Market Scanner (Polygon) for Claude, Cursor, ChatGPT & agents

Market Scanner — scan the whole US stock market via Polygon snapshots: top gainers/losers, pre/intraday gappers (with price + volume filters), and market breadth (advance/decline)

curl -fsSL https://tradeloop.top/install.sh | sh

What it does

Market Scanner — scan the whole US stock market via Polygon snapshots: top gainers/losers, pre/intraday gappers (with price + volume filters), and market breadth (advance/decline). Plus KEY-FREE long-horizon screens via Yahoo's public endpoints (no Polygon key or session needed): fundamental_screen (value/growth/dividend presets + custom market-cap/PE/yield/sector filters with ROE & debt enrichment) and near_52w_low (S&P 500 names trading near their 52-week low — the quality-pullback watch pool). Research screens only, not stock picks.

The Market Scanner (Polygon) skill is one of 40+ pre-wired TradeLoop integrations that any MCP-compatible client — Claude Desktop, Claude Code, Cursor, Windsurf, Codex CLI, and ChatGPT desktop — can call out of the box. You don't configure MCP servers or copy API keys into a JSON file; the TradeLoop daemon discovers the skill at startup and exposes its tools to whichever AI client is running.

Sample prompts

Once TradeLoop is installed and Market Scanner (Polygon) is connected, ask your agent something like:

• “Movers from Market Scanner (Polygon).”
• “Gappers from Market Scanner (Polygon).”
• “Breadth from Market Scanner (Polygon).”

Tools available (5)

• scanner__movers

  Top market movers — the day's biggest gainers or losers across all US stocks. Returns ticker, price, percent change and volume. Use to see what is running today.

• scanner__gappers

  Scan the full market for gap stocks — names whose open gapped up/down from the prior close, filtered by minimum gap %, price and volume. Sorted by absolute gap size. Great for pre-market / intraday momentum setups.

• scanner__breadth

  Market breadth across all US stocks: advancers, decliners, unchanged, advance/decline ratio and percent advancing. Use to gauge overall risk-on vs risk-off tone.

• scanner__fundamental_screen

  Fundamental stock screener for long-term investors — KEY-FREE via Yahoo's unofficial screener endpoints (works even when Polygon/session is unavailable). Two modes: preset (quality_value = Yahoo undervalued large caps, growth_tech = Yahoo growth technology, high_dividend = US large caps with forward yield >3% on NYSE/N

• scanner__near_52w_low

  S&P 500 names trading near their 52-week low — the quality-pullback observation pool (优质股回撤观察池). KEY-FREE via Yahoo batch quotes. Screens a bundled S&P 500 constituent list (snapshot dated in output; a few post-snapshot index changes may be missing) for stocks within max_pct_above_low of their 52w low, above a market-c

How to connect

Market Scanner (Polygon) needs a provider API key to talk to polygon. Connect it from the TradeLoop dashboard:

1. Run curl -fsSL https://tradeloop.top/install.sh | sh on macOS / Linux (or the PowerShell command on Windows).
2. Run tradeloop login to create your account and a device-bound encryption key.
3. Visit tradeloop.top/connect and authorize Market Scanner (Polygon).
4. Run tradeloop update to sync the skill + credentials to every installed AI client.

Pricing

Free at every TradeLoop tier. Connect your account once at /connect; the OAuth or API-key credential stays encrypted on your machine and syncs to your other devices via the TradeLoop vault.

See the full TradeLoop pricing breakdown — Free $0/mo, Pro $29/mo, Ultra $99/mo — on the homepage.