korea-data-mcp: open-source MCP server exposes 92 API quirks to query real Korean company headcounts
youngtipted · reddit · 2026-11-12
An open-source MCP server, korea-data-mcp, wraps Korean public data (corporate filings, stock prices, real estate, statutes, Bank of Korea stats) and handles the official APIs' traps. v0.1.9 adds the National Pension Service workplace registry — enrolled members per workplace, the closest public proxy for company headcount, with a 12-month history.
The raw API is full of traps: name search is raw substring matching ("Samsung Electronics" returns 1,739 records, mostly cafés and daycare centers); each month is a separate record that can't be filtered; only the first 6 digits of business registration numbers are published; contributions billed aren't salaries. The tool joins the business number from DART, folds monthly records, and labels short-term sites — e.g. Hyundai Motor went from 68,673 (Oct 2025) to 66,776 (Sep 2026).
All 92 documented quirks were tested against real responses. Ships as a single Go binary, one-click install in Claude Desktop, local, no telemetry, Apache 2.0.
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