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🇰🇷 Korea DART OpenDART — KOSPI & KOSDAQ Filings

Korea's SEC EDGAR equivalent — institutional disclosures from every KOSPI, KOSDAQ, and KONEX issuer, delivered as clean JSON.

DART (전자공시시스템 — Korea Financial Supervisory Service's electronic disclosure system) is the legal source-of-record for every Korean listed company. This actor wraps the official OpenDART REST API so you can pull issuer filings, major-event reports, capital changes, and M&A disclosures by date range, issuer, or category without writing any glue code.

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

What you get

Each filing record contains:

Use cases

• Korean equity event-driven traders — monitor M&A filings, tender offers, major-event reports (주요사항보고서) within minutes of disclosure
• Activist / hedge fund Asia desks — track 5%+ ownership filings (대량보유보고서) and insider transactions (임원·주요주주특정증권등소유상황보고서)
• Compliance / KYC analysts — pull regular reports (사업보고서, 분기보고서, 반기보고서) on KOSPI200 / KOSDAQ150 constituents for due diligence
• Macro researchers — monitor capital-raise activity, convertible bond issuance (전환사채), and rights offerings (유상증자) for liquidity-cycle signals
• Foreign investor research — Korean-equity research without paying for Refinitiv Eikon Korea or Bloomberg Korea-Country-Pack

Input

How to get a free OpenDART key (60 seconds)

1. Open https://opendart.fss.or.kr/uss/umt/cmm/EgovMberInsertView.do
2. Click 회원가입 (Sign Up) — give email, name, organization. No payment, no credit card.
3. Confirm via the verification email.
4. Log in → 인증키 신청/관리 (API key request) → submit application — keys are auto-approved in seconds.
5. Paste the 40-char crtfc_key into the opendart_api_key input field.

Why we don't supply a shared key: OpenDART's Terms of Service §5 require each downstream consumer to register their own key. Sharing keys would (1) violate ToS, (2) hit the 20,000/day cap quickly with multiple users on one key, and (3) make rate-limit debugging impossible. Each NexGenData buyer using their own key gets the full 20,000-call/day quota.

Rate limit

OpenDART enforces 20,000 API calls per key per day (resets at 00:00 KST). This actor:

• Paginates list.json at 100 results per page (so 100 filings = 1 API call)
• Stops at 19,900 calls as a local guard (leaves headroom for incidental calls)
• Surfaces OpenDART's status 020 (quota exceeded) cleanly in the output dataset rather than crashing

Worst-case math: a year-long full-corpus sweep (~3,000 filings/day × 365 ≈ 1.1M filings) needs ~11,000 calls — well under the 20K daily cap. Most use cases consume <100 calls/run.

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)"
}

OpenDART category codes (pblntf_ty) reference

The filing_type input maps regular_report → A, major_event → B, capital_change → C, M&A → D. Choose all to fetch every category.

한국어 설명

한국 금융감독원의 DART(전자공시시스템)에서 KOSPI 및 KOSDAQ 상장 기업의 공시 정보를 수집합니다. 정기 보고서, 주요 사항 보고서, M&A 공시 등을 한국어 원본 그대로 구조화된 데이터로 제공합니다.

주요 용도:

• 한국 주식 시장 이벤트 모니터링
• 코퍼레이트 거버넌스 분석
• M&A 트래킹
• 외국인 투자자 정보 분석

필수 입력

• opendart_api_key — OpenDART에서 발급받은 본인의 인증키 (무료, 가입 후 즉시 발급). 본 액터는 ToS 제5조에 따라 공유 키를 제공하지 않으며, 각 사용자가 본인의 인증키를 등록해야 합니다.

선택 입력

• corp_name_filter — 회사명 부분 일치 검색 (예: 삼성, 현대, 카카오)
• corp_code_filter — DART 고유번호 (8자리)
• filing_type — 공시 유형 필터
• date_from / date_to — 조회 기간 (기본 최근 30일)
• max_filings — 최대 결과 수 (기본 100)

사용량 제한

OpenDART는 인증키당 일일 20,000회 호출 제한이 있습니다. 본 액터는 안전 마진을 위해 19,900회에서 중단합니다.

Related Actors — Asia-Pacific Disclosures Cluster

Cross-jurisdiction event-driven traders typically pair DART with:

Additional Korea + APAC cluster actors (currently private, publish queue): korea-kind-disclosures (KRX exchange-side announcements), hkex-news-announcements (Hong Kong Exchange). They will appear in this table once public.

Legal posture

• DART filings are mandated public disclosure under FSCMA §159 (자본시장과 금융투자업에 관한 법률).
• OpenDART is FSS's official open-data wrapper (Public Data Portal API #15044596).
• No commercial-use restriction (OpenDART ToS §3 permits research, journalism, and commercial intelligence).
• Each consumer registers their own free auth key (OpenDART ToS §5).
• Rate limit: 20,000 calls/day per key.

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