The Snapchat Conversions API only supports sending Event Types that are in the[predefined`event_type` list](https://marketingapi.snapchat.com/docs/conversion.html#conversion-parameters){:target="_blank"}. This includes custom events. You must use`CUSTOM_EVENT_1`,`CUSTOM_EVENT_2`,`CUSTOM_EVENT_3`,`CUSTOM_EVENT_4`, or`CUSTOM_EVENT_5` as the Event Type. Events sent with an invalid event type will fail with an`Unrecognized event type` error.

It's possible to send details of either single or multiple products / items in a single conversion event.

Single product / item: Use the 'Item ID', 'Item Category', 'Brand', 'Number of Items' and 'Price' fields.

Multiple products / items: Use the 'Products' field which accepts an array of products / items.

To match visitor events with Snapchat ads, Snap requires that one or a combination of the following parameters are sent to the Conversions API:

- Email