diff --git a/src/Microsoft.Azure.WebJobs.Host/Filters/FunctionExceptionContext.cs b/src/Microsoft.Azure.WebJobs.Host/Filters/FunctionExceptionContext.cs
index 6a8eca8db5..b9474514d2 100644
--- a/src/Microsoft.Azure.WebJobs.Host/Filters/FunctionExceptionContext.cs
+++ b/src/Microsoft.Azure.WebJobs.Host/Filters/FunctionExceptionContext.cs
@@ -11,6 +11,7 @@ namespace Microsoft.Azure.WebJobs.Host
     /// <summary>
     /// Base context class for <see cref="IFunctionExceptionFilter.OnExceptionAsync(FunctionExceptionContext, System.Threading.CancellationToken)"/>.
     /// </summary>
+    [Obsolete("Filters is in preview and there may be breaking changes in this area.")]
     public class FunctionExceptionContext : FunctionFilterContext
     {
         /// <summary>
diff --git a/src/Microsoft.Azure.WebJobs.Host/Filters/FunctionExceptionFilterAttribute.cs b/src/Microsoft.Azure.WebJobs.Host/Filters/FunctionExceptionFilterAttribute.cs
index 8d85aca349..c62343776c 100644
--- a/src/Microsoft.Azure.WebJobs.Host/Filters/FunctionExceptionFilterAttribute.cs
+++ b/src/Microsoft.Azure.WebJobs.Host/Filters/FunctionExceptionFilterAttribute.cs
@@ -10,6 +10,7 @@ namespace Microsoft.Azure.WebJobs.Host
     /// <summary>
     /// Base class for declarative function exception filters.
     /// </summary>
+    [Obsolete("Filters is in preview and there may be breaking changes in this area.")]
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, AllowMultiple = true, Inherited = true)]
     public abstract class FunctionExceptionFilterAttribute : Attribute, IFunctionExceptionFilter
     {
diff --git a/src/Microsoft.Azure.WebJobs.Host/Filters/FunctionExecutedContext.cs b/src/Microsoft.Azure.WebJobs.Host/Filters/FunctionExecutedContext.cs
index 5229bbfacc..88762ad68d 100644
--- a/src/Microsoft.Azure.WebJobs.Host/Filters/FunctionExecutedContext.cs
+++ b/src/Microsoft.Azure.WebJobs.Host/Filters/FunctionExecutedContext.cs
@@ -11,6 +11,7 @@ namespace Microsoft.Azure.WebJobs.Host
     /// <summary>
     /// Context class for <see cref="IFunctionInvocationFilter.OnExecutedAsync(FunctionExecutedContext, System.Threading.CancellationToken)"/>>.
     /// </summary>
+    [Obsolete("Filters is in preview and there may be breaking changes in this area.")]
     public class FunctionExecutedContext : FunctionInvocationContext
     {
         /// <summary>
diff --git a/src/Microsoft.Azure.WebJobs.Host/Filters/FunctionExecutingContext.cs b/src/Microsoft.Azure.WebJobs.Host/Filters/FunctionExecutingContext.cs
index 71cc65f655..ac8a831196 100644
--- a/src/Microsoft.Azure.WebJobs.Host/Filters/FunctionExecutingContext.cs
+++ b/src/Microsoft.Azure.WebJobs.Host/Filters/FunctionExecutingContext.cs
@@ -10,6 +10,7 @@ namespace Microsoft.Azure.WebJobs.Host
     /// <summary>
     /// Context class for <see cref="IFunctionInvocationFilter.OnExecutingAsync(FunctionExecutingContext, System.Threading.CancellationToken)"/>>.
     /// </summary>
+    [Obsolete("Filters is in preview and there may be breaking changes in this area.")]
     public class FunctionExecutingContext : FunctionInvocationContext
     {
         /// <summary>
diff --git a/src/Microsoft.Azure.WebJobs.Host/Filters/FunctionFilterContext.cs b/src/Microsoft.Azure.WebJobs.Host/Filters/FunctionFilterContext.cs
index 292ee4c587..454a201594 100644
--- a/src/Microsoft.Azure.WebJobs.Host/Filters/FunctionFilterContext.cs
+++ b/src/Microsoft.Azure.WebJobs.Host/Filters/FunctionFilterContext.cs
@@ -10,6 +10,7 @@ namespace Microsoft.Azure.WebJobs.Host
     /// <summary>
     /// Base context class for all function filter context objects.
     /// </summary>
+    [Obsolete("Filters is in preview and there may be breaking changes in this area.")]
     public abstract class FunctionFilterContext
     {
         /// <summary>
diff --git a/src/Microsoft.Azure.WebJobs.Host/Filters/FunctionInvocationContext.cs b/src/Microsoft.Azure.WebJobs.Host/Filters/FunctionInvocationContext.cs
index 87af6f7358..bf01eb2df2 100644
--- a/src/Microsoft.Azure.WebJobs.Host/Filters/FunctionInvocationContext.cs
+++ b/src/Microsoft.Azure.WebJobs.Host/Filters/FunctionInvocationContext.cs
@@ -10,6 +10,7 @@ namespace Microsoft.Azure.WebJobs.Host
     /// <summary>
     /// Base context class for <see cref="IFunctionInvocationFilter"/> context objects.
     /// </summary>
+    [Obsolete("Filters is in preview and there may be breaking changes in this area.")]
     public abstract class FunctionInvocationContext : FunctionFilterContext
     {
         /// <summary>
diff --git a/src/Microsoft.Azure.WebJobs.Host/Filters/FunctionInvocationFilterAttribute.cs b/src/Microsoft.Azure.WebJobs.Host/Filters/FunctionInvocationFilterAttribute.cs
index 81554bb4bf..ff77ca7f14 100644
--- a/src/Microsoft.Azure.WebJobs.Host/Filters/FunctionInvocationFilterAttribute.cs
+++ b/src/Microsoft.Azure.WebJobs.Host/Filters/FunctionInvocationFilterAttribute.cs
@@ -10,6 +10,7 @@ namespace Microsoft.Azure.WebJobs.Host
     /// <summary>
     /// Base class for declarative function invocation filters.
     /// </summary>
+    [Obsolete("Filters is in preview and there may be breaking changes in this area.")]
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, AllowMultiple = true, Inherited = true)]
     public abstract class FunctionInvocationFilterAttribute : Attribute, IFunctionInvocationFilter
     {
diff --git a/src/Microsoft.Azure.WebJobs.Host/Filters/IFunctionExceptionFilter.cs b/src/Microsoft.Azure.WebJobs.Host/Filters/IFunctionExceptionFilter.cs
index 5e8e7a763b..f5a7464019 100644
--- a/src/Microsoft.Azure.WebJobs.Host/Filters/IFunctionExceptionFilter.cs
+++ b/src/Microsoft.Azure.WebJobs.Host/Filters/IFunctionExceptionFilter.cs
@@ -1,6 +1,7 @@
 // Copyright (c) .NET Foundation. All rights reserved.
 // Licensed under the MIT License. See License.txt in the project root for license information.
 
