Polish KYB MCP Server

Verify Polish business partners in one place: registry profile, management and shareholders, beneficial owners, insolvency and restructuring, court gazette notices, sanctions lists and financial supervision licences.

Remote MCP server (Streamable HTTP), read-only, hosted by Compabase.

https://compabase.com/api/mcp/kyb

Tools

Tool	What it does
`search_companies / get_company`	Find the company and read its KRS registry profile and VAT status.
`get_company_people / get_company_beneficiaries`	Management board, supervisory board, shareholders and beneficial owners (CRBR).
`get_company_debt_registry`	Insolvency and restructuring proceedings (KRZ).
`get_company_court_gazette`	Court and Commercial Gazette (MSiG) notices.
`get_company_sanctions / get_company_financial_supervision`	Sanctions lists and KNF financial supervision register.
`get_company_secured_liabilities / get_company_articles`	Secured liabilities and articles of association.

Example prompts

Run a KYB check on the company with NIP 5260250995.
Who are the beneficial owners of KRS 0000028860?
Is this company in insolvency proceedings or on a sanctions list?

Authentication

Sign in with your Compabase account (OAuth) in clients that support it, or send an MCP key: create one at https://compabase.com/integrations?tab=mcp and pass it as Authorization: Bearer mcpk_… or append ?apiKey=mcpk_… to the URL. Queries count toward your Compabase plan.

Setup

Claude (claude.ai, Desktop): Settings → Connectors → Add custom connector → paste the URL above (add ?apiKey=mcpk_… if you use a key).

Cursor / VS Code / Windsurf (mcp.json):

json

{
  "mcpServers": {
    "polish-kyb": {
      "url": "https://compabase.com/api/mcp/kyb",
      "headers": { "Authorization": "Bearer mcpk_YOUR_KEY" }
    }
  }
}

ChatGPT: Settings → Apps → Developer mode → Create → paste the URL.

About

Part of the Compabase MCP family. Full Compabase MCP (all Polish company data tools): https://compabase.com/api/mcp.

Questions: contact@compabase.com

Gemini CLI

bash

gemini extensions install https://github.com/ContentWriterco/Polish-KYB-MCP

Gemini CLI asks for your Compabase MCP key during installation (create one at https://compabase.com/integrations?tab=mcp).

Setup guides

Step-by-step setup guides for Claude, ChatGPT, Gemini, Grok, Le Chat, Perplexity, Cursor, VS Code and Claude Code: https://compabase.com/docs/mcp/connect/

Requirements