diff --git a/lib/sender/spmsender.js b/lib/sender/spmsender.js
index befa752..0781381 100644
--- a/lib/sender/spmsender.js
+++ b/lib/sender/spmsender.js
@@ -123,23 +123,24 @@ function SpmSender (spmToken, processMetricsInterval, metricsApiEndpoint) {
         '&dockerHostname=' + dockerHostName +
         '&containerHostname=' + os.hostname() +
         '&token=' + spmToken
-       // duplicate metrics to a second App
+      // duplicate metrics to a second App
       if (process.env.SPM_MIRROR_TOKEN) {
         self.metricsUrlMirror = metricsApiEndpointVerified + '?agentType=nodejs&v=' + clientVersion + '&host=' + hostname +
-          '&dockerHostname=' + dockerHostname +
-          '&containerHostname=' + containerHostname +
-          '&token=' + process.env.SPM_MIRROR_TOKEN
+        '&dockerHostname=' + dockerHostname +
+        '&containerHostname=' + containerHostname +
+        '&token=' + process.env.SPM_MIRROR_TOKEN
       }
     } else {
       logger.log('debug', 'warning, failed to get docker hostname: ' + err)
       self.metricsUrl = metricsApiEndpointVerified + '?agentType=nodejs&v=' + clientVersion + '&host=' + hostname +
         '&token=' + spmToken
-       // duplicate metrics to a second App
+      // duplicate metrics to a second App
       if (process.env.SPM_MIRROR_TOKEN) {
         self.metricsUrlMirror = metricsApiEndpointVerified + '?agentType=nodejs&v=' + clientVersion + '&host=' + hostname +
-          '&token=' + process.env.SPM_MIRROR_TOKEN
+        '&token=' + process.env.SPM_MIRROR_TOKEN
       }
     }
+    logger.info('SpmSender created for API endpoint: %s', self.metricsUrl)
   })
   this.datapoints = []
   this.datapointsToShip = []
@@ -159,7 +160,6 @@ function SpmSender (spmToken, processMetricsInterval, metricsApiEndpoint) {
     this.sendClientInfo()
   }.bind(this), 10)
   this.startSender()
-  logger.info('SpmSender created for API endpoint: %s', this.metricsUrl)
 }
 util.inherits(SpmSender, events.EventEmitter)
 
@@ -399,8 +399,12 @@ SpmSender.prototype.retransmit = function (metrics, callback) {
     osData = []
   }
   var dp = [appData, osData]
+  var dynamicUrlParameters = ''
+  if (global.spmSenderUrlParameters !== undefined) {
+    dynamicUrlParameters = global.spmSenderUrlParameters
+  }
   var options = [{
-    url: this.metricsUrl + '&sct=APP',
+    url: this.metricsUrl + '&sct=APP' + dynamicUrlParameters,
     headers: {
       'User-Agent': 'node-spm',
       'Content-Type': 'application/json'
@@ -474,8 +478,12 @@ SpmSender.prototype.sendToSpm = function (metricsUrl, callback) {
       return (metric.sct === 'OS')
     })
   ]
+  var dynamicUrlParameters = ''
+  if (global.spmSenderUrlParameters !== undefined) {
+    dynamicUrlParameters = global.spmSenderUrlParameters
+  }
   var options = [{
-    url: metricsUrl + '&sct=APP',
+    url: metricsUrl + '&sct=APP' + dynamicUrlParameters,
     headers: {
       'User-Agent': 'node-spm',
       'Content-Type': 'application/json'