Polish KYB vs Polish Open Data (unofficial)
Polish KYB is an MCP server published by ContentWriterco. Marketplaces we read that list it: 1 (Official MCP Registry). Polish Open Data (unofficial) is an MCP server published by JacekSmi. Marketplaces we read that list it: 1 (Official MCP Registry). As of our marketplace pass on 2026-10-23. This pair was picked by a reader, not by our comparison rule, so search engines are asked not to index the page.
Where each is published
| Marketplace |   Polish KYB |  Polish Open Data (unofficial) |
|---|---|---|
| Official MCP Registry | Listed Version: 1.0.0 Forks (GitHub): 0 Stars (GitHub): 0 Not marked · First seen |
Listed Version: 1.6.0 Forks (GitHub): 0 Stars (GitHub): 0 Not marked · First seen |
Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.
The facts side by side
| Fact | Polish KYB | Polish Open Data (unofficial) |
|---|---|---|
| Marketplaces that list it | 1 | 1 |
| Stars (GitHub) | 0 | 0 |
| Forks (GitHub) | 0 | 0 |
| Last release (differs) | Not published | 2026-10-23 |
| Where it runs (differs) | Remote server (compabase.com/api/mcp/kyb) | On your machine (PolishOpenData.Mcp) |
| Transport (differs) | Streamable HTTP | stdio |
| Tools it declares | Not published | Not published |
| Environment variables it asks for (differs) | Not published | 2, secrets among them: 1 |
| Licence | Not stated | Not stated |
| Repository (differs) | github.com/contentwriterco/polish-kyb-mcp | github.com/jaceksmi/polishopendata |
| Changes in the last 7 days (differs) | 0 | 2 |
| First seen | 2026-10-11 | 2026-10-11 |
| Endpoint at the last check (differs) | Responded 2 days ago | no remote endpoint we check |
Lines where the two differ have a tinted background and bold values. Where the data itself says which value is better (more marketplaces, a larger figure of the same marketplace, a fresher release, a verified mark on a marketplace that lists both), the better one is also marked green with ▲ and the worse one red with ▼. Where it runs, the transport, the tools, the settings, hooks, the bundle's parts, the licence and the week's changes are marked only as different: more or fewer is not better in itself.
What each says it does
Polish KYB
Know-your-business checks for Polish companies: KRS, owners, insolvency, sanctions, gazette notices.
Polish Open Data (unofficial)
Polish registers: KRS, VAT, bank checks, parcels, geocoding, property prices (RCN), optional REGON.
How to run each
Polish KYB As a remote MCP server
claude mcp add --transport http polish-kyb https://compabase.com/api/mcp/kyb --header "Authorization: Bearer <YOUR_TOKEN>"Requires: Authorization header
Polish Open Data (unofficial)
No data for an automatic command: what its marketplaces declare does not say unambiguously how to connect it.
Requires: POLISHOPENDATA_REGON_KEY (secret)
Commands built only from what the marketplaces declare; the full set for every client is on each card.
Only Polish KYB has a remote endpoint we check. How we check endpoints
Tools each declares
Neither one's marketplaces publish a list of tools, so there is nothing to compare.
Settings each asks for
The marketplaces of Polish KYB publish no settings it asks for, so we do not compare settings.
What it can do: Polish KYB · What it can do: Polish Open Data (unofficial) · Compare two other plugins
Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.