UPDATE 2020: THIS PLUGIN HAS BEEN DISCONTINUED.
WordPress USPS Tracking Plugin allows you and your clients to track a shipment via USPS. It will work nicely with any WordPress configuration and does NOT depend on an e-commerce plugins.
- Upload usc-usps-tracking.zip to your blog’s wp-content/plugins directory;
- Activate the WordPress USPS Tracking Plugin in your Plugin Admin interface;
- Go to Settings -> USPS Tracking and enter your USPS ID;
- Add [usps_tracking] shortcode to a page or post to display the form.
1. Enter your USPS ID under Settings -> USPS Tracking.
2. Set the product-wide stock in the Product Entry form.
3. The query result (simple version).