mcp · Global

PolishOpenData

Typed .NET clients and an MCP server for Polish public registers: KRS, Biała Lista (VAT whitelist), NIP/REGON/KRS/NRB/KW validation

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Data offered docs-verified: company lookup in KRS · KRS extracts (current/full) · VAT whitelist (Biała Lista) status · bank-account check against the VAT whitelist (online and offline) · cadastral parcel lookup (GUGiK ULDK) · address geocoding to WGS-84 (GUGiK UUG) · offline validation of NIP, REGON, KRS, NRB and KW numbers
Coverage docs-verified: Poland
Update frequency docs-verified: VAT whitelist flat file: daily (Ministry of Finance)
Formats llm-inferred: MCP server (.NET 10 tool) · .NET libraries (NuGet) · JSON (KRS API responses)
Access llm-inferred: MIT licence (open source); no API key stated for the MCP tools listed in the entry; GUS REGON key (free, from GUS) needed only for the REGON library, which is not among the MCP tools

Use cases llm-inferred: Counterparty KYC check on suppliers or subcontractors before payment (NIP, VAT status, bank account) · Batch VAT whitelist and bank-account checks for a payment run using the offline check · Confirm a supplier's registered company details and KRS extract for tender or onboarding files · Geocode project addresses to WGS-84 and look up cadastral parcels for site investigation mapping
Audience llm-inferred: procurement and finance teams · GIS analysts · commercial and project managers at civils or environmental consultancies · developers building AI-assistant workflows

Constraints llm-inferred: Unofficial project; results are informational, not legal or tax advice, and the registers are authoritative · Poland-only data; the entry's regions field says 'Global', which conflicts with the Polish scope · No UK datasets, so it does not fit the UK-focused catalogue use case · Biała Lista has a daily request quota; reaching it blocks the whole IP address until midnight · Offline VAT check: first use per date downloads about 250 MB and builds a roughly 60 MB index · REGON needs the user's own GUS key; the public test environment serves anonymised, old data · Entry tool list omits the parcel and geocoding tools that the docs list under the MCP server · MCP transport (stdio or HTTP) is not stated in the docs

Licence: MIT
Authentication: API key via env: MY_APP_REGON_KEY, POLISHOPENDATA_REGON_KEY (auto-extracted from README)
GitHub stars: 0
Last commit: 15/10/2026
Last successful page check: 14/10/2026
Page health: healthy
Package: Not recorded
Verification: Not independently verified

Auto-extracted, unverified fields: tools, install, auth. Check upstream documentation.

Daily discovery 2026-10-16: GitHub search; verified via GitHub API. Tools/install/auth auto-extracted from README.

Metadata observed 14/10/2026 · daily-2026-10-16 (github-search)