B2B Request a Quote (RFQ) for CS-Cart and Multi-Vendor

What it does

B2B Request a Quote (RFQ) is for stores that negotiate prices with business buyers:

No external service: quotes, messages and files stay in your store.

What it changes for your store

Every request has a status, an owner and a full history.
Discount % or unit price per product, with live totals.
Quantity breaks invite larger orders.
Validity dates create urgency and protect your margins.
Accepted offers go straight to checkout, with shipping, taxes and payment as usual.
Quoted prices are checked on the server and can be ordered once.
Vendors answer quotes for their own products, which saves the marketplace team time.

How it works

Buyer

Adds products with options and quantities to the quote list, sends it with company details, a message and files, and gets a confirmation e-mail. The offer arrives by e-mail and in My quotes; the buyer accepts and checks out, asks for changes or declines.

Staff

Opens the request, sets quantities, prices or discounts, quantity breaks, a validity date and a shipping note, and sends the offer.

Multi-Vendor

A request is split per vendor and each vendor answers in its panel.

Features

Quote button next to or instead of "Add to cart", per store, category or product
Price on request: hide prices from guests or any user group
Quote list with options, quantities, line notes, company fields and attachments
Guest requests with signed e-mail links, and My quotes for customers
Offer editor with unit price or discount, offered quantity and quantity breaks
Validity dates with automatic expiry, shipping and delivery note
Message thread with attachments and internal notes
Accept, ask for changes or decline from the quote page
Checkout at the quoted prices, enforced on the server and orderable once
Printable quote for print or PDF
E-mail and admin notifications with editable templates
Multi-Vendor quote split and vendor panel, Ultimate storefront settings
Full page cache support, CAPTCHA support and REST API

What you get

Package	kv_b2b_quote_request-1.1.0.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 13, 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
Requirement	Administrator access to the store's admin panel
Core changes	None. Hooks and template overrides only

1.1.0

Oct 13, 2026

Latest

Added 5

License check. Enter your license key (or CS-Cart Marketplace license number) on the new License tab of the settings. The add-on verifies it with cs-cart.kaviolabs.com when the key is saved and then once a day, only from the admin panel or cron, never on storefront requests. The license covers the domain entered at purchase and all its subdomains; local development hosts are always allowed.
License card at the top of the add-on page, visible on every tab: the status in color (valid, development host, pending or grace period with the days left, Marketplace number pending verification, or switched off: not activated, invalid key, revoked, domain mismatch, not verified), what is switched off in plain words, the licensed domain, the result per storefront, the end of the updates period and the last and next check. Actions: Enter/Change license key, Check now, Manage license and, without a valid license, Buy a license. A cron entry point checks without the admin panel.
License badge next to the add-on name in Add-ons → Manage add-ons (for example License: Valid or License: Pending · 9 days left). Only administrators who may manage add-ons see license information; vendors never do.
License status bar on the add-on's own admin pages (quote list and quote page): a small green chip when the license is valid, or a banner with the status, what is switched off and the actions.
Without a valid license for the store's domain, customers can no longer send new quote requests: the "Request a quote" buttons and the quote list are hidden and hidden prices are shown normally. Existing quotes stay readable in the admin panel and in the customer account, and accepted quotes that have not expired can still be checked out at the quoted price. The admin panel shows a notice on other admin pages (the add-on page shows the card and the add-on's own pages the status bar instead). New installations and upgrades from 1.0.x work for 14 days before a key is required, and if the license server cannot be reached the add-on keeps working for 14 days.

Fixed 1

Singular and plural forms ("1 product", "You have 1 offer waiting") instead of "product(s)" and "offer(s)" in the customer quote list (new language variables, so in-place upgrades add them).

Tested on Multi-Vendor 4.17.2, CS-Cart 4.17.2, Multi-Vendor 4.21.2. No breaking changes.

1.0.0

Oct 13, 2026

Added 11

"Request a quote" button next to or instead of "Add to cart", set for the store, per category and per product.
Hidden prices ("Price on request") for chosen user groups, including guests.
Quote list with options, quantities, line notes, company and contact fields, message and attachments; guest requests with signed links.
My quotes in the customer account with seven statuses and a message thread with attachments and internal notes.
Offer editor: unit price or discount, offered quantity, quantity breaks, validity date, shipping note and message.
Accept and check out at the quoted prices (server-side checks on every cart calculation, orderable once), ask for changes, decline, automatic expiry.
Printable quote for print or PDF (storefront and admin).
Notification events and e-mail templates for customers, staff and vendors.
Multi-Vendor: requests split per vendor, vendor panel with own quotes only.
CS-Cart Ultimate: settings and quotes per storefront.
Full page cache support (4.21), CAPTCHA support for guest requests, REST API entity kv_b2b_quotes.

