You can now dynamically change the URL or header fields in Shopify Flow’s ‘Send HTTP request’ action using template variables. This allows for customization such as altering a URL’s path based on an ID, e.g., ‘https://shopify.com/customer/{{customer.id}}’. Template variables are unrestricted in the action’s headers and can be added to both header values and keys.
→ Read the full update on changelog.shopify.com