Tradier does support trust accounts, but they need to be set up manually.  Trust accounts are considered professional accounts according to the NYSE and other market centers that provide real-time quotes.  The estimated cost for this is $100/month.

Please contact Tradier customer support directly to set up your account. You can email them at service@tradierbrokerage.com and mention you want to set up a trust account that will be linked to Options Cafe.