> ## Documentation Index
> Fetch the complete documentation index at: https://api.basetools.cz/llms.txt
> Use this file to discover all available pages before exploring further.

# Uploading product data

> addInventoryProduct, XML feeds, and how to get internal Base IDs for newly created products

This article covers getting product cards (not prices/stock — see [Updating prices and stock](/en/produkty/aktualizace-cen-a-skladu) for that) into the Base catalog. Building on [Basic principles](/en/produkty/zakladni-principy), here are the three concrete options.

## Option 1 — XML feed import

Base can cyclically import product cards from an XML feed in the **Heureka** or **Shoptet** specification. On request, we can also read custom elements from such a feed, but this currently has to be configured on our side — contact the implementation team.

* Import frequency: typically once a day, up to three times a day for enterprise accounts.
* Downside: in this mode you have no write-side API methods — the feed content drives everything.

## Option 2 — fully via API

If you want to control product creation and updates programmatically, use [`addInventoryProduct`](https://api.baselinker.com/index.php?method=addInventoryProduct). Sending a product with an existing ID updates that card, so the same method handles both creation and updates.

Before creating a product, you need the category and manufacturer IDs (see [Categories, manufacturers and tags](/en/produkty/kategorie-a-vyrobci)) — both are set on the product as a reference to an existing ID, not as text.

## Hybrid option — feed for cards, API just for Base IDs

If you create cards via a feed/e-commerce integration but want to continuously retrieve the internal Base IDs of newly created products (e.g. to hook your own stock sync onto them), use [`getInventoryProductLogs`](https://api.baselinker.com/index.php?method=getInventoryProductLogs) — it returns a log of events for products (and their variants) in the catalog, including newly assigned IDs.

## Sync frequency

| Data type                         | Typical frequency                  |
| --------------------------------- | ---------------------------------- |
| Product card import/update (feed) | \~1×/day (up to 3× for enterprise) |
| Price and stock updates           | \~4–5×/hour                        |

<Tip>
  If you also need to sync delivery times, or have a specific requirement for the feed structure, contact the implementation team — we already have approaches worked out for that.
</Tip>