Korean listed-company disclosures from OpenDART: filings tagged original, correction or withdrawal, corrections linked to originals with term diffs, and a point-in-time view. GET /v1/corp?name=, /v1/filings, /v1/changes, /v1/asof with an 8-digit corp_code, or POST /v1/query with a question in Korean or English. Pay per request in USDC; no account, no API key.

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