MAD Synapse · World

Current weather and hourly/daily forecast for any place name or lat,lon: temperature, feels-like, wind, gusts, rain, cloud, humidity, UV — up to 9 days. Forecast from the Norwegian Meteorological Institute (MET Norway), the same model data yr.no uses, worldwide. Place names are geocoded with OpenStreetMap. Times are UTC plus local time when tz is given (IANA, e.g. Australia/Sydney). Price: $0.001

Place name or address → coordinates (with city, state, country, postcode), or lat,lon → the nearest address. Up to 10 candidates. OpenStreetMap data via Photon. Returns OSM links so results can be checked. When to use: To turn names into coordinates; weather and sun_moon accept place names directly. Price: $0.001 per call (10 free/day; after that a payment-required result lists x402 options). Erro

Official exchange rates for 30 major currencies (European Central Bank reference rates): latest or any date since 1999, convert an amount, or a time series. Frankfurter API over ECB reference rates, published each working day ~16:00 CET. For crypto use crypto_price. Price: free. Errors: returns isError with a message for invalid input or an upstream failure (not charged).

Public holidays for 100+ countries for any year, whether today is a holiday there, and the next upcoming ones — including regional (state) holidays. Nager.Date open holiday data. Use for scheduling, market-closure awareness or delivery estimates. Price: free. Errors: returns isError with a message for invalid input or an upstream failure (not charged).

Current time in any time zones, convert a time between zones (DST-correct), and date arithmetic: add/subtract durations, days between dates, weekday, ISO week, Unix time. Computed locally from the IANA time-zone database — no rate limits, exact. Zones are IANA names (America/New_York, Asia/Tokyo, UTC). Price: free. Errors: returns isError with a message for invalid input or an upstream failure (no

Any country's essentials: capital, population, GDP and GDP per capita (World Bank), currencies, languages, calling code, internet TLD, time zones, driving side, borders, flag. Static facts from the world-countries dataset (no rate limits) plus the latest World Bank population and GDP figures. Price: free. Errors: returns isError with a message for invalid input or an upstream failure (not charged)

Earthquakes worldwide from the last hour to 30 days, filtered by minimum magnitude and optionally within a radius of a place — with depth, tsunami flag and USGS alert level. USGS real-time earthquake feeds (updated every minute). Price: free. Errors: returns isError with a message for invalid input or an upstream failure (not charged).

Sunrise, sunset, golden hour, twilight, day length and solar noon for any place and date — plus moon phase, illumination, moonrise and moonset. Astronomical calculation (SunCalc), exact and instant. Pass tz for local times. Price: free. Errors: returns isError with a message for invalid input or an upstream failure (not charged).