Build on South Korea filings programmatically.

The FinancialReports API delivers DART-published South Korean filings through the same single REST surface, one x-api-key header, and one shared rate-limit bucket used across all covered markets. A Korea-only integration is a one-parameter filter (?country=KR) on the global filings endpoint — the same key that accesses Tokyo, Frankfurt, and London data retrieves Seoul data at no additional cost and under no separate rate limit. There is no separate KRX or FSS API endpoint, no Korea-specific authentication step.

For real-time pipelines the webhook channel is the recommended path: subscribe once, receive a POST with full filing metadata within roughly 60 seconds of DART publication. South Korea's quarterly reporting mandate produces one of the highest periodic-report throughput rates in Asia, with four mandatory quarterly report dates per year per KOSPI issuer stacking on top of the continuous current-report volume. The webhook payload shape is identical across all covered markets — a Korean Susi-bogo-seo material-event report arrives with the same JSON envelope as a German BaFin ad-hoc or a Hong Kong Chapter 14A circular — so your handler stays market-agnostic.

Filing bodies are available as JSON metadata, Markdown via /api/filings/{id}/markdown/, and original PDF. The Markdown rendering is particularly valuable for Korean content where DART PDFs contain complex table-heavy financial statements in Korean; the processed text extracts the narrative and structured content into a consistent, parseable form. K-IFRS financial data is exposed in the JSON metadata layer — because K-IFRS is fully converged with IFRS, financial line-items from Korean annual reports map directly to the same schema as European IFRS filings without reconciliation overhead, enabling genuinely cross-border financial databases that span TSE, KOSPI, and Euronext issuers under a single accounting-standard assumption.

Common API integrations for Korean data include backfilling KOSPI 200 consolidated financials for quant research (with particular depth in the semiconductor supply chain — Samsung Electronics, SK Hynix, and the ~40-company ecosystem below them), triggering on current reports for chaebol affiliate transactions and capital raises, monitoring quarterly earnings for the battery and EV supply-chain cluster (LG Energy Solution, Samsung SDI, SK Innovation, EcoPro), and constructing cross-border technology-sector databases that span Korean KOSDAQ names alongside NASDAQ and TSE Growth listings. Trial keys are available on request; the web product is free and publicly indexed for coverage verification.