Custom sheet with API scripts tied to it?

I am working on a custom sheet and I wanna add a number of custom scripts that work with them. is this plausible? (I have a pro subscription)

Depends on your end goal. If you want to release the sheet for others to use vie the Roll20 repository, then I'd recommend not doing so as public sheets have to function regardless of subscription level. If this is a personal project, then sure. I would however that character sheets can do pretty much everything an API script can do with the sole exception of interacting with elements of the map/tokens.

The 13th Age by Roll20 character sheet has a Companion Mod, so it’s not unknown. The sheet works fine without it, though.  The Star Wars: FFG (API-Compatible)   Character Sheet requires the  Star Wars: Fantasy Flight Games - Dice Roller  Mod to function, so it’s a Pro subscriber only sheet.

Yep, the star wars: ffg sheet is grandfathered in since it was made before they made the decision that public sheets needed to work for all sub levels.

thanks guys yeah I wasn't sure if i am gonna make it public or not but that's good to know ty