cURL
curl --request POST \ --url https://api.vatic.trading/api/v1/new_fees/trade-estimate \ --header 'Content-Type: application/json' \ --data ' { "side": "BUY", "makingAmount": 123, "takingAmount": 123, "eventId": "<string>", "eventSlug": "<string>" } '
Calculates the exact taker fee and net outcome using Polymarket’s April 2025 fee formula: fee = C × feeRate × p × (1 − p). Precision: 5 decimal places.
fee = C × feeRate × p × (1 − p)
BUY
SELL
Fee estimate result