arnaud92

MerchantStamp Catalog Audit is the AI-readiness layer for WooCommerce catalogs.
It helps merchants audit catalog quality, enrich missing product schema, and publish AI-ready feeds — without replacing their existing SEO or feed plugin.
Unlike traditional feed plugins focused on channel exports, this plugin focuses on catalog completeness and machine readability for modern AI-driven discovery.
<h4>Fully functional, free, and offline-first</h4>
This plugin is 100% functional locally. Every feature listed below runs on your server with no external service required. There is no time limit, no product cap, no locked feature behind a license key.
<ul>
<li>Full ShopScore audit (no product limit)</li>
<li>Field Coverage Analytics</li>
<li>Top Issues panel (the fields with the most missing values, ranked)</li>
<li>Prioritized Recommendations (actions ranked by estimated ShopScore gain)</li>
<li>JSON-LD enrichment on top of Yoast, Rank Math, or native WooCommerce</li>
<li><code>products.jsonld</code> feed (schema.org Product catalog)</li>
<li><code>llms.txt</code> feed (LLM-friendly catalog summary)</li>
<li><code>acp.json</code> feed (Agent Commerce Protocol)</li>
<li><code>agent.json</code> feed (with SHA-256 content-integrity proof)</li>
<li>Scan history archive (60 most recent scans)</li>
<li>Score Trend sparkline</li>
<li>Compare any two scans (delta score, delta critical missing, per-field coverage diff)</li>
<li>Degradation alerts (banner when ShopScore drops or critical-missing rises)</li>
<li>Automatic feed rebuild on product create / update / delete / stock change</li>
<li>WooCommerce admin dashboard</li>
<li>Full HPOS compatibility</li>
</ul>
<h4>Optional external service</h4>
The plugin can optionally connect to the MerchantStamp service for capabilities that genuinely require a centralized backend. The plugin works entirely without it.
What the service adds (Guideline 6 — Serviceware):
<ul>
<li>Centralized multi-site dashboard — manage catalog quality across multiple WooCommerce stores from one place</li>
<li>Cross-site verification key — published at <code>merchantstamp.com/.well-known/keys/<slug></code>, referenced inside <code>agent.json</code> so AI agents can verify the integrity of your published feed against a public key you control</li>
<li>Storefront discovery loader — a small JavaScript snippet (versioned, SRI-protected, opt-in) injected in the footer that helps AI agents find this site’s feeds at scale</li>
<li>Advanced alerting — Slack and email delivery of degradation alerts, beyond the in-admin banner that this plugin shows for free</li>
<li>Push notifications to your MerchantStamp dashboard after each rebuild</li>
</ul>
Pricing for the MerchantStamp service is at <a href="https://merchantstamp.com" rel="nofollow ugc">merchantstamp.com</a>.
<h4>Built to work alongside your stack</h4>
<ul>
<li>Yoast SEO / Yoast WooCommerce SEO</li>
<li>Rank Math / Rank Math PRO</li>
<li>AIOSEO</li>
<li>Google for WooCommerce</li>
<li>Product Feed PRO for WooCommerce</li>
<li>Any WooCommerce-compatible theme</li>
</ul>
If another plugin already outputs valid schema, this plugin does not overwrite it. It fills missing fields only.
<h4>Read-only by design</h4>
This plugin does not rewrite your WooCommerce product catalog. It reads your product data, computes scores, enriches structured output at render time, and generates feed files from existing catalog data.
<h4>External services</h4>
This plugin connects to MerchantStamp services only when the user enters an API key. Without an API key, no external connection is ever made.
When a user enters a MerchantStamp API key, the plugin connects to:
1. MerchantStamp Activation & Push API
<ul>
<li>Endpoint: <code>https://merchantstamp.com/api/webhooks/plugin</code></li>
<li>Purpose: Validate the API key on activation, and report feed-build status after each rebuild so the merchant’s MerchantStamp dashboard stays in sync.</li>
<li>Data sent: site URL, plugin version, WordPress version, WooCommerce version, the merchant’s chosen slug, public feed URLs, total product count, average ShopScore, build duration in milliseconds, and a UTC timestamp.</li>
<li>No personal data, customer data, or order data is ever sent.</li>
<li>Terms of service: https://merchantstamp.com/en/legal</li>
<li>Privacy policy: https://merchantstamp.com/en/privacy</li>
</ul>
2. Optional Storefront Loader Script
<ul>
<li>URL: <code>https://merchantstamp.com/js/silver-loader.v1.0.0.js</code></li>
<li>Purpose: A small JavaScript file injected in the site footer (only when an API key is entered AND the filter <code>msca_inject_loader</code> is true) that helps AI discovery systems find this site’s published feeds.</li>
<li>Source code: https://github.com/arnaud-92/silver-loader</li>
<li>Subresource Integrity: loaded with an SRI hash so the browser refuses to execute any modified copy.</li>
<li>
Opt-out: site owners can disable the loader injection at any time by adding the following filter:
add_filter( ‘msca_inject_loader’, ‘__return_false’ );
</li>
</ul>
<h4>Privacy</h4>
<ul>
<li>Without an API key entered, this plugin sends no data to any external service.</li>
<li>With an API key, the plugin sends only operational metadata listed in the External services section above.</li>
<li>No customer data, order data, email addresses, IP addresses, or other personal information is collected, stored, or transmitted by this plugin.</li>
<li>All generated feed files contain only public product information already published on the merchant’s WooCommerce store.</li>
<li>Plugin settings are stored in the standard WordPress options table; no custom database tables are created.</li>
<li>Scan history and cache are stored under <code>wp-content/uploads/merchantstamp-catalog-audit/private/</code> (created with index.php silencers and <code>.htaccess</code> denial rules).</li>
</ul>

MerchantStamp Catalog Audit for WooCommerce

Make your WooCommerce catalog readable by ChatGPT, Gemini, Claude, and AI shopping agents. Free audit + 4 AI-ready feeds, no limits.

