EasyPost Fulfillment Integration Overview

EasyPost Fulfillment Integration Overview

EasyPost Fulfillment is a 3PL fulfillment center providing a simple, efficient, tech-forward solution for all fulfillment needs. From warehousing to receiving, pick-packing and shipping, EasyPost can do it all for one flat, per-package fee. There are no hidden costs and you pay nothing until you ship a package.

Website: https://www.easypost.com/fulfillment.html

Extensiv Integration Manager Sign-up Link: https://app.cartrover.com/signup.php?r=easypost

Supported functions

  • Order Send
  • Shipment Confirmation Pickup
  • Inventory Sync Pickup
  • Multi-Warehouse Support
  • Cancel Order in WMS


  1. Integration Manager retrieves new sales orders from each order source
  2. Integration Manager delivers the sales orders to EasyPost Fulfillment
  3. Integration Manager retrieves shipment tracking and inventory levels from EasyPost Fulfillment
  4. Integration Manager delivers shipment tracking and inventory levels to each order source

The frequency of each workflow step is configurable within your Integration Manager account. (Steps 1 and 4 are set in your cart settings) (Steps 2 and 3 are set in your merchant settings)

Required Parameters

Credentials from EasyPost that are needed to setup this connection in Integration Manager. The setup guide (linked at the bottom of this page) will explain further instructions.

  • Production API Key
  • Test API Key

Important Integration Notes

Before setting up this connection to EasyPost Fulfillment, please review these important notes to ensure the integration is successful:

Backordered Inventory

Please be aware that EasyPost will reject your orders if they do not have enough inventory.

  1. Integration Manager will mark rejected orders as On Hold and will automatically resend them every day around 1:00 AM PT. 
  2. You will need to handle Order Cancellation requests manually. If buyers cancel orders in Shopping Carts, please mark those orders as Cancelled Sending To WMS in Integration Manager. 
Product Identifier
  1. EasyPost Fulfillment only identifies products/items using their barcode identifier within the EasyPost system (typically the UPC). If your order sources cannot provide this exact barcode in the SKU field, you must add your order source SKU as an alias to the EasyPost item within Integration Manager, so that Integration Manager can translate the SKU to the barcode before passing orders to EasyPost. Instructions listed HERE
  2. If you would like Integration Manager to translate your Bundle Items into components, please reach out to Integration Manager support.

Order Numbers
EasyPost does not accept external order numbers. This is a limitation in the EasyPost system. EasyPost will assign their own ID to each order. Integration Manager will collect this EasyPost Order ID and display it in the Integration Manager Order screen.

EasyPost Fulfillment Setup Guide

Follow the step by step instructions on the EasyPost Fulfillment Setup Guide to connect your EasyPost Fulfillment account to Integration Manager.

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