60 APIs · 37 jurisdictions · no key in 39 of them
Public datano permission needed.
A catalog of government APIs from Poland, the European Union and dozens of other countries — described so that both a human and an AI agent can read it.
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APIs in the catalog
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Coverage
Thirty-two
Thirty-two
jurisdictions.
From the Polish VAT Register and KRS through Eurostat and EUR-Lex to company registers of Japan, Norway and Brazil. Click a tile to narrow the catalog.
Official sources only — government registers and public institutions. Every entry links to its source.
For AI agents
One file.
One file.
The whole catalog.
bash — otwarteapi.pl
ai-catalog.json — a machine-readable manifest
An agent fetches one file and knows what every API can do: endpoint, authentication, format, representative queries. This page reads exactly the same file — data and view never drift apart.
curl -s https://otwarteapi.pl/.well-known/ai-catalog.json | jq '.entries[].displayName'
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Search everything.
60 APIs · 37 jurisdictions · 26 with a live tester · updated 2026-08-24
- VAT Register (Biała Lista) — Ministry of Finance — Official REST API of Poland's Ministry of Finance to check VAT status (active/exempt/unregistered) and a business's bank accounts by tax ID (NIP). No key, no registration required.
- National Court Register (KRS) — Ministry of Justice API — Official API for retrieving current KRS extracts (legal form, PKD codes, share capital, address, representation) by KRS number. No key required.
- VIES — EU VAT number validation (European Commission) — European Commission service to validate a counterparty's EU VAT number from any member state. No key required.
- CEIDG — Data Warehouse (API v2) — Data on Polish sole proprietorships from CEIDG and Biznes.gov.pl. Requires free registration and a JWT key sent by email.
- REGON — BIR1.1 service (GUS) — SOAP web service of Poland's Central Statistical Office for retrieving REGON registry data. Requires a free key (USER_KEY) by email request.
- Exchange rates and gold prices — NBP API — Public REST API of the National Bank of Poland with current and historical exchange rates (tables A/B/C) and gold prices. No key required.
- Local Data Bank (BDL) — GUS API — Poland's largest statistical database (economy, society, environment) broken down by territory. REST, JSON/XML/JSONAPI. No key required, optional X-ClientId header for higher limits.
- Open Data — api.dane.gov.pl — Central open-data portal of Polish public administration — thousands of datasets from ministries and agencies, a unified REST API. No key required.
- IMGW-PIB public data (weather and hydrology) — Current and archival synoptic, hydrological data and weather warnings from Poland's Institute of Meteorology and Water Management. REST, JSON/XML/CSV, no key required.
- Warsaw open data — api.um.warszawa.pl — Real-time Warsaw city data: bus and tram positions, Park&Ride occupancy, city bike stations, air quality. Requires free registration and a key.
- e-Zamówienia Platform — public procurement API — Official API of Poland's Public Procurement Office for retrieving tender notices and procurement plans. High barrier to entry: formal registration, OAuth2 Client Credentials, an integration test report is required.
- skanfirmy.pl — MCP server for company verification — Stateless MCP server (JSON-RPC 2.0 over Streamable HTTP) with 9 tools to verify Polish companies: VAT status, bulk lookup of up to 30 tax IDs in one call, REGON register (GUS, sole traders too), KRS data, White List bank account, tax micro-account, 2025 PKD codes, statutory/commercial interest, otwarteAPI catalog search. Combines data from the VAT Register (Ministry of Finance), KRS (Ministry of Justice) and GUS in one call. No key required. Also available as plain REST GET: skanfirmy.pl/nip/{number}, skanfirmy.pl/regon/{number} and skanfirmy.pl/vies/{country}/{number}.
- European Central Bank — SDMX 2.1 RESTful (Statistical Data Warehouse) — ECB statistical data: reference euro rates, interest rates, inflation, euro area monetary aggregates. SDMX 2.1 standard, results in XML/JSON/CSV. No key required.
- Eurostat — REST API for EU statistics — Official statistics for all EU countries (economy, demographics, labour market, environment) in a single SDMX-compliant REST API. No key required.
- EUR-Lex / CELLAR — EU legal acts — Full text and metadata of all EU legal acts (regulations, directives, CJEU rulings) as RDF data, available via SPARQL and REST. No key required, limit of 5 concurrent requests, 60s timeout.
- data.europa.eu — the European open data portal — Central catalog of open data from all EU countries and institutions — hundreds of thousands of datasets. Search API (REST) and SPARQL over full RDF metadata. No key required.
- GENESIS-Online — Federal Statistical Office (Germany) — REST/JSON API of Germany's Federal Statistical Office (Destatis) for the GENESIS-Online database — Germany's economic, demographic and social data. No key, no registration required.
- Sirene API — INSEE (France) — Official API of France's business and establishment registry Sirene (SIREN/SIRET), run by INSEE. Free, requires account registration and OAuth2 authentication, limit 30 requests/min.
- ARES — Register of Economic Subjects (Czech Republic) — Official registry of Czech economic entities (Czech equivalent of REGON/CEIDG), run by the Czech Ministry of Finance. REST/JSON, data by IČO number (Czech equivalent of a business ID). No key required, open CORS.
- CBS StatLine Open Data — Statistics Netherlands — OData REST API of the Dutch statistical office (CBS) for the StatLine database — the Netherlands' economic, demographic and social data across thousands of tables. No key required, open CORS.
