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polymarket

Skill0 starsChanged 21 days agoMITView on GitHub

Trade Polymarket US (polymarket.us, the CFTC-regulated US exchange) via the official retail REST API: discover events and markets, read orderbooks, check balances and positions, place and cancel limit orders. Use when the user wants Polymarket US trading, market prices, or portfolio status. This is NOT polymarket.com (international) — different API, auth, and custody.

  • Reads credentials

We split this skill into the rules it gives an agent

5 rules. 0 are common, 3 are distinctive, and 2 are very specific to this project.

  • 0

    Common

    Most of the 21 edited versions we read keep these.

  • 3

    Distinctive

    This author's own choices. Worth a look.

  • 2

    Very specific

    Tied to their project's names, files or tools. Probably skip.

  • Common
  • Distinctive
  • Very specific
  1. Very specific:

    No bundled CLI — call the official REST APIs directly with any HTTP client (e.g.

    line 12
  2. Distinctive:

    Prices are in cents, 1–99: Every contract pays $1.00 if correct, $0 if wrong.

    line 43
  3. Distinctive:

    Every order is real money — no sandbox exists: Before placing any order, present market / side / size / price / total cost and require the …

    line 44
  4. Distinctive:

    Use the fee math in rule 3 to sanity-check cost before any first live order on a new path.

    line 46
  5. Very specific:

    Verify a position exists (via positions) before closing it.

    line 47

“Common” is measured: kept by at least 6 in 10 of the 21 edited versions of this file we could read. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.

Keep what fits and drop the rest. Your version, ready for your agents.
Files
SKILL.md

Polymarket US

Purpose

Manage Polymarket US event-contract trades: discover markets, inspect orderbooks, view portfolio, place and cancel orders. Polymarket US is the CFTC-regulated Designated Contract Market operated by QCX LLC — fiat USD, fully off-chain, Ed25519 API-key auth.

Tooling

No bundled CLI — call the official REST APIs directly with any HTTP client (e.g. curl). Public market data lives on the gateway host (no auth); trading calls go to the API host with the X-PM-* headers from the Auth section below.

PUB=https://gateway.polymarket.us

curl -s "$PUB/v1/events?limit=10"                        # events (public)
curl -s "$PUB/v1/markets?limit=10"                       # markets (public)
curl -s "$PUB/v1/search?query=Chicago%20temperature&limit=5"  # search (public)
curl -s "$PUB/v1/markets/<slug>/book"                    # order book (public)
curl -s "$PUB/v1/markets/<slug>/bbo"                     # best bid/offer (public)

Authenticated calls (https://api.polymarket.us + /v1 paths): GET /v1/account/balances, GET /v1/portfolio/positions, GET /v1/orders/open, POST /v1/orders to place, DELETE /v1/orders/{id} to cancel one, DELETE /v1/orders to cancel all.

Auth

Credentials come from environment variables at runtime — never hardcoded, never written to files, logs, or memory.

  • POLYMARKET_KEY_ID — API key UUID, from https://polymarket.us/developer
  • POLYMARKET_SECRET_KEY — base64 Ed25519 private key (shown once at key creation)
  • POLYMARKET_AUTH_BASE — optional override (default https://api.polymarket.us)
  • POLYMARKET_PUBLIC_BASE — optional override (default https://gateway.polymarket.us)

Authenticated requests sign f"{timestamp_ms}{METHOD}{path}" with Ed25519 (base64), sending X-PM-Access-Key / X-PM-Timestamp / X-PM-Signature. Timestamps must be within 30s of server time.

Operating Rules

  1. Prices are in cents, 1–99. Every contract pays $1.00 if correct, $0 if wrong. Long = bought YES contracts (profit if outcome occurs); short = sold YES contracts (profit if it doesn't).
  2. Every order is real money — no sandbox exists. Before placing any order, present market / side / size / price / total cost and require the user's explicit confirmation. Never skip this, never batch it silently.
  3. Fees punish taking. Taker fee is Θ=0.0695 × C × p × (1−p) (up to $1.74/100 @ 50¢); makers earn a rebate Θ=−0.0125 (up to $0.31/100 @ 50¢), credited at fill. Run the fee math before deciding to cross the spread — on most prices, posting as a maker is materially cheaper.
  4. Use the fee math in rule 3 to sanity-check cost before any first live order on a new path.
  5. Verify a position exists (via positions) before closing it.
  6. Rate limit: 20 req/s per API key (429 on breach) — back off, prefer the WebSocket for streaming. Orders not processed within 5s are rejected by a latency stopgap ("Global Rate Limit Exceeded" message) — retry logic must distinguish this from a real rate limit.
  7. Weekly maintenance window Thursday 6–8am ET — avoid scheduling sweeps then.
  8. Settlement sources differ from Kalshi. Polymarket US weather markets settle on NWS Climatological Reports (e.g. KMDW CLI), Kalshi on The Weather Company. Never treat same-topic cross-venue positions as arbitrage.

Also on Honeypot — a free, open index of skills for AI agents: https://honeypot-e6c.pages.dev Image: Indexed on Honeypot

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  • Other versions22 projects use a version of this.

    Word for word · 0

    None found.

    Edited · 0

    None found.

    Wrote their own version · 22

    1. math-inc/OpenGauss★ 1.3ksame name
    2. Tommy-yw/RunbookHermes★ 546same name
    3. machina-sports/sports-skills★ 262same name
    4. suitedaces/dorabot★ 247same name
    5. RedWoodOG/Hermes-Desktop★ 177same name
    6. Starchild-ai-agent/official-skills★ 29same name
    7. delorenj/skills★ 18same name
    8. Skate-Org/skills★ 12same name
    9. Samin12/skills★ 8same name
    10. ChainGPT-org/chaingpt-claude-skill★ 7same name

    12 more not listed

    How matches are found. Word for word: the exact same text. Edited: shares passages with this file (“99% same” means 99% of its five-word phrases also appear here; 10% or more counts). Their own version: similar meaning, or, weakest, the same name. We can’t tell which project had it first. Projects are counted among the 200 most-starred candidates, and mentions are links to the repository we found, up to 50 per site, so both counts are a floor.

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