curl --request GET \
  --url https://api.elections.kalshi.com/trade-api/v2/account/limits \
  --header 'KALSHI-ACCESS-KEY: <api-key>' \
  --header 'KALSHI-ACCESS-SIGNATURE: <api-key>' \
  --header 'KALSHI-ACCESS-TIMESTAMP: <api-key>'

{
  "usage_tier": "<string>",
  "read_limit": 123,
  "write_limit": 123
}