WooCommerce Stamps.com API is a specialized shipping integration that allows store owners to automatically create ready-to-print USPS shipping labels based on order items. Active on more than 4,000 stores, it serves as a direct bridge between your store admin and the Stamps.com service. This extension simplifies fulfillment by eliminating the need to manually enter shipping data outside of WordPress.
WPExclusive members get access to Stamps.com API as part of a full plugin and theme library — plans from $9.99/month. See the full WooCommerce collection →
What Is WooCommerce Stamps.com API?
WooCommerce Stamps.com API is developed by WooCommerce and is an ecommerce plugin for WordPress. It has established itself as the leading USPS postage provider integration for WooCommerce users by offering a seamless way to handle postage directly from the backend. It belongs to the ecommerce category on WPExclusive, alongside other tools for professional online sellers.
The plugin solves the time consuming problem of manual label generation by pulling order data and converting it into valid USPS labels instantly. It is designed for merchants shipping anywhere from one to 1,000 packages a day who want to lower their shipping costs through pre-negotiated volume discounts.
WooCommerce Stamps.com API Features
The feature set is built around automating the fulfillment workflow and providing discounted shipping rates directly to the merchant.
Label Generation and Management
The plugin allows you to create ready-to-print labels for USPS and UPS carriers based on the specific items within an order. After creation, you can process refunds for labels or delete them if errors occur. A dedicated meta box in the order view provides address verification and easy access to all labels associated with that specific order for efficient ecommerce fulfillment.
Exclusive Shipping Discounts
Users gain access to discounted USPS rates with no minimum volume requirements, often seeing Priority Mail rates 3% lower than standard Commercial Base Pricing. Priority Mail Express shipments can see savings up to 17.3%. Additionally, the plugin offers a 10% discount on package insurance compared to standard USPS rates, which helps lower the overall overhead of shipping high-value items.
Administrative Controls
Store managers can monitor their account balance and top-up their funds directly from the WooCommerce admin area. This integration ensures that fulfillment staff do not need to share external login credentials to maintain shipping operations. You can also manage USPS Priority Mail and Priority Mail Express services without leaving the WordPress interface.
Pricing
The retail price for this extension is $99 per year when purchased directly. Check current pricing on the Stamps.com API sales page — WPExclusive members access it as part of their plan.
| Plan | Price | Sites | Includes |
|---|---|---|---|
| 1-Year Plan | $99 | 1 Site | Updates & Support |
| WPExclusive Membership | From $9.99/month | Unlimited | Stamps.com API + full library |
For developers managing multiple sites, a WPExclusive membership covers Stamps.com API plus hundreds of other plugins and themes — usually less than one premium license.
Latest Version
The current version is 2.3.0. The plugin receives regular updates to maintain compatibility with the latest versions of WordPress and WooCommerce core. WPExclusive updates plugin files promptly after each release.
How to Install
- Download the Stamps.com API .zip from your WPExclusive member account
- In WordPress: Plugins → Add New → Upload Plugin
- Select the .zip and click Install Now → Activate
- Navigate to WooCommerce → Settings → Shipping → Stamps.com to connect your account
- Enter your Stamps.com API credentials to begin generating labels
Use Cases
US-Based Online Retailers
Ideal for businesses operating within the United States that rely on USPS for their primary carrier in ecommerce operations.
High-Volume Fulfillment Centers
Warehouse teams can use the batch label generation to process hundreds of orders quickly without leaving the WordPress dashboard.
Agencies and Developers Managing Multiple Client Sites
Developers can deploy this shipping solution across multiple client stores using a single WPExclusive membership to manage costs efficiently.
Pros and Cons
✅ Strengths
- Deeply integrated with the WooCommerce order admin for native management
- Provides significant discounts on Priority Mail and Priority Mail Express
- Includes address verification to prevent shipping errors and returns
⚠️ Limitations
- Does not display shipping rates to customers at checkout; requires a separate USPS shipping method extension for that feature
- Requires an active Stamps.com account which carries its own monthly fee
- Developer auto-updates require an active license key. WPExclusive publishes updates manually when new versions are released.
Is WooCommerce Stamps.com API GPL Licensed?
Yes. WooCommerce Stamps.com API is distributed under the GNU General Public License (GPL) — the same license that governs WordPress itself. GPL gives any user the legal right to use, study, share, and redistribute the software. This is the legal framework that makes WPExclusive’s membership model possible.
WPExclusive distributes 100% original, unmodified files — the same release the developer publishes. No injected code, no alterations, no security risks.
Get WooCommerce Stamps.com API on WPExclusive
WPExclusive membership starts at $9.99/month, $87/year, or $149 lifetime — giving you WooCommerce Stamps.com API plus every plugin and theme in the library, on unlimited sites.
Explore the full WooCommerce collection → or browse all WordPress plugins →
Frequently Asked Questions
What does WooCommerce Stamps.com API do?
WooCommerce Stamps.com API is an shipping plugin used to automate label creation. Stamps.com API connects your store to USPS and UPS services to print postage and manage shipments directly from the backend.
Is WooCommerce Stamps.com API free?
This is a premium-only extension. However, you can access it via a WPExclusive membership starting from $9.99/month.
What is the latest version of WooCommerce Stamps.com API?
The current version is 2.3.0 — WPExclusive members always receive the most current release as it becomes available.
How much does WooCommerce Stamps.com API cost?
The retail price is $99/year. Via WPExclusive, it is included in plans from $9.99/month.
Is it legal to use WooCommerce Stamps.com API via WPExclusive?
The plugin is GPL licensed, which explicitly permits redistribution. WPExclusive provides original, unmodified files — fully within GPL terms.
Does Stamps.com API show rates to my customers?
No, Stamps.com API only handles the label creation and backend fulfillment. To show live USPS rates to customers during the checkout process, you must use a separate shipping method plugin.
