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🇰🇷 Korea DART OpenDART API — KOSPI & KOSDAQ Filings

Pull KOSPI, KOSDAQ, and KONEX corporate filings straight from Korea's DART electronic disclosure system (전자공시시스템) through the official FSS OpenDART REST API — Korea's SEC EDGAR equivalent for regulator-filed disclosures. Get annual/quarterly regular reports (정기공시), major-event reports (주요사항보고), capital-change and issuance filings, and 5%+ ownership disclosures. Filter by issuer (corp_code or Korean name), date range, and category; every row carries the canonical rcept_no and a deep link back to the DART viewer. Bring your own free OpenDART key (FSS caps free keys at 20,000 calls/day).

• ✅ Official FSS open-data API — full corpus, not a fragile scraper
• ✅ KOSPI + KOSDAQ + KONEX coverage
• ✅ Korean original content preserved (corp_name, filing titles) + English names where registered
• ✅ Filter by date range, issuer (corp_code or name), and filing category
• ✅ Bring-your-own free OpenDART auth key (per FSS Terms of Service)

DART vs KIND — which one do I need? This actor reads DART, the regulator's system run by the Financial Supervisory Service (FSS) via the OpenDART REST API. If you want the exchange-side timely and voluntary disclosures that companies file directly with the Korea Exchange, use korea-kind-disclosures instead. Many event-driven desks run both.

Use cases

• Cross-border equity research desks — track Korean issuer event flow (major events, M&A, capital changes) into one structured dataset keyed on rcept_no.
• Compliance / AML teams — monitor major-event and 5%+ ownership filings (대량보유보고서) for Korean counterparties during onboarding and surveillance.
• Quant / data teams — backfill KOSPI/KOSDAQ disclosure metadata for factor research and event studies.
• Activist / event-driven Asia desks — watch tender offers and insider-transaction reports (임원·주요주주 소유상황보고) within minutes of disclosure.

Input

Example input

{
"opendart_api_key":"YOUR_OPENDART_CRTFC_KEY",
"corp_name_filter":"삼성",
"filing_type":"major_event",
"date_from":"2026-05-01",
"date_to":"2026-05-31",
"max_filings":100
}

Example output (one row)

{
"rcept_no":"20260530000234",
"corp_code":"00126380",
"corp_name":"삼성전자",
"corp_name_en":"SAMSUNG ELECTRONICS CO.,LTD",
"stock_code":"005930",
"filing_title":"[기재정정]사업보고서 (2025.12)",
"filing_type_classified":"regular_report",
"filing_type_code":"A",
"filing_date":"20260530",
"filer_name":"삼성전자",
"market_segment":"KOSPI",
"opendart_url":"https://dart.fss.or.kr/dsaf001/main.do?rcpNo=20260530000234",
"filing_summary":"삼성전자 (KOSPI) — [기재정정]사업보고서 (2025.12)"
}

How to get a free OpenDART key (60 seconds)

1. Open opendart.fss.or.kr sign-up.
2. Click 회원가입 (Sign Up) — email, name, organization. No payment, no card.
3. Confirm via the verification email.
4. Log in → 인증키 신청/관리 (API key request) → submit — keys auto-approve in seconds.
5. Paste the 40-char crtfc_key into the opendart_api_key input.

Why we don't supply a shared key: OpenDART's Terms of Service require each downstream consumer to register their own key. Your own key gives you the full 20,000-call/day quota and clean rate-limit behavior.

OpenDART category codes (pblntf_ty) reference

filing_type maps regular_report → A, major_event → B, capital_change → C, M&A → D. Use all for every category.

FAQ

Do I need an OpenDART API key? Yes — register free at opendart.fss.or.kr; same-day (seconds) approval. The actor uses your own crtfc_key.

What's the difference between DART and KIND? DART is the FSS regulator system (this actor, via the OpenDART REST API). KIND is the KRX exchange portal. Some documents file to both; voluntary disclosures often go to KIND only.

Which markets are covered? KOSPI, KOSDAQ, and KONEX (plus ETC).

Can I filter to one company? Yes — by 8-digit corp_code_filter or a Korean-name substring in corp_name_filter.

What's the rate limit? FSS caps free keys at 20,000 calls/day (resets 00:00 KST). The actor paginates 100 filings per call and guards at 19,900.

한국어 설명

한국 금융감독원(FSS)의 DART(전자공시시스템)에서 공식 OpenDART REST API를 통해 KOSPI·KOSDAQ·KONEX 상장 기업의 공시를 수집합니다. 정기보고서, 주요사항보고, 발행공시(자본변동), 5%+ 지분공시 등을 한국어 원본 그대로 구조화된 JSON으로 제공합니다. 회사명·고유번호·기간·유형으로 필터링하며, 각 행에는 rcept_no와 DART 원문 링크가 포함됩니다. OpenDART 무료 인증키(일 20,000회)가 필요합니다.

DART vs KIND: DART는 금융감독원(규제기관) 시스템이고, KIND는 한국거래소(KRX) 시스템입니다. 거래소 공시는 korea-kind-disclosures를 사용하세요.

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