+using System;
 using System.Threading;
 using System.Threading.Tasks;
 
@@ -10,6 +11,7 @@ namespace Microsoft.Azure.WebJobs.Host
     /// Defines a filter that will be called as part of the function invocation pipeline
     /// for failed function invocations.
     /// </summary>
+    [Obsolete("Filters is in preview and there may be breaking changes in this area.")]
     public interface IFunctionExceptionFilter : IFunctionFilter
     {
         /// <summary>
diff --git a/src/Microsoft.Azure.WebJobs.Host/Filters/IFunctionInvocationFilter.cs b/src/Microsoft.Azure.WebJobs.Host/Filters/IFunctionInvocationFilter.cs
index 4e167c2e24..273405b557 100644
--- a/src/Microsoft.Azure.WebJobs.Host/Filters/IFunctionInvocationFilter.cs
+++ b/src/Microsoft.Azure.WebJobs.Host/Filters/IFunctionInvocationFilter.cs
@@ -1,6 +1,7 @@
 // Copyright (c) .NET Foundation. All rights reserved.
 // Licensed under the MIT License. See License.txt in the project root for license information.
 
+using System;
 using System.Threading;
 using System.Threading.Tasks;
 
@@ -10,6 +11,7 @@ namespace Microsoft.Azure.WebJobs.Host
     /// Defines a filter that will be called as part of the function invocation pipeline
     /// immediately before and after the job function is invoked.
     /// </summary>
+    [Obsolete("Filters is in preview and there may be breaking changes in this area.")]
     public interface IFunctionInvocationFilter : IFunctionFilter
     {
         /// <summary>
diff --git a/test/Microsoft.Azure.WebJobs.Host.UnitTests/PublicSurfaceTests.cs b/test/Microsoft.Azure.WebJobs.Host.UnitTests/PublicSurfaceTests.cs
index 49b5ab59e8..4d765af0c2 100644
--- a/test/Microsoft.Azure.WebJobs.Host.UnitTests/PublicSurfaceTests.cs
+++ b/test/Microsoft.Azure.WebJobs.Host.UnitTests/PublicSurfaceTests.cs
@@ -133,16 +133,16 @@ public void WebJobs_Host_VerifyPublicSurfaceArea()
                 "FunctionDescriptor",
                 "FunctionException",
                 "FunctionExceptionContext",
-                "FunctionExceptionFilterAttribute",
-                "FunctionExecutedContext",
+                //"FunctionExceptionFilterAttribute",
+                //"FunctionExecutedContext",
                 "FunctionExecutingContext",
-                "FunctionFilterContext",
+                //"FunctionFilterContext",
                 "FunctionIndexingException",
                 "FunctionInstanceFactoryContext",
                 "FunctionInstanceLogEntry",
-                "FunctionInvocationContext",
+                //"FunctionInvocationContext",
                 "FunctionInvocationException",
-                "FunctionInvocationFilterAttribute",
+                //"FunctionInvocationFilterAttribute",
                 "FunctionListenerException",
                 "FunctionMetadata",
                 "FunctionResult",
@@ -168,13 +168,13 @@ public void WebJobs_Host_VerifyPublicSurfaceArea()
                 "IExtensionRegistryExtensions",
                 "IExtensionRegistryFactory",
                 "IFunctionDefinition",
-                "IFunctionExceptionFilter",
+                //"IFunctionExceptionFilter",
                 "IFunctionExecutor",
-                "IFunctionFilter",
+                //"IFunctionFilter",
                 "IFunctionIndexLookup",
                 "IFunctionInstance",
                 "IFunctionInstanceFactory",
-                "IFunctionInvocationFilter",
+                //"IFunctionInvocationFilter",
                 "IFunctionInvoker",
                 "IHostIdProvider",
                 "IHostSingletonManager",