diff --git a/src/Models/Activity.cs b/src/Models/Activity.cs
index 998155c..ec17703 100644
--- a/src/Models/Activity.cs
+++ b/src/Models/Activity.cs
@@ -21,6 +21,7 @@ public class Activity : ActivityBase
         public string Object { get; set; }
         public string Target { get; set; }
         public string Origin { get; set; }
+        public Dictionary<string, object> ScoreVars { get; set; }
 
         public Activity(string actor, string verb, string @object)
         {
diff --git a/src/Models/GetOptions.cs b/src/Models/GetOptions.cs
index e93f16d..b982b50 100644
--- a/src/Models/GetOptions.cs
+++ b/src/Models/GetOptions.cs
@@ -1,4 +1,5 @@
 using Stream.Rest;
+using Stream.Utils;
 using System.Collections.Generic;
 
 namespace Stream.Models
@@ -17,6 +18,8 @@ public class GetOptions
         private string _endpoint = null;
         private string _feed_slug = null;
         private string _user_id = null;
+        private string _ranking_vars = null;
+        private bool _score_vars = false;
 
         private IDictionary<string, string> _custom = null;
 
@@ -56,6 +59,18 @@ public GetOptions WithRanking(string rankingSlug)
             return this;
         }
 
+        public GetOptions WithScoreVars()
+        {
+            _score_vars = true;
+            return this;
+        }
+
+        public GetOptions WithRankingVars(IDictionary<string, object> rankingVars)
+        {
+            _ranking_vars = StreamJsonConverter.SerializeObject(rankingVars);
+            return this;
+        }
+
         public GetOptions WithSession(string session)
         {
             _session = session;
@@ -111,6 +126,12 @@ internal void Apply(RestRequest request)
             if (!string.IsNullOrWhiteSpace(_user_id))
                 request.AddQueryParameter("user_id", _user_id);
 
+            if (!string.IsNullOrWhiteSpace(_ranking_vars))
+                request.AddQueryParameter("ranking_vars", _ranking_vars);
+
+            if (_score_vars)
+                request.AddQueryParameter("withScoreVars", "true");
+
             if (_custom != null)
             {
                 foreach (KeyValuePair<string, string> kvp in _custom)
diff --git a/src/StreamFeed.cs b/src/StreamFeed.cs
index e6d2ecb..e2693f2 100644
--- a/src/StreamFeed.cs
+++ b/src/StreamFeed.cs
@@ -43,7 +43,8 @@ internal StreamFeed(StreamClient client, string feedSlug, string userId)
         public async Task<Activity> AddActivityAsync(Activity activity)
         {
             var request = _client.BuildFeedRequest(this, "/", HttpMethod.Post);
-            request.SetJsonBody(StreamJsonConverter.SerializeObject(activity));
+            var body = StreamJsonConverter.SerializeObject(activity);
+            request.SetJsonBody(body);
 
             var response = await _client.MakeRequestAsync(request);
 
diff --git a/tests/ActivityTests/GetActivityTests.cs b/tests/ActivityTests/GetActivityTests.cs
index 96ce034..1c6b8b8 100644
--- a/tests/ActivityTests/GetActivityTests.cs
+++ b/tests/ActivityTests/GetActivityTests.cs
@@ -99,6 +99,58 @@ public async Task TestGetActivitiesByID()
             });
         }
 
+        [Test]
+        [Ignore("Test database has no ranked method at the moment")]
+        public async Task TestRankingVars()
+        {
+            var newActivity1 = new Activity("1", "test", "1")
+            {
+                ForeignId = "r-test-1",
+                Time = DateTime.Parse("2000-08-16T16:32:32"),
+            };
+
+            newActivity1.SetData("popularity", 123);
+
+            var response = await this.UserFeed.AddActivityAsync(newActivity1);
+
+            var newActivity2 = new Activity("1", "test", "2")
+            {
+                ForeignId = "r-test-2",
+                Time = DateTime.Parse("2000-08-17T16:32:32"),
+            };
+
+            response = await this.UserFeed.AddActivityAsync(newActivity2);
+
+            var ranking_vars = new Dictionary<string, object> { { "popularity", 666 } };
+            var r2 = await this.UserFeed.GetFlatActivitiesAsync(GetOptions.Default.WithLimit(2).WithRanking("popular").WithRankingVars(ranking_vars));
+            Assert.NotNull(r2);
+            Assert.AreEqual(2, r2.Results.Count);
+            Assert.AreEqual(r2.Results[0].Score, 11.090528);
+            Assert.AreEqual(r2.Results[1].Score, 0.99999917);
+        }
+
+        [Test]
+        [Ignore("Test database has no ranked method at the moment")]
+        public async Task TestScoreVars()
+        {
+            var feed = this.RankedFeed;
+
+            var newActivity1 = new Activity("1", "test", "1")
+            {
+                ForeignId = "r-test-1",
+                Time = DateTime.Parse("2000-08-16T16:32:32"),
+            };
+
+            newActivity1.SetData("popularity", 123);
+            var r1 = await feed.AddActivityAsync(newActivity1);
+
+            var r2 = await feed.GetFlatActivitiesAsync(GetOptions.Default.WithLimit(1).WithRanking("popularity").WithScoreVars());
+            Assert.IsNotNull(r2.Results[0].ScoreVars);
+
+            r2 = await feed.GetFlatActivitiesAsync(GetOptions.Default.WithLimit(1).WithRanking("popularity"));
+            Assert.IsNull(r2.Results[0].ScoreVars);
+        }
+
         [Test]
         public async Task TestGetActivitiesByForeignIDAndTime()
         {
diff --git a/tests/TestBase.cs b/tests/TestBase.cs
index d109e90..aca8531 100644
--- a/tests/TestBase.cs
+++ b/tests/TestBase.cs
@@ -8,6 +8,7 @@ public abstract class TestBase
         protected IStreamClient Client { get; private set; }
         protected IStreamFeed UserFeed { get; private set; }
         protected IStreamFeed UserFeed2 { get; private set; }
+        protected IStreamFeed RankedFeed { get; private set; }
         protected IStreamFeed FlatFeed { get; private set; }
         protected IStreamFeed AggregateFeed { get; private set; }
         protected IStreamFeed NotificationFeed { get; private set; }
@@ -21,6 +22,7 @@ public void Setup()
             FlatFeed = Client.Feed("flat", System.Guid.NewGuid().ToString());
             AggregateFeed = Client.Feed("aggregate", System.Guid.NewGuid().ToString());
             NotificationFeed = Client.Feed("notification", System.Guid.NewGuid().ToString());
+            RankedFeed = Client.Feed("ranked", System.Guid.NewGuid().ToString());
         }
     }
 }
\ No newline at end of file