diff --git a/src/definitions/behaviors/api.js b/src/definitions/behaviors/api.js
index 273b95ef5..3234e574f 100644
--- a/src/definitions/behaviors/api.js
+++ b/src/definitions/behaviors/api.js
@@ -352,7 +352,7 @@ $.api = $.fn.api = function(parameters) {
                   }
                   else {
                     module.verbose('Found required variable', variable, value);
-                    url = url.replace(templatedString, value);
+                    url = url.replace(templatedString, module.get.urlEncodedValue(value));
                   }
                 });
               }
@@ -686,6 +686,19 @@ $.api = $.fn.api = function(parameters) {
               : settings
             ;
           },
+          urlEncodedValue: function(value) {
+            var
+              decodedValue   = window.decodeURIComponent(value),
+              encodedValue   = window.encodeURIComponent(value),
+              alreadyEncoded = (decodedValue !== value)
+            ;
+            if(alreadyEncoded) {
+              module.debug('URL value is already encoded, avoiding double encoding', value);
+              return value;
+            }
+            module.verbose('Encoding value for url', value, encodedValue);
+            return encodedValue;
+          },
           defaultData: function() {
             var
               data = {}