thread Square Terminal API - First live transaction problem in Payments Troubleshooting

Square Terminal API - First live transaction problem

neville_cook — Sun, 21 Sep 2025 08:33:52 GMT

We are trying to get the Square Terminal API running on a live terminal for the first time, having gone as far as we can on the Square API Sandbox.
When we pair the Square Terminal to our software using a Device Code, and then try to create a Terminal Checkout using the API, we're not getting any response on the Terminal, even though the API indicates the Checkout is pending.
We've tried everything we can think of.
Does anyone have any idea what we might be missing?

Re: Square Terminal API - First live transaction problem

neville_cook — Fri, 18 Dec 2020 06:48:00 GMT

Problem solved.
I had to upgrade the software on the Square Terminal. It took 5 rounds of software updates to bring it up to date, but now it works exactly as expected.

Re: Square Terminal API - First live transaction problem

Seamus — Mon, 21 Dec 2020 00:48:54 GMT

Thanks for posting back with the solution @neville_cook!

Glad to hear you got things working in the end!