Kalshi

Federally registered, and in court

Seven pages on Kalshi: what it is, whether it is lawful where you are, what it charges.

Kalshi holds a CFTC contract-market designation and is being sued by 37 states and the District of Columbia over its sports contracts. Both are true at once, and every page below cites the filing, order or schedule it describes rather than somebody else's summary.

Start with whether it is legal where you live, because that decides whether the rest matters to you. Then read the fee math, which applies however the litigation resolves.