Hi @eventsmadesmart , thanks for posting on the Community 🙂.
You can embed the Square checkout flow and accept in-person payments in custom applications thanks to the Square Developer platform. You'll find more information and the how-to steps in this support article.
We're not able to assist with Square Developer related queries on this the Seller Community, but you can contact their dedicated team here, or join the Developer forum.
I hope this helps !
Lou
Community Moderator, Square
After a year of supporting the Square Community, I'm leaving Square for a new adventure down under !
Check out article "A Contact Guide to the Seller Community" to reach out to current Seller Community Moderators.
