Convert a Gregorian date to other calendar systems and back: Islamic (both the tabular civil calendar and the Umm al-Qura variant), Hebrew, Japanese imperial era, Republic of China, Buddhist and Persian. Also computes Easter Sunday for a year in both the Gregorian and Julian reckonings. Uses the calendar support built into the runtime, with the algorithm named in every response.
# 1. Ask the endpoint what it costs (no payment, no wallet needed): curl -i -X GET 'https://api.duoleads.com/v1/time/calendar' # -> HTTP/1.1 402 Payment Required # the response carries the price, asset and pay-to address. # 2. Pay and retry with any x402 client: npx x402-fetch 'https://api.duoleads.com/v1/time/calendar'
Endpoint: https://api.duoleads.com/v1/time/calendar. Operated by api.duoleads.com, not by Animica. Price and availability were correct at the last probe on 2026-10-01 and are set by the operator, who may change them.
Validate an IBAN: length for its country, permitted character classes per field, and the ISO 7064 mod-97-10 check digits. Returns the verdict with a specific fa…
Construct an IBAN from a country code and the domestic account parts, computing the ISO 7064 mod-97-10 check digits. Takes either a single BBAN string or named …