Sell on every marketplace from one catalogue

A channel is any place a customer can buy from you: your own shop, a marketplace, a social storefront, a counter in a shop. Adding a second one doubles your reach and quadruples your admin, because the second channel does not know what the first one just sold.

Qwikr connects to six, and its job is narrow and unglamorous — to make sure they agree with each other. Everything else it does for a channel follows from that.

Two-way, and one-way, and why the difference matters

Shopify and WooCommerce are your shop. Qwikr talks to them in both directions: it reads their orders and it writes their stock, and either side can hold the record. That is a genuine partnership, and it is how most merchants arrive — already running a shop they have no intention of leaving.

Marketplaces are different. Amazon, eBay, Etsy and TikTok Shop are places you rent. Your listings there carry ranking, feedback and titles written for how buyers on that specific marketplace search. So Qwikr’s default with a marketplace is deliberately modest: send stock, touch nothing else, until you say otherwise.

The rule that makes it safe

Exactly one system holds the truth about how many you have. Everything else receives that figure. There is no negotiation, no merge, and no last-write-wins — because a two-way stock sync between systems that both think they are right does not converge, it oscillates.

Which system that is, is your choice. Merchants who run a busy Shopify shop usually nominate Shopify. Merchants whose warehouse is the real world usually nominate Qwikr. What matters is that it is one of them and that everybody knows which.

Nothing is written until it can be undone

Marketplace APIs have no undo. Before Qwikr writes anything to an account, it captures that account as it finds it. If the snapshot has not been taken, the push does not happen — it fails closed, and the blocked push queues the snapshot that unblocks it.

This is not a warning you can click through. It is enforced at the point every push has to pass, which is the only place a rule like this survives contact with a bug.

Where the effort actually goes

Connecting an account is an afternoon. The awkward part is deciding which of your products corresponds to which of their listings, and Qwikr matches on barcode first because a barcode match is a fact and a title match is a guess. Where there is no barcode, candidates are put in front of a human rather than adopted silently.

The pages below go through each of these properly — what a connection actually does, what it refuses to do, and the specific traps of each marketplace.