started_basket

A visitor started shopping: the first item went into an empty basket.

Sent once per basket, before the first added_to_basket. order_id is the shop's order id for the basket when it has one already (Weeztix assigns it at once), so the basket, its items, the details and the payment join the completed_order that follows. Not banner-exempt: before analytics consent nothing is known about the visitor, and an abandoned basket without an identifier cannot be followed up anyway.

Sent with	browser, server, platform keys (see write keys)
Mode	strict: exactly the declared fields; an undeclared key, a wrong type or a missing required key quarantines the event
Version	1 (_schema_version on the stored row)
State	active
Required fields	none
Revenue	none: the revenue block is refused
Identity evidence	none
Before consent	no

Fields

The activity's own fields, sent as features. Identifier and attribute fields are moved out of features by the processor; see identifiers and attributes.

Field	Type	Required	What happens to it	Meaning
event_ids	array of string	no	stays in features	The events the order's tickets are for; an order can span events, so completed_order itself has no _event_id.
order_id	string	no, may be null	stays in features	The order in the ticketing system, as its own id. The same value on every activity derived from one order, so they can be joined.
shop_id	string	no, may be null	stays in features	The shop the basket is in.
source_system	string	no, may be null	stays in features	The system the order is being made in, when the shop is not Eventix's own.

Example

One activity in a batch to POST /v1/activities, with debug so the answer says what the processor made of it. The envelope page explains every top-level field.

{
  "batch": [
    {
      "activity_id": "0192f1a4-d49c-7134-8000-d49c13440000",
      "activity": "started_basket",
      "ts": "2026-10-17T20:00:00+02:00",
      "anonymous_customer_id": "evx_web_8f21c0",
      "features": {
        "order_id": "1f2d3c4b-0000-4000-8000-000000000001",
        "shop_id": "shop_01M4XVBYC3FGXCPFRZEPGV20RZ",
        "event_ids": [
          "3a114ef5-6105-48fd-aafc-0ae609d0536c"
        ],
        "source_system": null
      }
    }
  ],
  "debug": true
}

Try it

Sends this request from your browser. The key and the endpoint are kept in this browser only.

ServiceWrite key

POST /v1/activities{ "batch": [ { "activity_id": "0192f1a4-d49c-7134-8000-d49c13440000", "activity": "started_basket", "ts": "2026-10-17T20:00:00+02:00", "anonymous_customer_id": "evx_web_8f21c0", "features": { "order_id": "1f2d3c4b-0000-4000-8000-000000000001", "shop_id": "shop_01M4XVBYC3FGXCPFRZEPGV20RZ", "event_ids": [ "3a114ef5-6105-48fd-aafc-0ae609d0536c" ], "source_system": null } } ], "debug": true }

Versions

Version	Mode	Key classes	Change
1 (current)	strict	browser, server, platform	first version

A published version never changes; a change is a new version, and every stored row says which version it was checked against.