Content API to Merchant API: Does Your Google Merchant Center Store Need to Act?

Maybe Google emailed you about the Content API to Merchant API move, or a plugin showed a warning that your products “will stop showing on Google”, and you don’t know if any of it applies to you. Here’s the fact behind the emails: The Content API for Shopping reached its sunset on August 18, 2026. (Google’s Merchant API updates page). For most store owners that changes nothing. For a few, it’s the reason prices and stock have quietly stopped updating in Merchant Center.

Update, 28 October 2026: Google has since published a timetable for what happens to tools still on the old API, and its Shopify help page now answers more questions. Both are in a second update note further down. The rest of this post is as written on 28 August.

What are the Content API and the Merchant API?

They are two ways for software to talk to Merchant Center. Software, not people: a feed app, a plugin, an agency’s tool or a developer’s script uses one of them to send your products, prices and stock to Google.

• The Content API for Shopping is the old one. Google announced a year ago that it would end on 18 August 2026.
• The Merchant API is the new one. Google calls it the successor, and every tool that sends data by API has to use it now.

If you never wrote code and never hired someone to connect a custom feed, you don’t call either API yourself. Your app or plugin does. So the real question is whether the tool between your store and Google has moved.

Who needs to act on the Content API to Merchant API move?

Google’s developer pages tell developers to move their integrations to the Merchant API as soon as possible. Our reading of who that means, in store-owner terms:

Probably you need to act if:

1. A developer built a custom feed that pushes products to Merchant Center from your own system, ERP or inventory software.
2. An agency or freelancer runs a tool or script that updates your prices, stock or titles in Merchant Center, for example a Google Ads script or a sheet with a custom script attached.
3. You use an old plugin or feed app that hasn’t been updated in a while, or one you stopped using but never disconnected.
4. You use a third-party feed tool and haven’t seen anything from it about the Merchant API.

Probably you don’t need to act if:

1. You use Shopify’s Google & YouTube app. Google’s help page for Shopify users says No action needed. and that the Content API to Merchant API migration will be handled by Google. (Google’s Shopify sync page).
2. You use Google for WooCommerce and keep it updated (details below).
3. You upload a product file, let Google fetch a feed file on a schedule, or use a Google Sheet as your data source in Merchant Center. Our reading: these send a file, not API calls, so the move doesn’t touch them.
4. Google adds your products automatically from your online store. Google reads your pages for this, so there is no API in between.

If Google emailed you about “active Content API calls”, something connected to your account was using the old API when Google looked. That can be a plugin you forgot about, an app you uninstalled years ago, or an agency’s tool. The email alone doesn’t tell you which one.

How do I check which tools send my products to Google?

Merchant Center lists every source of product data in one place. Google’s upload page says product sources sit under Data sources in the Settings menu.

1. Open Merchant Center, go to Settings, then Data sources, and look at the product sources tab.
2. For each source, note how it gets data: a file, Google Sheets, an app or platform, or the API. Write down which tool owns each one.
3. Look at when each source last updated and how many products it holds. A source that hasn’t updated since mid-August, while your store kept changing, is the one to chase.
4. Don’t judge by the label alone. A source can keep the name “Content API” after the tool behind it has switched (see the WooCommerce section).
5. For any source run by a third party, ask the provider in writing whether it now uses the Merchant API, and since when.
6. For any source run by your own code, send your developer Google’s migration guide. That part is developer work.

Before the deadline, Google also offered developers a form to ask for extra time on the old API. That buys time; it doesn’t remove the need to move.

What does it look like when a tool is still on the old API?

Our reading, from how feeds behave when updates stop arriving:

• Prices and stock in Merchant Center stop changing while your website keeps changing.
• A data source’s “last updated” date stops moving.
• Products start getting price or availability mismatch warnings, because Google’s copy is older than your pages. Our guide to a feed that doesn’t match your website covers those warnings.
• New products never appear, or the product count drops. If products are missing, work through products not showing on Google as well.
• Your feed tool shows sync errors or sends you failure emails.

None of these signs proves the API is the cause. Feeds break for many other reasons, as one of the cases below shows.

What should Shopify, WooCommerce and other stores do?

Shopify

If your products reach Google through the Google & YouTube app, Google says the move is on its side. Leave the app installed and connected. Our reading: reinstalling it to “force” the move is the wrong instinct, because merchants have reported new product IDs after a reinstall. Our Shopify and Merchant Center guide covers the sync problems that do need you.

