diff --git a/src/Seq.Api/Client/SeqApiClient.cs b/src/Seq.Api/Client/SeqApiClient.cs
index f0b690b..295467b 100644
--- a/src/Seq.Api/Client/SeqApiClient.cs
+++ b/src/Seq.Api/Client/SeqApiClient.cs
@@ -59,7 +59,7 @@ public sealed class SeqApiClient : IDisposable
         /// <param name="serverUrl">The base URL of the Seq server.</param>
         /// <param name="apiKey">An API key to use when making requests to the server, if required.</param>
         /// <param name="useDefaultCredentials">Whether default credentials will be sent with HTTP requests; the default is <c>true</c>.</param>
-        [Obsolete("Prefer `SeqApiClient(serverUrl, apiKey, handler => handler.UseDefaultCredentials = true)` instead."), EditorBrowsable(EditorBrowsableState.Never)]
+        [Obsolete("Prefer `SeqApiClient(serverUrl, apiKey, createHttpMessageHandler)` instead."), EditorBrowsable(EditorBrowsableState.Never)]
         public SeqApiClient(string serverUrl, string apiKey, bool useDefaultCredentials)
             : this(serverUrl, apiKey, handler => handler.UseDefaultCredentials = useDefaultCredentials)
         {
@@ -72,25 +72,45 @@ public SeqApiClient(string serverUrl, string apiKey, bool useDefaultCredentials)
         /// <param name="apiKey">An API key to use when making requests to the server, if required.</param>
         /// <param name="configureHttpClientHandler">An optional callback to configure the <see cref="HttpClientHandler"/> used when making HTTP requests
         /// to the Seq API.</param>
-        public SeqApiClient(string serverUrl, string apiKey = null, Action<HttpClientHandler> configureHttpClientHandler = null)
+        [Obsolete("Prefer `SeqApiClient(serverUrl, apiKey, createHttpMessageHandler)` instead."), EditorBrowsable(EditorBrowsableState.Never)]
+        public SeqApiClient(string serverUrl, string apiKey, Action<HttpClientHandler> configureHttpClientHandler)
+            : this(serverUrl, apiKey, cookies =>
+            {
+                var handler = new HttpClientHandler { CookieContainer = cookies };
+                configureHttpClientHandler?.Invoke(handler);
+                return handler;
+            })
+        {
+        }
+
+        /// <summary>
+        /// Construct a <see cref="SeqApiClient"/>.
+        /// </summary>
+        /// <param name="serverUrl">The base URL of the Seq server.</param>
+        /// <param name="apiKey">An API key to use when making requests to the server, if required.</param>
+        /// <param name="createHttpMessageHandler">An optional callback to construct the HTTP message handler used when making requests
+        /// to the Seq API. The callback receives a <see cref="CookieContainer"/> that is shared with WebSocket requests made by the client.</param>
+        public SeqApiClient(string serverUrl, string apiKey = null, Func<CookieContainer, HttpMessageHandler> createHttpMessageHandler = null)
         {
+            // This is required for compatibility with the obsolete constructor, which we can remove sometime in 2024.
+            var httpMessageHandler = createHttpMessageHandler?.Invoke(_cookies) ??
+#if SOCKETS_HTTP_HANDLER
+                                     new SocketsHttpHandler { CookieContainer = _cookies };
+#else
+                                     new HttpClientHandler { CookieContainer = _cookies };
+#endif
+            
             ServerUrl = serverUrl ?? throw new ArgumentNullException(nameof(serverUrl));
 
             if (!string.IsNullOrEmpty(apiKey))
                 _apiKey = apiKey;
-
-            var handler = new HttpClientHandler
-            {
-                CookieContainer = _cookies
-            };
-
-            configureHttpClientHandler?.Invoke(handler);
-
+            
             var baseAddress = serverUrl;
             if (!baseAddress.EndsWith("/"))
                 baseAddress += "/";
 
-            HttpClient = new HttpClient(handler) { BaseAddress = new Uri(baseAddress) };
+            HttpClient = new HttpClient(httpMessageHandler);
+            HttpClient.BaseAddress = new Uri(baseAddress);
             HttpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue(SeqApiV9MediaType));
 
             if (_apiKey != null)
@@ -251,8 +271,8 @@ public async Task PutAsync<TEntity>(ILinked entity, string link, TEntity content
             var linkUri = ResolveLink(entity, link, parameters);
             var request = new HttpRequestMessage(HttpMethod.Put, linkUri) { Content = MakeJsonContent(content) };
             var stream = await HttpSendAsync(request, cancellationToken).ConfigureAwait(false);
-            using (var reader = new StreamReader(stream))
-                reader.ReadToEnd();
+            using var reader = new StreamReader(stream);
+            await reader.ReadToEndAsync();
         }
 
