{"slug": "show-hn-finbridge-korean-stock-market-data-for-ai-agents-mcp", "title": "Show HN: FinBridge – Korean stock market data for AI agents (MCP)", "summary": "FinBridge, a new MCP-based data service, launched on Hacker News to provide AI agents with normalized Korean and U.S. stock market data, covering 11,920 listings and 1,354 Korean ETFs. The service pulls primary-source data from OpenDART, EDGAR, data.go.kr, and the St. Louis Fed, offering 33 MCP tools with a 5-minute refresh for new filings, and is free without signup. It aims to fill the gap in Korean market coverage for AI agents, which previously had to rely on expensive tiered services or manual translation.", "body_md": "# Your model knows\n\nNVIDIA. It guesses\n\nabout SK Hynix.\n\nAsk it about both.\n\n“Find KOSDAQ names above RS 90 that pass the trend template.” Ask Claude and it screens every Korean listing to answer, and reads filings and financials on both sides of the Pacific — the same fields, the same units.\n\n**No signup**, no login · Quotes, financials and filings\n\n**stay free**\n\n**HD Hyundai Electric** 267260 · KOSPI\n\n**438,000**▲ 4.21%\n\n**Vertiv** VRT · NYSE\n\n**121.44**▲ 2.03%\n\n**Samsung Electronics** 005930 · KOSPI\n\n**58,900**▼ 1.34%\n\n**Palantir** PLTR · NASDAQ\n\n**142.10**▲ 3.58%\n\n**Ecopro BM** 247540 · KOSDAQ\n\n**96,700**▼ 0.62%\n\n**Today’s read** sample AI commentary\n\n**HD Hyundai Electric** holds RS 96 and has entered its third VCP contraction, volume drying up\n\n**4% below the 52-week high**. All eight Minervini trend-template conditions are met.\n\n**Samsung Electronics** lost its 50-day line and dropped out of the trend template — RS is still 71, above its market, but it is the only name here showing trend damage.\n\n`⌘K`\n\n## “Looks interesting. Thirty minutes to find out.”\n\nA Korean name catches your eye. Earnings trend, valuation, insider activity, peer comparison — each one lives somewhere else, and half of it is in Korean. So you **skip it and move on.**\n\n- Your screener stops at the U.S. border\n- DART → filings in Korean, tables read by hand\n- Earnings dates → guessed from news\n- Peer comparison → assembled in a spreadsheet\n- The tier that includes Korea → $149 / month\n\n- “Analyze this name” —\n**one line** - Financials, technicals, insiders, 13F\n**at once** - Earnings dates\n**as the company filed them** - Peer comparison\n**automatic** - Korea and the U.S. on the\n**same schema**\n\n**11,920** KR + US listings\n\n**1,354** Korean ETFs\n\n**33** MCP tools\n\n**5 min** new-filing refresh\n\n## Two markets, one schema.\n\nKorean and U.S. listings are ingested and normalized every night into a single SQLite database, so an agent can read both markets’ filings and financials — and screen the Korean market — through one connection instead of two vendors.\n\n## Primary sources only.\n\nFilings, financials, macro series and prices are pulled straight from the issuing authority and normalized here. All of it is redistributable public data, so the licensing is clean.\n\n**OpenDART** Korean filings · financials · insiders\n\n**EDGAR** U.S. filings · XBRL · Form 4 · 13F\n\n**data.go.kr** Korean prices · ETFs · KOSPI index\n\n**St. Louis Fed** Macro · rates · FX\n\n**Exchanges** Crypto quotes · venue comparison\n\n### Trend and relative strength\n\nSMA, EMA, RSI, MACD, Bollinger and ATR — plus an **RS percentile against a name’s own market** and the Minervini trend template, computed daily for every Korean listing.\n\n### Deep financial history\n\nAnnual and quarterly financials normalized back to 2008 in the U.S. and 2014 in Korea. P/E, P/B, ROE, debt ratio and 3-year CAGR in one view. Korean price history runs from 2020, corporate-action adjusted by us. U.S. price series are deliberately not part of the product — we serve only data we may redistribute, so the licensing stays clean.\n\n### Insider transactions\n\nSEC Form 4 (code P buy / S sell) alongside Korean executive and major-shareholder ownership changes, split into buys and sells — the same footprints, on both markets.\n\n### Institutional 13F holdings\n\n“What did Berkshire add last quarter,” answered from the filing itself. Positions and value changes parsed straight out of 13F-HR.\n\n### Filings as a news feed\n\nU.S. 8-K and Korean material-event reports in one chronological feed. You can see what happened without paying for a news API.\n\n### Safe direct queries\n\nRun **SELECT-only** queries against the normalized database. Whitelisted and parameter-bound against injection, so the agent can compose a screen you never anticipated.\n\n## Well-known rule sets, implemented as written.\n\nFour publicly documented screening methods, coded as the rules are stated and run nightly over the Korean market. Every tool returns the conditions it applied and flags the parts that are approximations. We make no claims about returns.\n\n### VCP · Trend Template\n\nVolatility contraction plus the eight trend conditions — 200/150/50-day alignment, at least 25% above the 52-week low, within 25% of the high, and top-decile RS.\n\n`screen_minervini · require_vcp`\n\n### CAN SLIM\n\nQuarterly EPS ≥25%, annual EPS ≥25% with ROE ≥17%, near highs, sales growth, RS ≥80. The I (institutional sponsorship) and M (market direction) legs are excluded — neither can be judged from single-name data.