---
title: Host parameter added to the OAuth redirect URI - Shopify developer changelog
description: >-
  Shopify’s developer changelog documents all changes to Shopify’s platform.
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source_url:
  html: 'https://shopify.dev/changelog/host-parameter-added-to-the-oauth-redirect-uri'
  md: >-
    https://shopify.dev/changelog/host-parameter-added-to-the-oauth-redirect-uri.md
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  createdAt: '2021-04-14T17:46:15-04:00'
  postedAt: '2021-04-14T00:00:00-04:00'
  updatedAt: '2024-02-02T10:05:00-05:00'
  effectiveAt: '2021-04-14T00:00:00-04:00'
---

April 14, 2021

Tags:

* Platform

# Host parameter added to the OAuth redirect URI

We've introduced a `host` query parameter as part of the URI that Shopify redirects to after the OAuth grant flow. This parameter represents the domain that hosts your embedded app and is needed to initalize App Bridge 2.0 in the Shopify admin.

For most apps, there is no action required following this change. This change might be a breaking change if your app's `hmac` verification step doesn't verify the `hmac` using all the parameters available in the redirect URI.

For steps to verify the `hmac` parameter, see the ["Verification" step of the *Authenticate with OAuth* guide](https://shopify.dev/tutorials/authenticate-with-oauth#verification).

To see what other changes are needed to use App Bridge 2.0, see [Migrate your app to App Bridge 2](https://shopify.dev/tutorials/migrate-your-app-to-app-bridge-2)