STEP 1: Go to your Mercury account and click the up arrow on the bottom left of your page.
STEP 2: Click Settings.
STEP 3: Click API Tokens.
STEP 4: Click Create an API Token.
STEP 5: Please enter 18.104.22.168,22.214.171.124,126.96.36.199 to IP Whitelist field.
Please select Read and Write permission.