Complete rich results, robots and canonical rules, social cards, FAQs and AI search files on top of the CS-Cart SEO add-on.
Available Updated Oct 14, 2026Version 1.0.1CS-Cart, Multi-Vendor 4.17.2 – 4.21.x No core file edits
Built for
SEO Pro Suite: Rich Snippets, Canonical, Hreflang & llms.txt: overview1 of 20
What it does
SEO Pro Suite is for stores that want more from search, social and AI results than the core SEO add-on gives:
It extends the core output instead of duplicating it, on 4.17 to 4.21.
What it changes for your store
Shipping and return details make products eligible for richer Google results.
FAQs answer buyers on the page and feed AI assistants.
Noindex for sorted and search pages keeps crawl budget on pages that sell.
Complete social cards give every shared link an image, title and price.
Llms.txt and crawler rules decide how AI tools use your catalog.
The page check finds missing GTINs, brands and descriptions before Google does.
How it works
Install it, review the settings and the storefront prints the extra tags at once. The add-on completes the product markup of the core SEO add-on and adds its own items in the same place, so there is never a second Product block.
Add questions on the SEO Pro tab of a product, category or page; they show as an accordion and as FAQ data.
On Website > SEO Pro Suite, check any page, see catalog gaps, write AI crawler rules to robots.txt and preview llms.txt.
GTIN from barcode-like product codes, MPN and brand fallbacks, catalog coverage report
FAQPage, WebSite, BlogPosting, OnlineStore, Organization and breadcrumb markup
FAQ editor for products, categories and pages, vendor editing on Multi-Vendor
Robots rules for paginated, sorted, search, out-of-stock, empty and vendor pages
Per-product, category and page robots override
Canonical links where the core has none, removed from noindex pages
Hreflang region codes, x-default and exclusions
Open Graph and Twitter cards with product price and availability
Generated llms.txt and AI crawler policy for robots.txt
Page check with required and recommended properties
Multi-Vendor, Ultimate storefront settings and full page cache support
What you get
Package
kv_seo_pro_suite-1.0.0.zip, installed through Add-ons → Manage add-ons
Updates & support
12 months included. Download new versions from your account and install them in Add-ons → Manage add-ons or the Upgrade Center.
License
1 production installation. Staging, dev and localhost are free and unlimited. The add-on keeps working after the update period ends. How licensing works
Compatibility
We list only the builds we install and test on. “Tested” means the full test plan was run on that build; “Supported” means the build is inside the supported range and uses the same hooks.
CS-Cart version and edition compatibility
CS-Cart version
CS-Cart
CS-Cart Ultimate
Multi-Vendor
Multi-Vendor Ultimate
4.22 and later
Testing next
Testing next
Testing next
Testing next
4.21.2
Supported
Supported
Tested
Supported
4.20.x
Supported
Supported
Supported
Supported
4.19.x
Supported
Supported
Supported
Supported
4.18.x
Supported
Supported
Supported
Supported
4.17.2
Tested
Supported
Tested
Supported
Before 4.17.2
Not supported
Not supported
Not supported
Not supported
Last tested build: Multi-Vendor 4.21.2, Oct 14, 2026Tested on: Multi-Vendor 4.17.2, CS-Cart 4.17.2, Multi-Vendor 4.21.2
Requirements
PHP
CS-Cart and Multi-Vendor 4.17.2 – 4.21.x (tested on CS-Cart 4.17.2, Multi-Vendor 4.17.2 and Multi-Vendor 4.21.2 with PHP 8.3)
PHP
PHP 7.4 – 8.3, as supported by your CS-Cart version
Platform
The SEO add-on of CS-Cart, active (it is installed and active by default)
Requirement
Administrator access to the store's admin panel
Core changes
None. Hooks and template overrides only
1.0.0
Oct 14, 2026
Latest
Added 12
Product rich results on top of the core SEO add-on: item condition, seller, merchant return policy, shipping details, price validity, GTIN from barcode-like product codes, MPN and brand fallbacks (also on offers inside an AggregateOffer).
Structured data: FAQPage, WebSite, BlogPosting, OnlineStore (Multi-Vendor vendor pages), BreadcrumbList and Organization on versions before 4.21; on 4.21 the core Organization item is completed with address, phone, e-mail, profiles and contact point.
FAQ editor on the SEO Pro tab of products, categories and pages, shown as an accordion on the storefront; vendors can edit the FAQs of their products (setting).
Robots rules for paginated, sorted and search result pages, out-of-stock products, empty categories and vendor pages; per-object robots override; large-preview directives.
Canonical links on information pages, blog posts and vendor pages; canonical and prev/next removed from noindex pages.
Hreflang control: region codes, x-default language, exclusions, or off.
