Nitromule Help Center

Updated 2026-09-07

Learn how to rate shop UPS, USPS, and FedEx, buy labels, connect stores, and run customer portals — outside the logged-in app, just like a classic help center.

Start here

• What is Nitromule?
• Create your account
• Print your first label
• Free rate quotes
• Plans overview

Shipping & labels

• Get rates
• Create and print labels
• Ship-from & return address
• Address validation
• Void and download
• Shipping overview

Orders & stores

• Orders dashboard
• Connect WooCommerce
• Connect eBay
• CSV for any store

Portals & carriers

• What are portals?
• UPS · USPS · FedEx
• Bring your own account

FAQ & troubleshoot

• FAQ home
• Common errors
• Rates not showing
• WooCommerce connection

Developers

API, webhooks, and MCP live on docs.nitromule.com.