Price a Polymarket combo (parlay) without executing it

Returns the real maker-quoted blended price for a multi-leg Polymarket combo. A naive product of the individual leg prices does NOT match what the RFQ gateway quotes, so this is the only correct way to price a parlay before placing it. Read-only: it opens an RFQ, takes the quote, drops the connection, and commits nothing. Polymarket-only — combos exist on no other venue. camelCase. The whole /combo/* family uses camelCase request and response field names, where every Orders endpoint is snake_case — check the schema for the family you are calling rather than assuming one convention across this API. Prices and amounts are six-decimal fixed-point INTEGER strings ("16393" = 0.016393), not decimals. Requires connected Polymarket credentials. Every wallet type can quote (quoting never signs), including imported wallet types that cannot yet execute a combo. Auth & scope. Requires trade:read for polymarket. No mutation gate, so a session JWT alone works. Not rate limited.