Three values from two different screens: the most common setup mistake
The three values a Trendyol connection needs do not sit in the same place in the Partner panel. The seller ID is under account information, while the API key and secret are on the account → integration information screen. The most common first-time mistake is entering the store number or the account code instead of the seller ID — all three are numeric, but only one is accepted.
Once connected, products can be matched by barcode as well as by stock code. That two-way matching looks like a detail, but it matters when your catalogue contains items without barcodes: where the barcode is missing the stock code takes over and the sync does not break on that product.
Order history is capped at 14 days — know this on day one
When you first connect, orders from the last 14 days can be pulled retroactively; anything older is not listed on this Trendyol endpoint. The expectation that "last month's orders should come too" will not be met. This is the platform's own limit rather than a gap in the integration, and it rarely causes trouble in practice since older orders are already closed — but it is worth knowing so a shorter-than-expected first table does not surprise you.
In exchange, Trendyol is one of the few marketplaces where you can both push your issued invoice PDF back and pull the shipping label as a PDF. With both in place the post-order work collapses into one screen: issue the invoice, print the label, hand over the parcel.
Running Trendyol alongside your own website
The search data shows something interesting: people often look not for Trendyol alone but for Trendyol together with a second system they use — Shopify with Trendyol, Ticimax with Trendyol. The reason is plain: most sellers do not stay on one channel, and the real problem is not setting up a single channel but making two channels share the same stock.
When the two are managed separately, one outcome is inevitable: a product sold on your own site does not decrement on Trendyol, and the same item sells twice. You end up cancelling the second order, which shows up in your seller rating on the marketplace. When both channels feed from the same connection layer, stock comes from a single source and that scenario disappears.
Another commonly searched topic is importing products into Trendyol via XML — a query that has grown noticeably in the last three months. If you receive an XML feed from a supplier, there is an important difference between routing that feed through a central catalogue and connecting it directly to Trendyol: in the first case one feed serves all your channels, in the second each channel needs its own setup.
