Square Credit Card Setup

Start with Sandbox. Sandbox makes test payments only. After it works, return here and configure Production separately.

1. Sandbox / Test2. Production / Real Payments

Production / Real-Life Questions

Processing Fee

For a fixed $2.50 fee, use Fixed amount and enter 2.50.

Credential safety: never email or post an access token. This page writes it only to store/square_config.php on your server.