title: Programmatically checking valid combinations of metrics and dimensions for GA
body: <p>Is there any programmatic way for checking valid combinations of metrics and dimensions?
  Analytics query explorer seem to be detecting it.  Query explorer code is @ <a href="https://github.com/googleanalytics/ga-dev-tools/tree/master/src/javascript/query-explorer" rel="nofollow">https://github.com/googleanalytics/ga-dev-tools/tree/master/src/javascript/query-explorer</a></p>
  
  <p>But by dev. says he can't find a way to it. Thanks in advance.</p>
  
  <p>My API errors have gone to 20% in console with wrong queries. Also google will not allow to Extend API calls with this much errors.</p>