Do i realy need matic mainet token if i got USDC to trade using the client

[guidryheal-create]

when i use the client web site address / private or my own using brave wallet.
i always got insufficient fund. Whereas i use USDC on polygon chain, eth, and polygon.

i feel like it make no sens because even the website use those to make trades.
but when i use the client, no matter the signature type, no matter the process and even using others code.
i got insufficient balance for a 1$ trade.

when i got to some exchange they ask me to get matic main net token.

and now i realize that it s kinda complicated to even buy or swap those which make no sens.

I m making a mistake or is this the way i should do it ?

[ayv8er]

Trading is always via bridged USDC on Polygon; it's USDCe.
Contract Address: 0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174

Whether you place orders on polymarket.com UI or you place orders programmatically, you will always need to use USDCe.
If you've setup trading direct from your EOA via API, then your EOA will need to pay gas on every trade.
But if you've deployed the Safe proxy wallet from your EOA, then gas is covered on trade execution.