Polymarket Combo Builder

Build an atomic Polymarket combo (parlay) - pick 2+ binary market legs, get live combined odds quoted over RFQ, and place the whole thing as ONE signed order. Every leg must hit to win; any single leg losing is a total loss of the stake. Live placement works with EOA / self-custody wallets today; deposit-wallet live is blocked pending Polymarket. Dry-run by default (a local plan, not a paper fill). Sports-general (World Cup ready).

Combo Builder

Place a real Polymarket combo (parlay): bundle 2+ binary legs into one YES/NO position, settled by a single signed RFQ order on Polymarket's combo exchange. Polymarket quotes the combined odds live; you sign once; if every leg hits you win the combined payout, and if any single leg loses you lose the whole stake.

This is the atomic combo — distinct from the leg-by-leg polymarket-worldcup-parlay-roller. Live placement works with EOA / self-custody wallets today. Deposit-wallet dry-run + signing paths exist, but live deposit-wallet combos are blocked until Polymarket enables combo-exchange approvals for deposit wallets (details below).

Read DISCLAIMER.md before going live. This is a framework, not an edge, and it runs in dry-run by default. Dry-run is a local plan — it resolves legs and shows the combined-odds estimate but signs and sends nothing. There is no paper / simulated-fill mode for combos (they're Polymarket-only). Note: dry-run still reads your wallet key to resolve trading identity, but it never signs or sends.

Polymarket venue only. Combos are a BETA Polymarket product (sports markets today); label them as such to users.

How payout works

A combo's combined price is the makers' quoted probability that all legs hit. Example: three legs near 0.50 each quote around a 0.12–0.15 combined price, i.e. a ~7–8x payout multiple on the stake. The quote you sign already bakes in maker spread — it is not a naive product of the leg prices (the skill shows that product only as a pre-quote preview).

Setup

Agent: do this once with the user.

1. Get the thesis in natural language, e.g. "Brazil to win AND over 2.5 goals AND Argentina to win."
2. Resolve each pick to a combo leg. Combo-eligible legs come from the combo-markets feed — simmer_sdk.combo.fetch_combo_legs(). Each leg exposes position_ids = [YES_token, NO_token]; store the chosen side's token id. Moneyline, spread (-spread-), and total/over-under (-total-) legs are all eligible.
3. Confirm with the user, restating each leg's exact resolution condition and the total-loss-if-any-leg-loses risk.
4. Write combo_config.json from combo_config.example.json (>= 2 legs).
5. Dry-run first, review the plan, then go live.

Run

python combo_builder.py            # dry-run: resolve legs, show estimate + plan, place nothing
python combo_builder.py --live     # place the combo for real (money path)
python combo_builder.py --legs     # browse combo-eligible legs (no config needed)

Dry-run opens no socket, signs nothing, and moves no money. --live requires a configured wallet (WALLET_PRIVATE_KEY) and a live Simmer client.

Wallet support

• EOA (signature_type 0): standard self-custody key. Works today.
• Deposit wallet (signature_type 3 / POLY_1271): signing works, but live combos are not yet available — see below.

OWS-signed wallets are not yet supported for combos — use a raw WALLET_PRIVATE_KEY (the deposit-wallet owner key) for now.

⚠️ Deposit wallets: not enabled yet (pending Polymarket)

Combos settle on a separate exchange that your wallet must approve first. A deposit wallet can only approve contracts through Polymarket's relayer (its execute is onlyFactory → onlyOperator), and that relayer doesn't yet permit approving the combo exchange — so a deposit-wallet combo signs correctly but would fail at on-chain settlement. The skill detects this and blocks a live deposit-wallet combo with a clear message rather than letting it fail confusingly. This auto-resolves once Polymarket whitelists the combo exchange on the deposit-wallet relayer. EOA / self-custody wallets are unaffected and work today. (Dry-run works for all wallet types.)

Notes

• Min stake $1 (Polymarket order minimum). The stake is the most you can lose.
• The combined quote is valid ~5 seconds; the skill signs and accepts inside that window automatically, re-quoting if it lapses.
• No "risk-free" or "guaranteed" anything — a combo is strictly higher-variance than its legs.