If you want to see an event come through to better understand how an integration works, you can send a simple curl:

curl -X POST -d '{ "$api_key": "YOUR_SANDBOX_REST_API_KEY", "$type": "$transaction", "$user_id": "test_user", "$transaction_id": "573050", "$currency_code": "USD", "$amount": 15230000}' -H "Accept: application/json" https://api.sift.com/v205/events 

Then, visit your developer page to see the result. Or, you can use one of our client libraries to send a quick test event. See sample code you can copy and paste from our API docs (make sure to add in your Sandbox API key and feel free to remove some of the non-required fields to send a smaller event).