> ## Documentation Index
> Fetch the complete documentation index at: https://laudspeaker.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.
# Sending events to Laudspeaker
> A tutorial for sending your first events to Laudspeaker
### Laudspeaker Event Structure
Laudspeaker supports the ingestion of events, and can ingest at a high throughput. Our endpoint `https://app.laudspeaker.com/api/events/batch/` accepts events in batches. From as little as one event in a batch. Lets start off with an example you can run and then explain what is happening:
You can adapt the following curl example, by adding your api key (found in settings)
```
curl --location 'https://app.laudspeaker.com/api/events/batch/' \
--header 'Authorization: Api-Key [your_key_here]' \
--header 'Content-Type: application/json' \
--data '{
"batch": [
{
"timestamp": "2024-03-15T02:31:05.295Z",
"uuid": "F451DF0A-D713-4076-AE20-41AB1641BC98",
"event": "purchase",
"source": "mobile",
"correlationKey": "_id",
"payload": {
"cart": true
},
"correlationValue": "FBBBCB26-B75E-4342-B40B-568BF879F7C5"
},
{
"timestamp": "2024-03-15T02:31:05.313Z",
"uuid": "A97E8A44-AAB0-45C6-B68D-3CAD9A0ED0DD",
"correlationKey": "_id",
"correlationValue": "FBBBCB26-B75E-4342-B40B-568BF879F7C5",
"source": "mobile",
"event": "agree_to_marketing",
"payload": {
"agreement": true
}
},
{
"correlationKey": "_id",
"source": "mobile",
"uuid": "24291D14-944D-4C7B-B0E4-EC98B8A9DF46",
"correlationValue": "FBBBCB26-B75E-4342-B40B-568BF879F7C5",
"event": "onboarding_started",
"payload": {
"service": "something",
"campaign": "utm-1234",
"tap": "open"
},
"timestamp": "2024-03-15T02:31:05.333Z"
},
{
"source": "mobile",
"correlationValue": "FBBBCB26-B75E-4342-B40B-568BF879F7C5",
"event": "onboarding_started",
"correlationKey": "_id",
"uuid": "46300C36-EB75-483D-9955-555233CE648C",
"payload": {
"service": "MY",
"user": "utm-234",
"tap": "main"
},
"timestamp": "2024-03-15T02:31:05.353Z"
},
{
"source": "mobile",
"correlationKey": "_id",
"correlationValue": "FBBBCB26-B75E-4342-B40B-568BF879F7C5",
"payload": {
"id": 2,
"service": "MY"
},
"timestamp": "2024-03-15T02:31:05.443Z",
"uuid": "C3EE7322-CBA2-49C4-B118-87DD86AAA5D0",
"event": "item_to_cart"
}
]
}'
```
and you should see the resulting events in the event tracker!
### Breaking down the batch of events
A batch consists of an array of events and looks like this:
```
{
"batch": [
{
"timestamp": "2024-03-15T02:31:05.295Z",
"uuid": "F451DF0A-D713-4076-AE20-41AB1641BC98",
"event": "checking_out",
"source": "custom"
"correlationKey": "_id",
"payload": {
"checkout": true
},
"correlationValue": "FBBBCB26-B75E-4342-B40B-568BF879F7C5"
}
]
}
```
Each event in the batch must adhere to the laudspeaker schema, at a minimum each event must contain an **event** field, **correlationKey** field, **correlationValue** field, and a **source** set to **"custom"**
Optionally it should also contain a timestamp, and uuid like below:
```
{
"timestamp": "2024-03-15T02:31:05.295Z",
"uuid": "F451DF0A-D713-4076-AE20-41AB1641BC98",
"event": "checking_out",
"source": "custom"
"correlationKey": "_id",
"correlationValue": "FBBBCB26-B75E-4342-B40B-568BF879F7C5"
}
```
To customize your event with data you want to send, you should include a payload object:
```
{
"timestamp": "2024-03-15T02:31:05.295Z",
"uuid": "F451DF0A-D713-4076-AE20-41AB1641BC98",
"event": "checking_out",
"source": "custom"
"payload": {
"checkout": true
},
"correlationKey": "_id",
"correlationValue": "FBBBCB26-B75E-4342-B40B-568BF879F7C5"
}
```
Putting everything together an event batch could look like:
```
{
"batch": [
{
"timestamp": "2024-03-15T02:31:05.295Z",
"uuid": "F451DF0A-D713-4076-AE20-41AB1641BC98",
"event": "checking_out",
"source": "mobile"
"correlationKey": "_id",
"payload": {
"checkout": true
},
"correlationValue": "FBBBCB26-B75E-4342-B40B-568BF879F7C5"
},
{
"timestamp": "2024-03-15T02:31:05.313Z",
"uuid": "A97E8A44-AAB0-45C6-B68D-3CAD9A0ED0DD",
"correlationKey": "_id",
"correlationValue": "FBBBCB26-B75E-4342-B40B-568BF879F7C5",
"source": "mobile",
"event": "marketing_agreed",
"payload": {
"agreed_to_marketing": true
}
},
]
}
```
### API Endpoint
Our event endpoint is:
`https://app.laudspeaker.com/api/events/batch/`
### Identifying users
We are able to attribute events to the right users by using the correlationValue and correlationKey pair. The correlationKey tells Laudspeaker which unique attribute of a user to use when correlating an event with a user, and for custom events **should always be set to the primary key** of the user. The primary key of your users is set up under the audience tab:
