Post API help to drop measurements

Have you tried making a POST request with the requisite fields? What language are you working with? In Python you might do something like:

requests.post('http://localhost:8086/query', 
              data={'db': 'kcam',
                    'q': 'drop measurement “Cal_Eye.Device.S1.Press”'})

Or using curl:

curl http://localhost:8086/query \
  -d db=kcam \
  -d q='drop measurement "Cal_Eye.Device.S1.Press"'