\n\n`screen_canslim`\n\n### Price cycle\n\nPhase classification on the 10- and 20-day EMAs, approximating pullbacks and re-breakouts inside an uptrend. The original is discretionary, so treat this as a reference signal.\n\n`screen_kell`\n\n### Momentum\n\nMoving-average alignment and short-term momentum to catch names already working. Like the Kell screen, this is flagged in the response as an approximation.\n\n`screen_schwartz`\n\nFinBridge is not affiliated with, or endorsed by, any of the people or firms named above. These are our own implementations of publicly published criteria; the Kell and Schwartz screens approximate discretionary methods. Screening output is informational and is not investment advice.\n\n## Everywhere else, Korea is a top-tier add-on.\n\nClaims are cheap. So the only things written here are the ones we called and measured ourselves.\n\n**A paid key still would not return Samsung Electronics**\n\nMajor financial-data APIs list KOSPI and KOSDAQ among their supported exchanges. Query one of them for Samsung Electronics with a **paid** key and the answer is “not available under your current subscription.” Korean coverage sits in the **$149**/month “global” tier (billed annually); the $22 and $59 tiers stop at the U.S., U.K. and Canada.\n\n**Other free tiers make you ration calls**\n\nThe free tiers we compared allow 20, 25, 250 and 800 calls a day. The 250-call one also caps history at **5 years of prices and 5 quarters of financials** — the same shape we chose. We would rather your history run out than your day.\n\nCompetitor figures verified 2026-08-27. Vendors change pricing without notice, so check for yourself rather than taking this at face value. We do not name them because the point of the comparison is the numbers, not the names.\n\n## For the days you would rather not talk to a model.\n\nThe same data the MCP connector serves, as a web app. It opens the moment you sign in — nothing extra to buy, nothing to install.\n\n### Screener · tearsheets\n\nStrategy screens as a table; click a name for its chart, RS line, peer comparison and valuation bands on one screen.\n\n### Portfolio · watchlist\n\nPaste in your holdings and get one combined value across currencies plus an asset-class breakdown. Watchlists, notes and saved screens stay on your account.\n\n### Backtests · valuation models\n\nRun a strategy over a past window, and work DCF and RIM models by changing assumptions. The earnings calendar and seasonality sit on the same screen.\n\n[13F smart-money tracker](/13f)\n\nEvery quarterly 13F from roughly 8,700 institutions, aggregated in full, showing what they added and what they cut. Real net buying with price appreciation stripped out, institutional consensus, new positions and exits. **It opens without signing in** — only the names and detailed holdings of the top three institutions and securities are withheld; ranks, dollar amounts and everything else are public.\n\nKorean prices are adjusted for splits, mergers and capital reductions (not dividends), so indicators around dividend events can be slightly distorted. U.S. price charts, screens and backtests are not offered — U.S. coverage is filings and financials. Every screen here is informational and is not investment advice.\n\n## Point Claude at it. That is the install.\n\nRegister it as an MCP connector and query Korean and U.S. data from inside the conversation. It is remote Streamable HTTP, so there is nothing to install locally.\n\n``` php\n# Claude -> Settings -> Connectors -> Add custom connector\nURL    https://mcp.gronox.kr/mcp\nAuth   Bearer <your API key>\n\n# try asking\n\"find KOSDAQ names above RS 90 that pass the trend template\"\n\"what did Berkshire add in its latest 13F?\"\n```\n\n**$0**\n\n**$10**\n\n$100.80 / yr\n\n**$30**\n\n$302.40 / yr\n\n**Contact us**\n\nLimits count **deep calls** only — symbol search, quotes and filing lists are never deducted, on any plan. What separates free from paid is not the count but the **depth of history**: free reaches back 130 trading days and 4 quarters, paid gets the full record (financials from 2008, Korean prices from 2020). Paid plans include a 7-day free trial. Prices are in USD and are converted to your local currency at checkout. [See full pricing →](/pricing)\n\n[Sign in with Google and get an API key →](/login)", "url": "https://wpnews.pro/news/show-hn-finbridge-korean-stock-market-data-for-ai-agents-mcp", "canonical_source": "https://www.gronox.kr/", "published_at": "2026-08-30 14:33:36+00:00", "updated_at": "2026-08-30 14:52:20.538493+00:00", "lang": "en", "topics": ["ai-tools", "ai-agents", "ai-infrastructure"], "entities": ["FinBridge", "OpenDART", "EDGAR", "data.go.kr", "St. Louis Fed", "HD Hyundai Electric", "Samsung Electronics", "Berkshire"], "alternates": {"html": "https://wpnews.pro/news/show-hn-finbridge-korean-stock-market-data-for-ai-agents-mcp", "markdown": "https://wpnews.pro/news/show-hn-finbridge-korean-stock-market-data-for-ai-agents-mcp.md", "text": "https://wpnews.pro/news/show-hn-finbridge-korean-stock-market-data-for-ai-agents-mcp.txt", "jsonld": "https://wpnews.pro/news/show-hn-finbridge-korean-stock-market-data-for-ai-agents-mcp.jsonld"}}