Custom Shipping Endpoint
Sending shipping requests to your own server to calculate rates — useful for pulling in a carrier or fulfillment service that isn't built in natively.
Custom Shipping Endpoint Overview
How a custom shipping endpoint works: your server receives the cart as JSON and returns shipping rates, with helper libraries available for PHP, Node.js, and AWS Lambda.
Add a Custom Shipping Endpoint
How to point your store's shipping requests to your own HTTPS endpoint from the admin, enable rate tampering protection, and troubleshoot if rates don't appear.