Honest urgency from real store data: recent buyers, live viewers, low stock and real sale countdowns.
Available Updated Oct 18, 2026Version 1.0.0CS-Cart, Multi-Vendor 4.17.2 – 4.21.x No core file edits
Built for
Urgency & Social Proof Kit: overview1 of 13
What it does
Urgency & Social Proof Kit adds honest social proof to product pages, product lists and the cart: recent buyers in a period you choose, other shoppers viewing the product now, low stock with a bar, a countdown to the real end of a promotion and optional recent-purchase toasts. Every number is read from your orders, stock, promotions and anonymous page signals when the page is shown. Nothing is invented or rounded up. For any CS-Cart or Multi-Vendor store that wants more conversions without fake tricks.
How it works
Install the add-on and the product pages show what is real right away. Choose per element whether it is shown, the period, the minimum, the threshold and your own wording; pick the position on the product page, the badge corner in lists, the accent colour and excluded categories or products. A countdown appears when a CS-Cart promotion with an end date applies to the product or the cart. Recent-purchase toasts are off until you switch them on; customers can opt out in their profile. Reduced motion and screen readers are respected.
Features
Recent buyers: distinct customers in 24 hours to 30 days, from orders in your chosen statuses
Low stock: real stock of tracked products at or below your threshold, with a stock bar
Viewers now: other shoppers with the product open, from anonymous signals, bots ignored
Countdown to the real end date of a promotion, on the product page and in the cart
Recent-purchase toasts from real orders, anonymous by default, customer opt-out
Minimums for every number, so small numbers are never shown
One badge per product in category, search and block lists
Own wording, position, list badge corner, accent colour, exclusions
Full page cache safe: no numbers in cached pages
Respects reduced motion; accessible toasts and countdown
Multi-Vendor and CS-Cart Ultimate (settings per storefront)
CS-Cart, CS-Cart Ultimate and Multi-Vendor, 4.17.2 to 4.21
What you get
Package
kv_urgency_social_proof-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 18, 2026Tested on: Multi-Vendor 4.17.2, CS-Cart 4.17.2, Multi-Vendor 4.21.2
Requirements
Platform
CS-Cart or CS-Cart Multi-Vendor 4.17.2 – 4.21.x
PHP
PHP 7.2.5 – 8.3 (as supported by your CS-Cart version)
Theme
A storefront theme based on Responsive (Responsive, Bright, Nova and most third-party themes)
Requirement
For the low-stock messages: inventory tracking switched on (Settings → General → Inventory) for the products
Core changes
None. Hooks and template overrides only
1.0.0
Oct 18, 2026
Latest
Added 8
Recent sales: distinct customers who bought the product in 24 hours to 30 days, from orders in the selected statuses; minimum; own wording.
Low stock: real stock of tracked products at or below a threshold, stock bar, list badge, cart note.
Viewers now: other shoppers with the product page open, from anonymous signals (daily-rotating hash, deleted after an hour, bots ignored).
Promotion countdown from the real end date of promotions that apply to the product for this shopper, and for promotions applied to the cart.
Recent-purchase toasts (off by default): real recent orders, "Someone" or first initial, optional city, coarse time, customer opt-out in the profile.
Product list badges (low stock or recent buyers), corner setting; product page position setting; accent colour; excluded categories and products.
Full page cache safe loading (one POST per page), reduced-motion support, accessible toasts and countdown.
License client, self-healing upgrades.
Tested on Multi-Vendor 4.17.2, CS-Cart 4.17.2, Multi-Vendor 4.21.2. First release.
Can I show bigger numbers to create more urgency?
No, on purpose. Every number is real. If a product has fewer buyers or viewers than your minimum, nothing is shown. Fake counters and fake countdowns are banned in the EU and other markets and damage trust once shoppers notice.
Why does a product show nothing?
There is nothing real to say yet: fewer recent buyers or viewers than the minimum, stock above the threshold (or not tracked), and no promotion ending within the countdown window. Also check the excluded categories and products.
Why is there no countdown for my sale?
The countdown needs a promotion with an end date (Marketing → Promotions → Available till) that applies to the product for this shopper, and the end must be within the configured number of days (3 by default). Prices set as a "list price" without a promotion have no end date and show no countdown.
How is "viewers now" counted? Is it legal under GDPR?
An open product page sends a small signal once a minute. The add-on stores an anonymous code (a one-way hash of IP address and browser with a key that changes daily), the product and the time, and deletes it after an hour. No cookie is set and nothing identifies a person. The shopper himself is not counted, and bots are ignored.
Do I need consent for the recent-purchase toasts?
They show real orders with at most a first initial and a city. Mention them in your privacy policy; customers can opt out in their profile. For the strictest setting choose Customer shown as: "Someone" and switch off Show the city.
Does it work with the full page cache of CS-Cart 4.21?
Yes. Pages carry no numbers. Each page asks the store once for its numbers, so cached pages stay shared and every shopper sees current data.
Does it slow down my store?
One small request per page (a few indexed queries) and, on product pages, one tiny request per minute while the tab is visible. Nothing runs when the add-on is switched off.
My theme already shows "Only 3 left". Will it show twice?
Switch off Low stock → Badge in product lists or the theme's / other add-on's label, and choose a free image corner in Badge position in product lists.
What happens if the license lapses?
Without a valid license (no key after the 14-day start period, an invalid or revoked key, a domain the license does not cover, or no successful check for 14 days), all urgency and social proof messages are hidden and viewer pings are no longer recorded. Your settings and your customers' opt-outs are kept. Once the license is valid again, everything is back.
The admin panel shows a license notice.
Open Add-ons → Manage add-ons → Urgency & Social Proof Kit: the License card at the top 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 on the License tab and click Check now. See License.
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 changes for 14 days: the add-on keeps working and retries every hour. Only if no check succeeds for 14 days is it switched off until the next successful check.
Does the license check slow down my storefront or checkout?
No. The check runs only in the admin panel or from cron, at most once a day, never while customers browse or check out.