Tested on Multi-Vendor 4.17.2, CS-Cart 4.17.2, Multi-Vendor 4.21.2. First release.

Can customers change the quoted price in the cart?

No. The cart line only carries a reference to the quote. On every cart calculation the add-on reads the price, the product, the options and the quantity rules from the database and checks that the visitor owns the quote and that it is accepted and not expired. Changed or invented values are ignored, and lines that no longer match are removed from the cart.

Can a quote be ordered twice?

No. Placing the order switches the quote from Accepted to Ordered in one database step; a second cart (another browser, another tab) is refused. To sell again at the same prices, send a new offer from a new request, or set the status back by hand.

Can a customer buy only one product of a multi-product offer?

No. A quote is ordered as a whole with the offered quantities (or more, if you added quantity breaks). Remove a product from the offer before you send it if the customer only wants part of it.

How do I make some products "price on request" for everyone?

Set Hide prices from to Guest and Registered (and your own customer groups), and set the quote button to Quote only or Next to "Add to cart" for those products or categories. Products with Do not show keep their prices.

How do I show prices only to signed-in customers?

Tick Guest in Hide prices from. Guests see "Price on request" and a "Request a quote" button; registered customers see prices and can buy. This works with the full page cache because all guests share the same page.

Do quotes work with my shipping methods, taxes and payment methods?

Yes. Accepting an offer puts the products in the normal cart; shipping, taxes, coupons, cart promotions and payment are calculated by CS-Cart at checkout. Use the shipping note for agreements such as free delivery, or adjust the unit prices.

What happens on Multi-Vendor when the list has products from several vendors?

The request is split into one quote per vendor. Every vendor sees only its quote in the vendor panel and sends its own offer. The customer can accept each offer; the products go to one cart and the order is split per vendor as usual.

Can guests use it?

Yes, unless you turn off Guests can request quotes. Guests enter their e-mail address and get a signed link to their quote. Only the browser that opened the link (or the one that sent the request) can buy at the quoted prices.

Where are the attachments stored?

In var/custom_files/kv_b2b_quote_request, which is not reachable from the web. Files are only sent after an access check, and their type and content are checked on upload.

Does it create PDF files?

The quote page has a Print / PDF link that opens a clean printable page; use the browser's "Save as PDF". No PDF service is needed.

Does it work with the CS-Cart 4.21 full page cache?

Yes. The button and hidden prices depend only on user groups, the per-visitor parts (quote list counter, account menu) are rendered per visitor, and the quote pages are never cached.

Does it work with the Catalog mode or Call requests add-ons?

Yes. With Catalog mode, the quote button appears next to Catalog mode's "Buy now" link, and quote-only products show the quote button instead. The "Buy now with one click" button of Call requests appears next to the quote button.

Customers no longer see the "Request a quote" button and the admin panel shows a license notice.

Open Add-ons → Manage add-ons → B2B Request a Quote (RFQ) → 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 existing quotes while the license is not valid?

They are kept. You can still open, edit and answer them in the admin panel, and customers can still read them in their account. Customers cannot send new requests, messages or change requests. Accepted quotes that have not expired can still be added to the cart and checked out at the quoted price, so offers your customers already accepted are honoured.

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.

InstallationRequirements, Install the add-on, Optional: show the quote list in the header, Update, Uninstall ConfigurationGeneral, Per category and per product, Attachments, Notifications, CAPTCHA for guests, License UsageFor customers, For the store team Developer notesFiles and data, How quoted prices are enforced, Hidden prices and the button, Full page cache (CS-Cart 4.21), Notifications, Core hooks and schemas used for licensing FAQ17 answers to common questions.

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B2B Request a Quote (RFQ)

What it does

What it changes for your store

How it works

Buyer

Staff

Multi-Vendor

Features

What you get

Compatibility

Requirements

Added 5

Fixed 1

Added 11

Details

Support

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