Automattic

WooCommerce

Google

Effortlessly sync your WooCommerce product feed across Google and be seen by millions of engaged shoppers with the Google for WooCommerce extension. Download and setup takes just five minutes.
Grow your business with $500 in Google Ads credit
To help you get started running campaigns, you can get $500 in ad credit when you spend your first $500 on Google Ads within 60 days.
Terms and conditions apply.
Sync your WooCommerce product feed to Google Merchant Center
Seamlessly integrate your WooCommerce store with Google and set yourself up for success.
<ul>
<li>
Sync your WooCommerce product feed to Google Merchant Center in just a few clicks. With our API-integrated Product Sync feature, all the data and functionalities from your WooCommerce store will be linked to Google with seamless server-to-server connection.
</li>
<li>
Have your product listings automatically updated in real time so your prices, promotions, inventories, and other product details stay accurate and synchronized across all your listings.
</li>
<li>
Access all the tools and features you need to manage your WooCommerce store and grow your business — centralized in one place.
</li>
</ul>
Find the right audiences and sell to high-intent customers with Google Ads
Now your WooCommerce store is discoverable on Google – and you’re ready to launch a Google Ads campaign!
<ul>
<li>Put Google AI to work for you by launching a Google Ads Performance Max campaign. Combined with your unique business insight, Performance Max can help you reach high-value customers using optimized placements, bidding, and more – all aligned with your budget and specific goals.</li>
<li>Showcase your products across Google Shopping, Search, YouTube, Gmail, Maps, Display, and Discover – from a single campaign. Manage all your Google Ads campaigns from your WooCommerce dashboard and on the WooCommerce Mobile App.</li>
<li>Save time and effort by using Google AI to help scale your asset creation. Performance Max will not only create additional copy and images based on the creative you upload, but also mix and match them for the best performing ad combinations.</li>
</ul>
Get custom insights and improve your conversions using Google tag
Once you’re running Google Ads campaigns, the Google tag feature in the extension enables conversion tracking to give you insights — so you can test and learn what works, and fine-tune your strategy.
<ul>
<li>Easily adjust your product listings in real time to reflect your learnings and business expertise. While the extension maps product attributes by default, it’s simple to modify if you’d like more control.</li>
<li>Leverage automatic Google tagging and conversion tracking to measure what’s working and what’s not. With insight into your customers’ purchase journey, you’ll be able to pinpoint how effectively your ads translate into valuable customer activity.</li>
<li>Take your conversion tracking further with enhanced conversions — a feature designed to improve your measurement accuracy by collecting privacy-conscious data without the need for third-party cookies. So you have the right data to help make your campaign more effective.</li>
</ul>

Google for WooCommerce

This plugins is laking features which make it useless in most instances. For one there is no way to map or use GTIN/MPN numbers from Woocommerce, no guidance on what fields to use for that, and most products will be invalidated by merchant center without that. Also, there is no way to setup local inventory feed, no mention of it, and again no information on how to proceed so another Feed plugin is needed just for that, which at that point begs the questions why have two plugins installed? The only real use of this plugin is that you can sort of manage ads from the plugin, but again there are a lot of tasks that can't be done so still need to login to Google Ads.  I have found in the 2 installations I tried to use it I had to uninstall it and go back to feed plugins that mapped GTIN to either SKU or a GTIN field and did local inventory feeds.

Sorely Lacking Features


It may take you some time to set everyting up, but automatic updates of your products worth it. And looks like the plugin support does its job well.



I am a bit concerned about no activity indicator and no opportunity to choose product categories + it would be nice to have an opportunity to set title and description attributes to other fields (e.g. custom fields). That would be great!


Useful, usable, takes time


If you have a Google Merchant Center account with multiple websites in it, sub-accounts, this plugin does not work.  It makes you connect your email for your Google Account, then only provides an option to create a new single account, even though we already have everything set up as a sub-account under a parent account.



It should just let you connect the parent account, then select which sub-account you want to use, just like every Google Analytics plugin has, but it doesn't have it.



When will this be supported?  This is useless for us otherwise.


Does Not Work with Advanced Google Merchant Acct (Multi Website Sub accounts)


This worked great for a few months but I just checked my merchant account to see this is no longer pushing over products. I have 1 active product and 43 unsynced ones for no reason I can determine. No errors on either end; it's just no longer working.


No Longer Working


Ok. So I have to make an account first at Wordpress.com ? Too many steps. I just wanted to connect my WordPress site to Google ads, not create yet another account somewhere. Just for login in to Google I have to write password + get sms with a code and write that also. I'm not going to create yet another account somewhere. Too much work for too little. 


Too much work


not sure how people are 1 staring lol it was close to the easiest set up ever in moments i had my products on google for free ... the free side worked so well for me ( 5 sales 2nd day all google referral clicks ) i paid in to a campaign just to see how much more of a diff it makes . thanks devs 






Works as it should easy free ads on google shopping

Native integration with Google that allows merchants to easily display their products across Google’s network.

MerchantStamp Catalog Audit for WooCommerce vs Google for WooCommerce