Open Graph and Twitter (X) cards for every page type, with product price and availability; replaces the partial tags of the Social buttons add-on.
Generated /llms.txt (store facts, categories, popular products, pages); content of the 4.21 core llms.txt editor takes precedence.
AI crawler policy written to robots.txt as a marked block (allow, block AI training, block all, custom user agents).
Website > SEO Pro Suite: page check with Google's required and recommended properties, catalog coverage, robots.txt and llms.txt tools.
Domain-bound license check with the license card, badge and status bar.
Self-healing upgrades (Upgrade synchronizer).
Tested on Multi-Vendor 4.17.2, CS-Cart 4.17.2, Multi-Vendor 4.21.2. First release.
Does it replace the CS-Cart SEO add-on?
No. It needs it. The SEO add-on keeps building SEO URLs, canonical links, the robots rules for filters and checkout, hreflang links and the Product markup. SEO Pro Suite completes and controls that output and adds what is missing.
Will Google see two Product blocks?
No. The add-on adds its properties to the Product item of the core SEO add-on. Only page types the core does not describe get new items (FAQPage, WebSite, BlogPosting, OnlineStore, and on versions before 4.21 BreadcrumbList and Organization).
CS-Cart 4.21 already has JSON-LD. What does the add-on add there?
4.21 prints Product, BreadcrumbList and an Organization item with the fields from Website → SEO → JSON-LD. The add-on adds the merchant-listing properties to products (condition, seller, return policy, shipping, price validity, GTIN fallback), the address and contact point to the Organization, and FAQPage, WebSite, BlogPosting and OnlineStore items. It does not print a second breadcrumb or organization block.
Where do GTIN and brand come from?
From the core: a product feature with the feature code GTIN, MPN or ISBN, and the product's brand feature. If those are missing, the add-on can use a barcode-like product code as GTIN (valid check digit only), the product code as MPN, and the storefront or vendor name as brand. Website → SEO Pro Suite → Catalog coverage shows how many products still lack them.
Will FAQ rich results appear in Google?
Google shows FAQ rich results only for a small set of authoritative sites. The FAQ is still useful: it answers buyers' questions on the page, it is read by AI assistants and AI search, and the markup is valid. The add-on shows FAQs to visitors exactly as in the markup, as Google requires.
Does noindex on sorted pages hurt my rankings?
No. Sorted listings show the same products as the unsorted page, which stays indexable with its canonical link. The add-on uses noindex, follow, so links on those pages are still followed.
What is llms.txt?
A proposed standard (llmstxt.org): a Markdown file at /llms.txt that summarises a site for AI assistants. The add-on generates it from your catalog and keeps it current. On CS-Cart 4.21 plans that include the core llms.txt editor, text you enter there is served instead.
Should I block AI crawlers?
It is your choice. Block AI training, allow AI search keeps your store visible in ChatGPT search, Perplexity and similar tools (they link to you) while asking training crawlers to stay away. robots.txt is a request that reputable crawlers follow; it is not an access control.
The AI crawler block is not in my robots.txt.
Click Write to robots.txt on Website → SEO Pro Suite; the policy is not written automatically. If the page says robots.txt is not writable, make the file in the store root writable or copy the block into it.
Does it work with the CS-Cart 4.21 full page cache?
Yes. Nothing the add-on prints depends on the visitor, it writes nothing while visitors browse, and cached pages are refreshed when FAQs or settings change.
Does it work with Multi-Vendor?
Yes. Offers name the vendor as seller, vendor pages get OnlineStore markup, a canonical link and an optional noindex rule, and vendors can edit the FAQs of their own products.
The add-on's tags disappeared and the admin panel shows a license notice.
Open Add-ons → Manage add-ons → SEO Pro Suite → Settings → License. The status line says what is wrong: no key, a key for another add-on, a revoked license, or a domain that the license does not cover. Fix it and click Check now. See License.
What happens to my settings and FAQs while the license is not valid?
They are kept and you can still edit them. The storefront output of the add-on stops; the core SEO add-on keeps working, so your store keeps its SEO URLs, canonical links and basic structured data. Everything comes back as soon as the license is valid.
Does the add-on work on my staging copy?
Yes. Subdomains of your licensed domain (for example staging.example.com) and local development hosts (localhost, private IP addresses, .local, .test) are covered by the same license.
What happens if your license server is down?
Nothing visible: the add-on keeps the last verified result and keeps working for 14 days while it retries. The admin panel shows a notice from the first failed check.
Does the license check slow down my storefront?
No. The check runs in the admin panel or from cron, once a day. The storefront only reads the stored result.
Add a released add-on to this order and save 15% on it. It uses the same edition and store domain.
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