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Update FCM Subtrader Event Contract Daily Cap

Changed on

Sets the event-contract daily premium cap for an FCM member's subtrader. The cap bounds the subtrader's net premium at risk per trading day. It is enforced on cap-reservation sessions — which every subtrader-bound API key uses — and is mandatory there: a subtrader with no cap cannot trade through its bound keys. Cap changes take effect immediately; existing resting orders are never cancelled by a cap change.

put/fcm/subtraders/event_contract_daily_cap

Request

  • Base URL: https://external-api.kalshi.com/trade-api/v2
  • URL: https://external-api.kalshi.com/trade-api/v2/fcm/subtraders/event_contract_daily_cap
  • Auth: API key in header KALSHI-ACCESS-KEY and API key in header KALSHI-ACCESS-SIGNATURE and API key in header KALSHI-ACCESS-TIMESTAMP

Request body

subtrader_idstring required

The subtrader whose daily cap should be set. Must belong to the requesting FCM.

limitstring required

Fixed-point US dollar string. Most request fields accept 2-4 decimal places (e.g., "0.56", "0.5600"); responses emit up to 6. Valid quote intervals for a given market are constrained by that market's price level structure.

Example request

{
  "limit": "0.5600"
}

Response

Daily cap updated successfully

EmptyResponse required

An empty response body

Changes