Korean company data, in English

Identity, registration status, industry, address and month-by-month employment from government payroll records — for 152,367 Korean companies. Reachable by API, by MCP, or from your terminal.

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What a record looks like

$ curl -H "Authorization: Bearer $KCID_KEY" \
    https://notonlystock.com/korea/api/v0/companies/1248100998

{
  "brn": "1248100998",
  "name_ko": "삼성전자(주)",
  "name_en": "SAMSUNG ELECTRONICS CO,.LTD",
  "name_en_class": "official",
  "corporate_registration_no": "1301110006246",
  "business_status": "계속사업자",
  "established_date": "1969-01-13",
  "established_date_source": "fsc_estb",
  "ksic_code": "26519",
  "ksic_name_en": "Manufacture of video and other visual equipment",
  "address_en": "129, Samseong-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do",
  "ei_workers": 160917,
  "nps_latest": 125592,
  "nps_period": "2026-07",
  "nps_quality": "clean",
  "sources": {
    "name_ko": "kcomwel",
    "business_status": "nts",
    "corporate_registration_no": "fsc",
    "ksic_name_en": "kostat",
    "address_en": "derived",
    "nps_latest": "nps"
  }
}

Every value carries the source it came from. Figures are government records as of the dates shown — not estimates, and not an assessment of any company.

Coverage

152,367companies

36months of employment history

83.3%have the monthly series

0empty records

Korean for-profit corporate headquarters with 10 or more insured employees. The data guide lists every field, its source, and how complete it is — including the parts that are thin.

Why this and not a company registry

English first	Company names, addresses and industry codes rendered to the Korean government's own English standard — not machine-translated at read time.
Employment over time	National Pension subscriber counts by month, with hires and separations. Most sources publish one number; this is a series.
Sources attached	Each field says where it came from and when it was observed. Two dates that mean different things are labelled differently.
Built for programs	JSON, an MCP server for agents, and a CLI. No scraping, no login wall on the data you paid for.

For agents

npx korea-data-mcp        # tools: lookup · search · employment history · worksites

Set KCID_API_KEY and the server is ready. Each tool states its own cost so an agent can budget before it calls.

What it costs

Credits, not a subscription. A company record is 1, each search row is 1, an employment series is 5, a worksite list is 3. New accounts start with 50. Pricing →