         /// <summary>
@@ -270,8 +290,8 @@ public async Task DeleteAsync<TEntity>(ILinked entity, string link, TEntity cont
             var linkUri = ResolveLink(entity, link, parameters);
             var request = new HttpRequestMessage(HttpMethod.Delete, linkUri) { Content = MakeJsonContent(content) };
             var stream = await HttpSendAsync(request, cancellationToken).ConfigureAwait(false);
-            using (var reader = new StreamReader(stream))
-                reader.ReadToEnd();
+            using var reader = new StreamReader(stream);
+            await reader.ReadToEndAsync();
         }
 
         /// <summary>
@@ -345,8 +365,8 @@ async Task<string> HttpGetStringAsync(string url, CancellationToken cancellation
         {
             var request = new HttpRequestMessage(HttpMethod.Get, url);
             var stream = await HttpSendAsync(request, cancellationToken).ConfigureAwait(false);
-            using (var reader = new StreamReader(stream))
-                return await reader.ReadToEndAsync();
+            using var reader = new StreamReader(stream);
+            return await reader.ReadToEndAsync().ConfigureAwait(false);
         }
 
         async Task<Stream> HttpSendAsync(HttpRequestMessage request, CancellationToken cancellationToken = default)
diff --git a/src/Seq.Api/Model/Alerting/AlertOccurrencePart.cs b/src/Seq.Api/Model/Alerting/AlertOccurrencePart.cs
index c5fed8b..7adfa5a 100644
--- a/src/Seq.Api/Model/Alerting/AlertOccurrencePart.cs
+++ b/src/Seq.Api/Model/Alerting/AlertOccurrencePart.cs
@@ -19,7 +19,7 @@ public class AlertOccurrencePart
         /// <summary>
         /// The time grouping that triggered the alert.
         /// </summary>
-        public DateTimeRange DetectedOverRange { get; set; }
+        public DateTimeRangePart DetectedOverRange { get; set; }
 
         /// <summary>
         /// The level of notifications sent for this instance.
diff --git a/src/Seq.Api/Model/Alerting/AlertOccurrenceRangePart.cs b/src/Seq.Api/Model/Alerting/AlertOccurrenceRangePart.cs
index bd2df84..7a9116c 100644
--- a/src/Seq.Api/Model/Alerting/AlertOccurrenceRangePart.cs
+++ b/src/Seq.Api/Model/Alerting/AlertOccurrenceRangePart.cs
@@ -11,6 +11,6 @@ public class AlertOccurrenceRangePart
         /// <summary>
         /// The time grouping that triggered the alert.
         /// </summary>
-        public DateTimeRange DetectedOverRange { get; set; }
+        public DateTimeRangePart DetectedOverRange { get; set; }
     }
 }
diff --git a/src/Seq.Api/Model/Cluster/ClusterNodeEntity.cs b/src/Seq.Api/Model/Cluster/ClusterNodeEntity.cs
index f8056e5..db17fa3 100644
--- a/src/Seq.Api/Model/Cluster/ClusterNodeEntity.cs
+++ b/src/Seq.Api/Model/Cluster/ClusterNodeEntity.cs
@@ -43,6 +43,21 @@ public class ClusterNodeEntity : Entity
         /// The time since the node's last completed sync operation.
         /// </summary>
         public double? MillisecondsSinceLastSync { get; set; }
+        
+        /// <summary>
+        /// The time since the follower's active sync was started.
+        /// </summary>
+        public double? MillisecondsSinceActiveSync { get; set; }
+        
+        /// <summary>
+        /// The total number of operations in the active sync.
+        /// </summary>
+        public int? TotalActiveOps { get; set;  }
+
+        /// <summary>
+        /// The remaining number of operations in the active sync.
+        /// </summary>
+        public int? RemainingActiveOps { get; set; }
 
