How secure is the USPS account connection?

Your USPS account credentials are never stored by 4Seller. We use OAuth 2.0 authentication, which is the industry standard for secure API access. You'll be redirected to USPS's official login page to authorize the connection, and we only receive an access token to perform shipping operations on your behalf.

Can I use my existing USPS account?

Absolutely. You can connect your existing USPS account to 4Seller. There's no need to create a new account. Simply authorize 4Seller to access your shipping services during the connection process.

Do I get commercial pricing through 4Seller?

Yes! When you ship through 4Seller using your USPS account, you automatically receive commercial pricing which is significantly lower than retail rates. The exact discount depends on your shipping volume and the specific USPS service you choose.

How are shipping costs handled?

All shipping charges are billed directly to your USPS account. 4Seller does not charge any additional fees for processing USPS shipments. You'll see the shipping costs deducted from your USPS account balance as usual.