API monitoring using splunk

[raivivan]

I have one API : [GET] http:localhost:8080/myservice/fetchdetails. Now, I want to raise splunk alert whenever this API is down for any reason.

So, I have my search query as |eval ['http:localhost:8080/myservice/fetchdetails'] | search status=20* to monitor the API.

But it is not fetching me any result. What should be the search query such that it makes a get call to the  Splunk API and then capture the response status?