How can I retrieve the latest sensor values?

To retrieve sensor data you first need the checkId of the sensor. 

To get the latest value for a single check make a GET request to  

https://api.30mhz.com/api/stats/check/{checkId} 

To get the latest value for multiple checks make a POST request to  https://api.30mhz.com/api/stats with an array of checkIds in the body of the request.