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polymarket_book (Polymarket CLOB book)

tool-polymarket-book

Use the polymarket_book tool to fetch Polymarket CLOB order book depth (YES/NO) via Gamma + CLOB and expose best bid/ask/mid.

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SKILL.md

Full skill instructions

polymarket_book (Polymarket CLOB book)

When to use

  • Liquidity check before sizing into a market.
  • Spread + depth + mid estimation.

Parameters

  • marketId (string, required): Gamma numeric id (e.g. "516710") or conditionId hex ("0x...").
  • outcome ("YES" | "NO", optional): Defaults to "YES".
  • depth (int, optional, 1–200): Levels per side; default 20.

Examples

{ "name": "polymarket_book", "params": { "marketId": "0xabc...def", "outcome": "YES", "depth": 50 } }

Output

  • Returns: { marketId, conditionId, question, slug, endDate, outcome, tokenId, bookAvailable, bestBid, bestAsk, mid, bids[], asks[], ts }
  • Rendered:
    • Emits a JSON output with title orderbook (used by the UI to open/​focus a book window when available).
    • Market (text with mid/​bid/​ask and “no CLOB orderbook” when missing)
    • Asks + Bids (tables)

Notes

  • Some markets have no CLOB orderbook; the tool returns bookAvailable=false and empty bids/​asks.
  • targetWindow: book