Kalshi
./BetCFTC-regulated event contract exchange with a documented REST and WebSocket API for algorithmic trading
OpenAPI
$ protocol support
$ payment protocols
none documented — this service is not reachable over an agent payment protocol
$ agent access
authAPI Key
onboardingPartial — dashboard signup, then API key
tosExplicitly welcomes bots
webhooksNo
free tierYes
billingper-transaction
#prediction-market#event-contracts#regulated#order-book
https://kalshi.com
// last verified 8/26/2026
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