         /// <summary>
         /// An informational description of the node's current state, or <c langword="null">null</c> if no additional
diff --git a/src/Seq.Api/Model/Diagnostics/Storage/StorageConsumptionPart.cs b/src/Seq.Api/Model/Diagnostics/Storage/StorageConsumptionPart.cs
index 3ca6df3..437f9dd 100644
--- a/src/Seq.Api/Model/Diagnostics/Storage/StorageConsumptionPart.cs
+++ b/src/Seq.Api/Model/Diagnostics/Storage/StorageConsumptionPart.cs
@@ -25,12 +25,12 @@ public class StorageConsumptionPart
         /// <summary>
         /// The range of timestamps covered by the result.
         /// </summary>
-        public DateTimeRange Range { get; set; }
+        public DateTimeRangePart Range { get; set; }
         
         /// <summary>
         /// The available range of timestamps.
         /// </summary>
-        public DateTimeRange FullRange { get; set; }
+        public DateTimeRangePart FullRange { get; set; }
 
         /// <summary>
         /// The duration of the timestamp interval covered by each result.
diff --git a/src/Seq.Api/Model/Events/EventEntity.cs b/src/Seq.Api/Model/Events/EventEntity.cs
index fb38bad..fa58cca 100644
--- a/src/Seq.Api/Model/Events/EventEntity.cs
+++ b/src/Seq.Api/Model/Events/EventEntity.cs
@@ -62,5 +62,24 @@ public class EventEntity : Entity
         /// </summary>
         [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
         public string RenderedMessage { get; set; }
+        
+        /// <summary>
+        /// A trace id associated with the event, if any.
+        /// </summary>
+        [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
+        public string TraceId { get; set; }
+
+        /// <summary>
+        /// A span id associated with the event, if any.
+        /// </summary>
+        [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
+        public string SpanId { get; set; }
+
+        /// <summary>
+        /// A collection of properties describing the origin of the event, if any. These correspond to resource
+        /// attributes in the OpenTelemetry spec.
+        /// </summary>
+        [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
+        public List<EventPropertyPart> Resource { get; set; }
     }
 }
diff --git a/src/Seq.Api/Model/Shared/DateTimeRange.cs b/src/Seq.Api/Model/Shared/DateTimeRange.cs
index 8790bdc..ee5a43f 100644
--- a/src/Seq.Api/Model/Shared/DateTimeRange.cs
+++ b/src/Seq.Api/Model/Shared/DateTimeRange.cs
@@ -5,7 +5,7 @@ namespace Seq.Api.Model.Shared
     /// <summary>
     /// A range represented by a start and end <see cref="DateTime"/>.
     /// </summary>
-    public readonly struct DateTimeRange
+    public readonly struct DateTimeRangePart
     {
         /// <summary>
         /// The (inclusive) start of the range.
@@ -18,11 +18,11 @@ public readonly struct DateTimeRange
         public DateTime End { get; }
 
         /// <summary>
-        /// Construct a <see cref="DateTimeRange"/>.
+        /// Construct a <see cref="DateTimeRangePart"/>.
         /// </summary>
         /// <param name="start">The (inclusive) start of the range.</param>
         /// <param name="end">The (exclusive) end of the range.</param>
-        public DateTimeRange(DateTime start, DateTime end)
+        public DateTimeRangePart(DateTime start, DateTime end)
         {
             Start = start;
             End = end;
diff --git a/src/Seq.Api/ResourceGroups/ApiKeysResourceGroup.cs b/src/Seq.Api/ResourceGroups/ApiKeysResourceGroup.cs
index ad98137..c6fbe1d 100644
--- a/src/Seq.Api/ResourceGroups/ApiKeysResourceGroup.cs
+++ b/src/Seq.Api/ResourceGroups/ApiKeysResourceGroup.cs
@@ -121,5 +121,17 @@ public async Task<MeasurementTimeseriesPart> GetMeasurementTimeseriesAsync(ApiKe
             var parameters = new Dictionary<string, object>{ ["id"] = entity.Id, ["measurement"] = measurement };
             return await GroupGetAsync<MeasurementTimeseriesPart>("Metric", parameters, cancellationToken);
         }
+
+        /// <summary>
+        /// Retrieve a detailed metric for all API keys.
+        /// </summary>
+        /// <param name="cancellationToken">A <see cref="CancellationToken"/> allowing the operation to be canceled.</param>
+        /// <param name="measurement">The measurement to get.</param>
+        /// <returns></returns>
+        public async Task<Dictionary<string, MeasurementTimeseriesPart>> GetAllMeasurementTimeseriesAsync(string measurement, CancellationToken cancellationToken = default)
+        {
+            var parameters = new Dictionary<string, object>{ ["measurement"] = measurement };
+            return await GroupGetAsync<Dictionary<string, MeasurementTimeseriesPart>>("Metrics", parameters, cancellationToken);
+        }
     }
 }
diff --git a/src/Seq.Api/Seq.Api.csproj b/src/Seq.Api/Seq.Api.csproj
index a43ff62..27c4c1a 100644
--- a/src/Seq.Api/Seq.Api.csproj
+++ b/src/Seq.Api/Seq.Api.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <Description>Client library for the Seq HTTP API.</Description>
-    <VersionPrefix>2023.3.1</VersionPrefix>
+    <VersionPrefix>2023.1.2</VersionPrefix>
     <Authors>Datalust;Contributors</Authors>
     <TargetFrameworks>netstandard2.0;net6.0</TargetFrameworks>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
@@ -14,6 +14,10 @@
     <LangVersion>9</LangVersion>
   </PropertyGroup>
   