If you use a separate feed app as well, or instead, ask that app’s developer about the Merchant API. The Google & YouTube answer only covers the Google & YouTube app.

WooCommerce

The plugin’s changelog lists version 3.8.0, released on 21 July 2026, as the one that moves product sync to the Merchant API (Google for WooCommerce on WordPress.org). WooCommerce’s documentation says: Please update your Google for WooCommerce extension to version 3.8.1 or later to transition to the Google Merchant API. The same page says your data source may still show “Content API” in Merchant Center after the update.

If you use a different feed plugin, find out whether it sends a feed file or calls Google’s API. A file-based plugin isn’t affected. An API-based one needs an update from its developer.

Other platforms

If your platform has its own built-in Google channel, the platform runs that connection, so the move is its job. Our reading: check your platform’s help pages or changelog for a Merchant API note, and contact support if there’s none. If you send products another way (a file, a sheet, a feed tool), use the checklist above.

What we see in real cases

Paraphrased from public merchant forum threads before 28 August, with no names or stores.

• In July, a Shopify merchant got Google’s email saying Content API feeds would be switched off in August. They used the Google & YouTube app and feared they’d have to pay for a feed app. Helpers pointed to Google’s help page: the app moves on its own.
• In August, a WooCommerce merchant got a Merchant Center notice about active Content API calls and asked whether their feed plugin was the cause. Its support team replied that the plugin sends a file, not API calls, and that the notice probably came from another plugin or older use of the API.
• In early summer, a Shopify store found some products sitting only in an old Content API source, not in the newer automatic one. Replies warned that IDs would change and recommended paid feed apps. None of those replies came from Google.
• From early August, one market’s feed on a Shopify store dropped to zero products while other markets synced. A helper suggested the Content API sunset. The merchant checked and found that market’s sources had already moved to the Merchant API, so the cause was elsewhere.

Our reading: the emails worry many stores that have nothing to do, and the replies often sell a fix before anyone has checked which tool is involved. Check your data sources first.

A short checklist

1. List every product data source in Merchant Center and the tool behind it.
2. Shopify with the Google & YouTube app: nothing to do; don’t reinstall.
3. Google for WooCommerce: update to 3.8.1 or later.
4. Any other plugin, feed app or agency tool: get a written yes or no on the Merchant API.
5. Custom code: hand your developer Google’s migration guide.
6. Over the next week, compare a few products’ price and stock in Merchant Center with your website, and watch each source’s last update date.

The move only changes how product data travels. Google’s rules for your website, such as visible policies and contact details, are the same as before, so it’s worth making sure those are in order too. The free store check reads those public pages; it doesn’t look at your feed connection.

Update, 28 October 2026: Google’s Content API sunset page (last updated 10 September) now sets out the timetable. From 1 September 2026, requests from tools without an approved extension began failing some of the time, with more failures over time. In early 2027 comes the end: Full shutdown. All endpoints are turned down and all requests fail. Google adds that this timing may change. The page also says, for stores on an ecommerce platform: If you access Merchant Center through an ecommerce platform, your platform partner manages the migration on your behalf. Google’s Shopify page now also says the move doesn’t change product IDs, that you don’t need to reinstall the Google & YouTube app, and that Content API data sources may still appear in Merchant Center during the transition. In October, WooCommerce merchants were still asking on the plugin’s forum whether their store had moved after seeing update notices, so the checklist above still applies.

FAQ

Did the Content API sunset remove my products from Google?

Not by itself. The Content API is one of the ways tools send product data to Merchant Center, so stores whose tool already uses the Merchant API, or that send products by file, Google Sheets or a platform app, carry on as before. A tool still on the old API can stop updating your products, which is why you should check your data sources.

Do I need to do anything if I use Shopify’s Google & YouTube app?

No. Google’s Shopify help page says “No action needed” and that the Content API to Merchant API migration will be handled by Google. Our reading: don’t reinstall the app because of the move.

What do WooCommerce stores need to do?

If you use Google for WooCommerce, update it: WooCommerce asks for version 3.8.1 or later to move to the Merchant API. If you use another feed plugin, check whether it sends a file or calls Google’s API, and ask its support if you can’t tell.

My data source still says Content API. Is that a problem?

Not necessarily. WooCommerce’s documentation says a data source may keep showing Content API after the plugin has switched. Check the source’s last update and its product count rather than its label.

Who has real work to do?

Stores with custom code, a script or a feed tool that calls Google’s API directly. Their developer or provider has to move that integration to the Merchant API using Google’s migration guide.