LiveContract

Contract specification used by MesoLive APIs (options, futures, stocks, indices).

Field	Type	Required	Nullable	Default	Description
ContractType	MesoContractType	Yes	No		Contract type (Stock, Index, Options, Futures, FuturesOptions).
Underlying	LiveUnderlying	Yes	No		Underlying symbol information for this contract.
Root	str	Yes	Yes		Option root / trading class (when applicable).
OptionType	MesoOptionType	Yes	Yes		Option type (Call/Put) for option contracts; null for non-options.
Expiration	datetime	Yes	Yes		Expiration date for expiring instruments; null for non-expiring instruments.
Strike	Decimal	Yes	Yes		Strike price for options; null for non-options.
Multiplier	Decimal	Yes	Yes		Contract multiplier (e.g. 100 for many equity options); null if unknown/not applicable.