+  <PropertyGroup Condition=" '$(TargetFramework)' == 'net6.0' ">
+    <DefineConstants>$(DefineConstants);SOCKETS_HTTP_HANDLER</DefineConstants>
+  </PropertyGroup>
+  
   <ItemGroup>
     <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
     <PackageReference Include="Tavis.UriTemplates" Version="2.0.0" />
diff --git a/src/Seq.Api/SeqConnection.cs b/src/Seq.Api/SeqConnection.cs
index 63703ce..35df2ce 100644
--- a/src/Seq.Api/SeqConnection.cs
+++ b/src/Seq.Api/SeqConnection.cs
@@ -41,7 +41,7 @@ public class SeqConnection : ILoadResourceGroup, IDisposable
         /// <param name="serverUrl">The base URL of the Seq server.</param>
         /// <param name="apiKey">An API key to use when making requests to the server, if required.</param>
         /// <param name="useDefaultCredentials">Whether default credentials will be sent with HTTP requests; the default is <c>true</c>.</param>
-        [Obsolete("Prefer `SeqConnection(serverUrl, apiKey, handler => handler.UseDefaultCredentials = true)` instead."), EditorBrowsable(EditorBrowsableState.Never)]
+        [Obsolete("Prefer `SeqConnection(serverUrl, apiKey, createHttpMessageHandler)` instead."), EditorBrowsable(EditorBrowsableState.Never)]
         public SeqConnection(string serverUrl, string apiKey, bool useDefaultCredentials)
         {
             if (serverUrl == null) throw new ArgumentNullException(nameof(serverUrl));
@@ -55,11 +55,25 @@ public SeqConnection(string serverUrl, string apiKey, bool useDefaultCredentials
         /// <param name="apiKey">An API key to use when making requests to the server, if required.</param>
         /// <param name="configureHttpClientHandler">An optional callback to configure the <see cref="HttpClientHandler"/> used when making HTTP requests
         /// to the Seq API.</param>
-        public SeqConnection(string serverUrl, string apiKey = null, Action<HttpClientHandler> configureHttpClientHandler = null)
+        [Obsolete("Prefer `SeqConnection(serverUrl, apiKey, createHttpMessageHandler)` instead."), EditorBrowsable(EditorBrowsableState.Never)]
+        public SeqConnection(string serverUrl, string apiKey, Action<HttpClientHandler> configureHttpClientHandler)
         {
             if (serverUrl == null) throw new ArgumentNullException(nameof(serverUrl));
             Client = new SeqApiClient(serverUrl, apiKey, configureHttpClientHandler);
         }
+
+        /// <summary>
+        /// Construct a <see cref="SeqConnection"/>.
+        /// </summary>
+        /// <param name="serverUrl">The base URL of the Seq server.</param>
+        /// <param name="apiKey">An API key to use when making requests to the server, if required.</param>
+        /// <param name="createHttpMessageHandler">An optional callback to construct the HTTP message handler used when making requests
+        /// to the Seq API. The callback receives a <see cref="CookieContainer"/> that is shared with WebSocket requests made by the client.</param>
+        public SeqConnection(string serverUrl, string apiKey = null, Func<CookieContainer, HttpMessageHandler> createHttpMessageHandler = null)
+        {
+            if (serverUrl == null) throw new ArgumentNullException(nameof(serverUrl));
+            Client = new SeqApiClient(serverUrl, apiKey, createHttpMessageHandler);
+        }
         
         /// <summary>
         /// <inheritdoc/>