Polish Open Data (unofficial)

Checks whether a bank account is on the Polish VAT whitelist (Biała Lista) for a taxpayer identified by NIP or REGON. Use before paying an invoice over 15,000 PLN; keep the returned request ID and time to document when the whitelist was checked and what it answered.

Checks pairs of NIP and bank account against the Ministry of Finance daily flat file of the VAT whitelist (plik płaski): offline, no request limit, many pairs at once (up to 50), and nothing about the pairs leaves this machine. Answers active, exempt or not_found; not_found means not found in the file, not proof that the account is absent from the whitelist. The first call for a date downloads about 250 MB and takes several minutes, much longer when the Ministry's server is slow. It does not return a request ID; for a check with a request ID use check_vat_bank_account.

Finds Polish cadastral parcels (działki ewidencyjne) with GUGiK's ULDK service, by exactly one of: a parcel ID (TERYT format, e.g. 146510_8.0507.41/1), WGS-84 coordinates (latitude + longitude; latitude comes first), an address, or a region name with a parcel number (e.g. "Krzewina 134", which can match several parcels). Returns the parcel ID, number, region, commune, county, voivodeship and the center of its bounding box in WGS-84; includeGeometry adds the full boundary as WKT in EPSG:4326 (longitude latitude order, as WKT writes it; can be long for a large parcel; not available for regionAndNumber searches). An address must resolve to a single address point to pick a parcel, otherwise the geocoder's candidates are returned. Data comes from EGiB via GUGiK. Never returns or accepts land-registry (KW) numbers or owner data.

Finds the coordinates of a Polish address (for example "Warszawa, Krucza 50") with GUGiK's address geocoder (UUG). Each match says whether it is an address, a street or a city: a partial address gives a street or city match whose point is only a representative point. Coordinates are WGS-84 (latitude, longitude). Public data from the national address register via GUGiK, based on EGiB and the address registers. Never returns or accepts land-registry (KW) numbers or owner data.

Returns a summary of the current National Court Register (KRS) extract: name, legal form, NIP/REGON, address, share capital, management and supervisory boards (names masked by the ministry), proxies, shareholders (companies and natural persons with masked names), and PKD activities. Reports removed entities with their removal date.

Looks up a Polish company or organisation by exactly one of NIP, REGON or KRS number. Combines the VAT whitelist (Biała Lista: VAT status, seat address, bank accounts) with the National Court Register (KRS: legal form, share capital, registration, removal). If the lookup is by NIP or REGON and KRS fails, the whitelist part is still returned, with the KRS error in warnings. Public registry data.

Answers what real estate sold for in a Polish area: the median and quartile price per square metre of flats (premises) and the single transactions, newest first, for premises, parcels or buildings. Data come from the RCN register (Rejestr Cen Nieruchomości) via GUGiK and are published with a delay of several months; the result says how old the newest transaction is. Single transactions are public register entries (address, price, deed number); buyers and sellers are shown only by kind. Informational, not a valuation. Search by exactly one of: an address (geocoded first; it must resolve to a single address point, otherwise the geocoder's candidates are returned), WGS-84 coordinates (latitude + longitude; latitude comes first) with a radius, or a powiat code. Never returns or accepts land-registry (KW) numbers or owner data.

Validates Polish identifiers offline (no network): NIP tax number, REGON, KRS number, NRB bank account, or land-registry (księga wieczysta, KW) number such as WA1M/00012345/1. Explains checksum failures and suggests likely typo fixes for KW numbers.