Fix Shopify Error 422 Unprocessable Entity For Forms And API Requests (2025)

Updated: 11/29/2025

You submit a contact form, checkout customization, or API request in Shopify, and instead of a success response you see Error 422 Unprocessable Entity. The request reaches Shopify, but the platform refuses to process it due to semantic problems with the data. This typically means required fields are missing, CSRF or authenticity tokens are wrong, or your JSON payload does not match Shopify’s expected structure.

Table of Contents

Method 1: Fix Storefront Forms And CSRF Tokens

Custom JavaScript that renames, removes, or serializes form fields can easily break the structure of what Shopify expects. Temporarily disable custom scripts related to affected forms, test again, and then re introduce changes more carefully once you know which line is causing the 422.

Warning: Always keep a backed up copy of the original theme files before editing Liquid or JavaScript, so you can roll back quickly if a change breaks checkout or customer forms.

Method 2: Correct Shopify API And Webhook JSON Payloads

Implement server side validation to ensure fields like email, price, inventory quantity, and variant IDs are present and of the correct type before hitting Shopify. Reject or correct invalid input in your own code so Shopify does not have to respond with 422 for avoidable mistakes.

Method 3: Handle Edge Cases Like Inventory, Duplicate Records, And Tokens

If your app or embedded app repeatedly hits 422 after long idle periods, session or CSRF tokens may be stale. Implement logic that refreshes tokens by reloading the app frame or performing a new OAuth handshake before sending important write operations.