Look up a Polish company by NIP (tax ID) on the Ministry of Finance VAT whitelist (Biała Lista). Returns the company name, VAT status, registered address, registration date and bank account numbers.

Args: nip: 10-digit Polish NIP. Spaces and dashes are fine — they are stripped.

Quick check: is this NIP registered as an active VAT payer in Poland? Returns a short, definitive yes / no / exempt answer plus the company name — useful for fast agent decisions such as "can I trust this invoice?".

Args: nip: 10-digit Polish NIP. Spaces and dashes are fine.

Get all current PLN exchange rates from the National Bank of Poland (Table A — EUR, USD, GBP, CHF, JPY, CZK and ~30 others).

Args: date: Optional ISO date (YYYY-MM-DD) for historical rates. NBP publishes rates only on banking days; a weekend date returns the most recent available table (the actual effective date is shown).

Get the official NBP mid-market exchange rate for a single currency against PLN. Tries Table A first and falls back to Table B for exotic currencies.

Args: currency_code: ISO 4217 code, e.g. "EUR", "USD", "GBP". date: Optional ISO date (YYYY-MM-DD) for a historical rate.

Convert an amount between PLN and another currency, or between two foreign currencies (via PLN as the pivot), using official NBP mid-market rates.

Args: amount: The amount to convert. from_currency: Source currency ISO code (e.g. "PLN", "EUR"). to_currency: Target currency ISO code (e.g. "GBP", "PLN"). date: Optional ISO date (YYYY-MM-DD) for historical rates.