KoreaKit

Checks and payment terms on this page refer to the first endpoint's example. Other endpoints have not been checked individually.

Base URLhttps://koreakit.celee.workers.dev/v1

• GET/business-days/count$0.003Count South Korea business days (영업일) between two dates, inclusive of both ends, excluding weekends and Korean public holidays.
  2 parameters and an example

  • toquery, required2026-09-30YYYY-MM-DD (inclusive)
  • fromquery, required2026-09-21YYYY-MM-DD (inclusive)

  curl -i 'https://koreakit.celee.workers.dev/v1/business-days/count?to=2026-09-30&from=2026-09-21'

• GET/holidays$0.003South Korea public holidays for a year (2015-2050): 설날·추석 (lunar), 대체공휴일 substitute holidays, election days, temporary holidays, and the 2026 additions 노동절 (May 1) and 제헌절 (Jul 17). Korean and English names. KASI lunar data.
  1 parameter and an example

  • yearquery, required2026Gregorian year, 2015-2050

  curl -i 'https://koreakit.celee.workers.dev/v1/holidays?year=2026'

• GET/holidays/check$0.003Check whether a date is a South Korea public holiday, weekend, or business day (영업일), with holiday names. Includes 대체공휴일 and 2026 노동절·제헌절.
  1 parameter and an example

  • datequery, required2026-05-01YYYY-MM-DD

  curl -i 'https://koreakit.celee.workers.dev/v1/holidays/check?date=2026-05-01'

• GET/lunar/from-solar$0.003Convert a Gregorian date (양력) to the Korean lunar calendar date (음력), leap-month flag and 간지 names, KASI standard.
  1 parameter and an example

  • datequery, required2026-09-25Gregorian date YYYY-MM-DD

  curl -i 'https://koreakit.celee.workers.dev/v1/lunar/from-solar?date=2026-09-25'

• GET/lunar/to-solar$0.003Convert a Korean lunar calendar date (음력) to the Gregorian date (양력) with 간지 (sexagenary) names, KASI standard. For birthdays, 제사, traditional events.
  2 parameters and an example

  • datequery, required2026-08-15Lunar date YYYY-MM-DD
  • leapqueryfalsetrue if the lunar month is a leap month (윤달)

  curl -i 'https://koreakit.celee.workers.dev/v1/lunar/to-solar?date=2026-08-15&leap=false'

• GET/text/amount$0.003Write a number as a Korean amount in words: spoken form, formal 일금…원정 contract form for invoices and contracts, and 갖은자 hanja (壹貳參). Up to 20 digits.
  1 parameter and an example

  • nquery, required1234500Non-negative integer, commas allowed

  curl -i 'https://koreakit.celee.workers.dev/v1/text/amount?n=1234500'

• GET/text/josa$0.003Choose the grammatically correct Korean particle (은/는, 이/가, 을/를, 과/와, 으로/로 …) for a word, number or acronym, based on its final consonant (받침). For templated Korean text generation.
  2 parameters and an example

  • josaquery, required으로Either form of the particle, e.g. 을 or 을/를
  • wordquery, required서울Word, number or acronym

  curl -i 'https://koreakit.celee.workers.dev/v1/text/josa?josa=%EC%9C%BC%EB%A1%9C&word=%EC%84%9C%EC%9A%B8'

• GET/text/romanize$0.003Romanize Korean (Hangul) text with the official Revised Romanization rules incl. sound changes (종로 jongno, 신라 silla). mode=name for personal names with common surname spellings (Kim, Lee, Park).
  2 parameters and an example

  • modequerygeneralgeneral (default) or name
  • textquery, required경복궁Korean text, up to 2000 chars

  curl -i 'https://koreakit.celee.workers.dev/v1/text/romanize?mode=general&text=%EA%B2%BD%EB%B3%B5%EA%B6%81'

• GET/validate/brn$0.003Validate the checksum of a South Korea business registration number (사업자등록번호, 10 digits) and classify the entity type (individual, corporation HQ/branch, non-profit). Offline checksum only.
  1 parameter and an example

  • numberquery, required220-81-6251710 digits, hyphens allowed

  curl -i 'https://koreakit.celee.workers.dev/v1/validate/brn?number=220-81-62517'

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