Bitcoin address validator - checks base58check and bech32/bech32m checksums, returns network, address type (P2PKH, P2SH, P2WPKH, taproot) and encoding

Philadelphia SEPTA service alerts and detours across all modes, filterable by route

Text diff - line-by-line differences between two texts with added, removed and unchanged counts and similarity

Current local time, date, weekday and DST status for any IANA timezone or lat/lon, e.g. what time is it in Lisbon right now

Berlin (VBB) Real-Time Departures (U-Bahn, S-Bahn, tram, bus) — Transportation

Find overlapping working hours across 2 to 8 time zones for a date - UTC windows with local start and end in each zone and total overlap minutes

Live departures from any Norwegian stop through Entur - line, mode, destination, platform, scheduled and expected time, delay minutes and cancellations

Network peering profile by ASN from PeeringDB - operator, traffic ratio, peering policy, IPv4/IPv6 prefix counts, internet exchange ports and data centers

German Autobahn roadworks, closures and warnings by road - A1, A7, A8 and more with location, extent, start time and blocked status

Slug generator and case converter - slug, kebab, snake, camel, Pascal, constant and title case from any text

All U.S. State Department travel advisories, optionally filtered by level

US Treasury average interest rates on outstanding debt by security type - bills, notes, bonds, TIPS and FRNs with change versus the previous month

Open Trivia DB category ids and names, for filtering trivia questions

UK house price index by region from HM Land Registry - average price, annual and monthly change, sales volume and prices by property type and buyer type

UK property sale history by postcode (HM Land Registry) - price, date, address and property type

US Treasury auction results - high yield, bid-to-cover, offering size and dates for bills, notes, bonds, TIPS and FRNs, past and upcoming

US national debt to the penny - total public debt, public and intragovernmental split, with 30-day, 90-day and one-year change and daily growth

US Treasury official exchange rates - quarterly foreign currency units per US dollar for any country or currency, used in federal reporting

UK food hygiene rating lookup - 0 to 5 FHRS rating, inspection date, scores and local authority for restaurants and takeaways by name and town

UK street crime by location - crimes within a mile of any lat/lon with category breakdown, outcomes and hottest streets from police.uk