---
title: Introduce Fulfillment Constraints built on Shopify Function - Shopify developer changelog
description: Shopify’s developer changelog documents all changes to Shopify’s platform. Find the latest news and learn about new platform opportunities.
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  html: https://shopify.dev/changelog/introduce-fulfillment-constraints-built-on-shopify-function
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---

[Back to Developer changelog](https://shopify.dev/changelog)

July 19, 2023

Tags:

* API
* 2023-10

# Introduce Fulfillment Constraints built on Shopify Function

* As of `2023-10` version of the Shopify Functions API, you can use the Fulfillment Constraints API to have a higher degree of customization when defining fulfillment and delivery strategies. With this API, checkout won’t return any shipping rates if the configured constraints can’t be met.
* For example, you can specify that certain products must be fulfilled from a specific location, based on buyer information, cart information or metafields.
* Learn more about Fulfillment Constraints on [Shopify.dev](https://shopify.dev/docs/api/functions/reference/fulfillment-constraints).