- `krs` (string): KRS number of the company in the Polish National Court Register (10 digits).
- `name` (string): Company name, used when the KRS or NIP is not known.
- `nip` (string): Polish company tax number (NIP) of the business, 10 digits.

### `get_company_beneficiaries` (~121 tokens)

Get Ultimate Beneficial Owners (CRBR)

Get CRBR beneficial owners for a KRS company. All names are returned (same as zarząd / wspólnicy). PESEL is never included (birth_year only). JDG are not in CRBR.

Input parameters:

- `krs` (string): KRS number of the company in the Polish National Court Register (10 digits).
- `name` (string): Company name, used when the KRS or NIP is not known.
- `nip` (string): Polish company tax number (NIP) of the business, 10 digits.

### `get_company_articles_of_association` (~159 tokens)

Get Articles of Association

Get the text of a Polish company's articles of association or statute from the court register document repository. Use for questions about share transfers, pre-emption rights, voting rights, management board powers or company duration. Identify the company by name, KRS number or company tax number (NIP).

Input parameters:

- `doc_id` (string): Optional: specific rar_doc_id. Omit for the latest articles / statute.
- `krs` (string): KRS number of the company in the Polish National Court Register (10 digits).
- `name` (string): Company name, used when the KRS or NIP is not known.
- `nip` (string): Polish company tax number (NIP) of the business, 10 digits.

### `get_usage` (~44 tokens)

Get Account Usage & Quota

Get current billing period usage and remaining quota — mcp_queries, api_requests, export_companies, ask_ai_credits, watchlist_companies. Includes limits and reset date.

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/contentwriterco-polish-kyb/api-mcp-kyb#diagnostics

## Score history

- 2026-10-24: 76
- 2026-10-23: 75
- 2026-10-22: 75
- 2026-10-21: 74
- 2026-10-20: 74
- 2026-10-19: 74
- 2026-10-18: 73
- 2026-10-17: 73
- 2026-10-16: 72
- 2026-10-15: 72
- 2026-10-14: 71
- 2026-10-13: 71
- 2026-10-12: 70
- 2026-10-10: 69

## Common questions

### What is the Polish KYB MCP server?

Polish KYB is an MCP server listed in the public MCP registry as io.github.ContentWriterco/polish-kyb. Know-your-business checks for Polish companies: KRS, owners, insolvency, sanctions, gazette notices. This page covers its hosted endpoint (https://compabase.com/api/mcp/kyb).

### Is the Polish KYB MCP server safe to use?

Polish KYB scores 76 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the Polish KYB MCP server expose?

Polish KYB exposes 12 tools: search_companies, get_company, get_company_people, get_company_stock_market, get_company_court_gazette, and 7 more. Their descriptions and schemas cost roughly 2,487 tokens of context every time the server is loaded.

### Does the Polish KYB MCP server require authentication?

No. We connected to Polish KYB without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the Polish KYB MCP server still maintained?

Polish KYB is still listed as active in the MCP registry. We last reached this channel on 24 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://compabase.com/api/mcp/kyb
- Repository: https://github.com/ContentWriterco/Polish-KYB-MCP
- Website: https://compabase.com/due-diligence
- Changelog RSS feed: https://verifymcp.io/servers/contentwriterco-polish-kyb/api-mcp-kyb.xml
- Changelog JSON feed: https://verifymcp.io/servers/contentwriterco-polish-kyb/api-mcp-kyb.json
- HTML version of this page: https://verifymcp.io/servers/contentwriterco-polish-kyb/api-mcp-kyb