- INE Tempus3 — National Statistics Institute (Spain) — REST API of Spain's National Statistics Institute (INE) for the Tempus3 database — Spain's full official statistics (demographics, economy, labour market, prices). Returns JSON, no key required, open CORS.
- US Census Bureau — U.S. statistics — The U.S. Census Bureau — American demographic and economic data. REST/JSON, free API key required.
- data.go.kr — South Korea public data portal — South Korea's public data portal (data.go.kr) — thousands of services from public institutions. REST/JSON, free key per service.
- data.gov.in — India Government open data portal — India's government open-data portal (OGD Platform) — datasets from ministries. REST/JSON, free API key required.
- Zefix — Swiss central business index — Switzerland's central business index (Zefix) — data by IDE/UID number or name. REST/JSON, free account required.
- CVR — Danish Central Business Register (Virk) — Denmark's central business register (CVR, Virk) — data by CVR number. REST/JSON, free system registration required.
- CRO — Irish company register (OpenServices) — Ireland's company register (CRO OpenServices) — data and filings by number. REST/JSON, free registration required.
- KVK — Dutch Chamber of Commerce (Trade Register) — The Dutch trade register (KVK, Handelsregister) — company data by KVK number. REST/JSON, registration and key required.
- ABN Lookup — Australian business register (ABR) — Australia's official business register (ABN Lookup, ABR) — data and status by ABN. REST/JSON, free identifier (GUID).
- NZBN — New Zealand business register — The official New Zealand business register (NZBN, MBIE) — data by NZBN number. REST/JSON, free API key.
- Houjin Bangou — Japanese Corporate Number register — The official Japanese Corporate Number register (NTA) — name and address by number. REST/JSON, free application ID.
- gBizINFO — Japanese corporate information — Japan's corporate information register (gBizINFO, METI) — data linked to the corporate number. REST/JSON, free token.
- Companies House — UK company register — The UK's official company register (Companies House) — data, officers and filings by company number. REST/JSON, free API key.
- GCIS OpenData — Taiwan company register (MOEA) — Taiwan's official company register (GCIS/MOEA) — data by registration number. REST/JSON, no key (called server-side).
- Uzņēmumu reģistrs — Latvian Register of Enterprises (data.gov.lv) — Latvia's Register of Enterprises as open data on data.gov.lv (CKAN). REST/JSON, no key (no CORS, called server-side).
- datos.gob.ar — Argentina Government open data portal — Argentina's government open-data portal (CKAN). REST/JSON, no key (no CORS, called server-side).
- data.gov.hk — Hong Kong Government open data portal — Hong Kong's official government open-data portal (CKAN). REST/JSON, no key (no CORS, called server-side).
- USAspending.gov — U.S. federal spending — Keyless REST API of U.S. federal spending — contracts, grants, agency budgets. JSON, no key, open CORS.
- US Federal Register — U.S. government daily journal — Keyless REST API of the U.S. Federal Register — rules, notices, regulations. JSON, no key, open CORS.
- IBGE data services — Brazil statistics — Keyless REST API of Brazil's statistics office (IBGE) — statistical, territorial and demographic data. JSON, no key, open CORS.
- datos.gov.co — Colombia Government open data portal — Colombia's government open-data portal (Socrata) — thousands of datasets. REST/JSON, no key, open CORS.
- datos.gob.cl — Chile Government open data portal — Chile's government open-data portal (CKAN) — datasets from public institutions. REST/JSON, no key, open CORS.
- data.gov.my — Malaysia Government open data portal — Malaysia's official government open-data portal (OpenDOSM) — keyless REST API. JSON, no key, open CORS.
- World Bank Open Data — global development indicators — World Bank open data — development indicators (GDP, demographics, poverty) for every country. REST/JSON, no key, open CORS.
- Open Government Canada — Canadian Government open data portal — Canada's central government open-data portal (CKAN) — tens of thousands of datasets, bilingual. REST/JSON, no key (no CORS, called server-side).
- data.gov.il — Israel Government open data portal — Israel's central government open-data portal (CKAN) — thousands of datasets, including the company registry (ICA). REST/JSON, no key, open CORS.
- data.gov.sg — Singapore Government open data portal — Singapore's official government open-data portal (Open Data API v2) — datasets from government agencies. REST/JSON, no key, open CORS.
- data.gov.au — Australian Government open data portal — Australia's central government open-data portal (CKAN) — over 140k datasets from federal and state bodies. REST/JSON, no key, open CORS.
- Enhetsregisteret — Norwegian entity registry (Brønnøysund) — Official Norwegian registry of all entities (companies, organisations, public bodies) — data by organisation number. REST/JSON, no key, open CORS.
- YTJ / PRH avoindata — Finnish business register — Official Finnish business register (YTJ) as PRH open data — company data by Business ID (Y-tunnus). REST/JSON, no key, open CORS.
- e-Business Register (Ariregister) — Estonian business register (RIK) — Official Estonian business register (Ariregister) run by RIK — company data by registry code or name. REST/JSON, no key, open CORS.
- GLEIF — global Legal Entity Identifier (LEI) registry — Global open registry of Legal Entity Identifiers (LEI) maintained by GLEIF — data by LEI code or name, complementary to national registers. REST/JSON, no key, open CORS.
- SEC EDGAR — U.S. public company filings — Official U.S. SEC EDGAR data — filings and financial data for U.S. public companies by CIK number. REST/JSON, no key (a User-Agent header is required, so it is called server-side).