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A self-hosted market dashboard that needs zero API keys (A-shares, HK, US, gold, commodities, treasury yields)

#webdev #opensource #selfhosted #javascript

The one-screen market cockpit with no API bills

Live demo: https://mrd.hermes.cc.cd — no keys, no login, works instantly. Source: github.com/theBigGavin/marketingdashboard

Most market-data APIs charge $20–80/mo for real-time feeds. This dashboard pulls everything from free public endpoints (Tencent, Sina, Eastmoney, Wallstreetcn, CNBC, Binance...) through a zero-dependency Node proxy with in-memory TTL caching. It costs nothing to run.

What's on screen

  • Global indices side by side — SSE / SZSE / Hang Seng / Dow / Nasdaq / S&P 500 / VIX, minute-level charts
  • Commodities & crypto — NY/London gold, SHFE gold, LME copper, crude, BTC — live + intraday curves
  • US Treasury monitor — 10Y/2Y yields, 2s10s spread, yield-curve history back to 2001
  • Sector money-flow — minute-level cumulative net-inflow curves; click a sector and the stock ranking panel switches to that sector's constituents instantly
  • Industry-chain panorama — semiconductors, AI compute, EVs, robotics, innovative drugs... upstream/midstream/downstream tickers linked to live quotes
  • 7×24 news flash — auto-highlighted macro keywords
  • Earnings window — disclosure calendar, profit forecasts, 12-quarter per-company trends

All charts are hand-written SVG (no charting library), which keeps the bundle small and the rendering fast even on a 2015 TV.

Deployment 

docker build -t mrd . && docker run -p 3000:3000 mrd
# or just open the live demo
Enter fullscreen mode Exit fullscreen mode

Runs on a single Node process — API + static frontend on one port. There's also a macOS app (thin Swift WKWebView shell) and an Android TV build with D-pad navigation.

What I learned

  1. Public endpoints are good enough for research-grade data — GBK-encoded Tencent quotes, Eastmoney's clist API for sector rankings, Sina for futures. Each needs its own decoding/retry/rate-limit handling.
  2. A tiny in-memory cache with LRU eviction beats any external cache — 1.5s–24h TTLs per endpoint, no Redis needed.
  3. Hand-written SVG charts are underrated — no 200KB charting dep, full control over zoom/overlay behavior, and they survive CSS-zoom panel overlays on TV.

Star it if you find it useful, and PRs are welcome.

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