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Official euro foreign exchange reference rates from the European Central Bank, published each working day around 16:00 CET for about 30 currencies. Use it to convert amounts between EUR and USD, GBP, JPY, CHF and others at the official daily rate. Optional base currency (cross rates are computed from the EUR rates) and a comma-separated list of symbols. Note: free of charge at ecb.europa.eu; you pay for access, not for the data.

Current ECB key interest rates: deposit facility rate, main refinancing operations rate and marginal lending facility rate, each with the date it took effect. Use it for euro interest rate context in finance, lending or treasury tasks. Note: free of charge at ecb.europa.eu; you pay for access, not for the data.

Recent earthquakes worldwide from the USGS real-time feeds: time, magnitude, place, depth, coordinates, tsunami flag and alert level. Filter by period (hour, day, week, month) and minimum magnitude class (significant, 4.5, 2.5, 1.0, all). Use it for hazard monitoring, travel or logistics checks and news context. Updated every few minutes.

Official Dutch school holiday dates per school year and region (north, middle, south) from the Dutch central government: autumn, Christmas, spring, May and summer holidays with start and end dates. Use it for travel, staffing, pricing or scheduling around Dutch school breaks.

Dutch address search and geocoding from the official BAG register via PDOK: free-text query (street, number, postcode, town) returns up to 5 matching addresses with postcode, house number, municipality, province and WGS84 coordinates. Use it to validate or geocode a Dutch address for delivery, property or location tasks.

Official monthly inflation (HICP, annual rate of change, all items) for EU countries, the euro area and the EU from Eurostat. Give a country code (NL, DE, FR, EA20, EU27_2020) and the number of recent months. Use it for price indexation, wage or rent adjustment and economic context. Eurostat data, CC BY 4.0; values unchanged.

World Bank development indicators for any country: GDP, population, inflation, unemployment, CO2 and 1,000+ more by indicator code (e.g. NY.GDP.MKTP.CD, SP.POP.TOTL, FP.CPI.TOTL.ZG). Returns the most recent yearly values. Use it for country comparisons, market sizing and economic background. World Bank data, CC BY 4.0.

Dutch statutory extrajudicial collection costs (buitengerechtelijke incassokosten, WIK scale, Besluit vergoeding voor buitengerechtelijke incassokosten art. 2): 15/10/5/1/0.5% over the principal in brackets, minimum EUR 40, maximum EUR 6,775, optional 21% VAT when the creditor cannot reclaim VAT. Use it to compute the legally allowed collection fee on a Dutch claim.

UK company register (Companies House): by company number or name. Returns name, number, status, type, incorporation and cessation dates, registered office address, SIC industry codes, previous names, accounts and confirmation statement due dates, and liquidation, insolvency and charges flags. Officers and persons with significant control are left out (personal data). Use it for KYC and supplier checks. Companies House data.

Maximum legal annual rent increase in the Netherlands for a given increase date and rental sector: social (regulated, per 1 July), mid-rent (regulated middle segment, per calendar year) or free sector (per calendar year, lower of CPI/CAO + 1). With the current rent it also gives the maximum new rent. 2019-2026, each figure with its official source.

Public holidays for the Netherlands, Belgium and Germany (nationwide) for any year 1900-2200, computed from the statutory rules and the Easter date: date, English and local name, with notes where a day is commonly worked. Use it for scheduling, delivery dates, payment terms and staffing in the Benelux and Germany.

Sunrise, sunset, solar noon, day length and the sun's elevation at noon for any latitude, longitude and date, computed with the NOAA solar algorithm (accurate to about a minute; times in UTC; polar day and night handled). Use it for solar panel and lighting schedules, photography, outdoor work planning and daylight-dependent automations.

Validate an IBAN: country, expected length, ISO 13616 mod-97 check digits, and the bank code part for common countries (NL, BE, DE, FR, GB, ES, IT, AT, CH, LU), plus the electronic and printed formats. Use it before sending a payment or storing bank details. Pure computation: the IBAN is not stored or forwarded, and no account existence check is made.

Current space weather from NOAA's Space Weather Prediction Center: the R (radio blackout), S (solar radiation) and G (geomagnetic storm) scales now and forecast for the next days, the latest planetary Kp index and the most recent alerts and warnings. Use it for GPS/GNSS, HF radio, satellite, drone, aviation and power-grid risk checks, or aurora chances.

US tides for a NOAA tide station: the latest observed water level (6-minute data) and today's and tomorrow's predicted high and low tides in metres relative to MLLW, times in UTC. Use it for boating, fishing, coastal work and shipping in US waters. Station id e.g. 9414290 (San Francisco).

Latest observation from a NOAA National Data Buoy Center station (US and international buoys and coastal stations): wind direction and speed, gusts, wave height and period, air and water temperature and pressure. Use it for sailing, surfing, offshore work and marine forecasts. Station id e.g. 46026 (San Francisco), 41001 (Cape Hatteras).

Latest US river and stream readings from the USGS water data API (15-minute data): discharge (cubic feet per second), gage height (feet) or water temperature for a USGS monitoring site. Use it for flood watching, paddling and fishing conditions, and water-dependent operations. Site number e.g. 01646500 (Potomac River near Washington DC). Data are provisional.

The most-read Wikipedia articles of a given day for a language edition (e.g. en, de, nl, fr, es, ja): rank, article title and views, with technical pages filtered out. A daily signal of what people worldwide are paying attention to. Use it for trend detection, news context and content planning. Defaults to yesterday (UTC).

Any time series from the ECB Data Portal by flow and series key (e.g. EXR/D.USD.EUR.SP00.A for USD/EUR, FM/B.U2.EUR.4F.KR.DFR.LEV for the deposit rate, ICP/M.U2.N.000000.4.ANR for euro area inflation), last N observations. Use it for euro area rates, money, banking and prices. Note: free of charge at ecb.europa.eu; you pay for access, not for the data.

Key facts about any thing, place, person or company from Wikidata, by name or Q-id: label, description, Wikidata id and the most useful properties (type, country, location, population, coordinates, inception, birth/death dates, occupation, website, headquarters, industry, revenue, employees, ticker). Use it for entity lookup, enrichment and disambiguation. CC0.

Daily US Treasury par yield curve rates from the US Department of the Treasury: 1-month to 30-year yields for the latest business days of the current month. Use it for interest rate context, discounting, bond and macro analysis. US public domain.

Current local time, UTC offset and daylight-saving status for any IANA time zone (e.g. Europe/Amsterdam, America/New_York, Asia/Tokyo), plus the next DST transition within a year. Computed from the IANA time zone database. Use it for scheduling across time zones and for agents that need a trustworthy clock.

Find cities and towns worldwide (all places with 15,000+ inhabitants, about 30,000) by name, optionally within a country: coordinates, country, region code, population, time zone and GeoNames id, largest first. Use it for geocoding place names, disambiguation and to get a time zone or coordinates for a city. GeoNames data, CC BY 4.0, refreshed nightly.

Airport lookup by IATA code (AMS), ICAO code (EHAM) or name/city: name, type, city, country, region, coordinates, elevation, scheduled service and both codes, for about 9,000 large, medium and IATA-coded airports worldwide. Use it for travel, logistics and aviation tasks. OurAirports data, public domain, refreshed nightly.