01
Install CardShipper
Open the Chrome Web Store listing, add CardShipper to Chrome, then pin the extension from Chrome's extensions menu.
Install the extension, then sign in with your CardShipper account.
After checkout, CardShipper is activated by signing into the Chrome extension with the same email. Install from the Chrome Web Store once the listing is live.
02
Sign in
Open the popup and sign in with the same email and password you used on the website account page.
03
Connect EasyPost
Open Settings, save your EasyPost API key and sender address, then preview rates for one order.
Website account sessions cannot be shared directly with a Chrome extension. The account is the same in Supabase, but the extension needs its own sign-in so it can store its session securely in extension storage.