diff --git a/install-tool.ps1 b/install-tool.ps1
new file mode 100644
index 000000000..0e6521110
--- /dev/null
+++ b/install-tool.ps1
@@ -0,0 +1,7 @@
+$latest = Get-ChildItem .\artifacts\ Microsoft.OpenApi.Tool* | select-object -Last 1
+$version = $latest.Name.Split(".")[3..5] | join-string -Separator "."
+
+if (Test-Path -Path ./artifacts/openapi-parser.exe) {
+  dotnet tool uninstall --tool-path artifacts Microsoft.OpenApi.Tool
+}
+dotnet tool install --tool-path artifacts --add-source .\artifacts\ --version $version Microsoft.OpenApi.Tool
\ No newline at end of file
diff --git a/src/Microsoft.OpenApi.Tool/Microsoft.OpenApi.Tool.csproj b/src/Microsoft.OpenApi.Tool/Microsoft.OpenApi.Tool.csproj
index 5845ce4f9..40e46f1a4 100644
--- a/src/Microsoft.OpenApi.Tool/Microsoft.OpenApi.Tool.csproj
+++ b/src/Microsoft.OpenApi.Tool/Microsoft.OpenApi.Tool.csproj
@@ -4,13 +4,13 @@
     <OutputType>Exe</OutputType>
     <TargetFramework>netcoreapp3.1</TargetFramework>
     <PackAsTool>true</PackAsTool>
-    <ToolCommandName>openapi</ToolCommandName>
+    <ToolCommandName>openapi-parser</ToolCommandName>
     <PackageOutputPath>./../../artifacts</PackageOutputPath>
     <Version>1.3.0-preview</Version>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="System.CommandLine" Version="2.0.0-beta1.20574.7" />
+    <PackageReference Include="System.CommandLine" Version="2.0.0-beta1.21216.1" />
   </ItemGroup>
 
   <ItemGroup>
@@ -19,7 +19,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Update="Microsoft.SourceLink.GitHub" Version="1.0.0" />
+    <PackageReference Update="Microsoft.SourceLink.GitHub" Version="1.1.0-beta-20204-02" />
   </ItemGroup>
 
 </Project>
diff --git a/src/Microsoft.OpenApi.Tool/OpenApiService.cs b/src/Microsoft.OpenApi.Tool/OpenApiService.cs
index fd42da1a1..c52c08941 100644
--- a/src/Microsoft.OpenApi.Tool/OpenApiService.cs
+++ b/src/Microsoft.OpenApi.Tool/OpenApiService.cs
@@ -2,10 +2,13 @@
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
+using System.Net;
+using System.Net.Http;
 using System.Text;
 using Microsoft.OpenApi.Extensions;
 using Microsoft.OpenApi.Models;
 using Microsoft.OpenApi.Readers;
+using Microsoft.OpenApi.Services;
 using Microsoft.OpenApi.Validations;
 using Microsoft.OpenApi.Writers;
 
@@ -14,48 +17,57 @@ namespace Microsoft.OpenApi.Tool
     static class OpenApiService
     {
         public static void ProcessOpenApiDocument(
-            FileInfo input,
+            string input,
             FileInfo output,
             OpenApiSpecVersion version,
             OpenApiFormat format,
             bool inline,
             bool resolveExternal)
         {
+            if (input == null)
+            {
+                throw new ArgumentNullException("input");
+            }
+
+            var stream = GetStream(input);
+
             OpenApiDocument document;
-            using (Stream stream = input.OpenRead())
+
+            var result = new OpenApiStreamReader(new OpenApiReaderSettings
+            {
+                ReferenceResolution = resolveExternal == true ? ReferenceResolutionSetting.ResolveAllReferences : ReferenceResolutionSetting.ResolveLocalReferences,
+                RuleSet = ValidationRuleSet.GetDefaultRuleSet()
+            }
+            ).ReadAsync(stream).GetAwaiter().GetResult();
+
+            document = result.OpenApiDocument;
+            var context = result.OpenApiDiagnostic;
+
+            if (context.Errors.Count != 0)
             {
+                var errorReport = new StringBuilder();
 
-                document = new OpenApiStreamReader(new OpenApiReaderSettings
+                foreach (var error in context.Errors)
                 {
-                    ReferenceResolution = resolveExternal == true ? ReferenceResolutionSetting.ResolveAllReferences : ReferenceResolutionSetting.ResolveLocalReferences,
-                    RuleSet = ValidationRuleSet.GetDefaultRuleSet()
+                    errorReport.AppendLine(error.ToString());
                 }
-                ).Read(stream, out var context);
-                if (context.Errors.Count != 0)
-                {
-                    var errorReport = new StringBuilder();
-
-                    foreach (var error in context.Errors)
-                    {
-                        errorReport.AppendLine(error.ToString());
-                    }
 
-                    throw new ArgumentException(String.Join(Environment.NewLine, context.Errors.Select(e => e.Message).ToArray()));
-                }
+                throw new ArgumentException(String.Join(Environment.NewLine, context.Errors.Select(e => e.Message).ToArray()));
             }
 
             using (var outputStream = output?.Create())
             {
                 TextWriter textWriter;
 
-                if (outputStream!=null)
+                if (outputStream != null)
                 {
                     textWriter = new StreamWriter(outputStream);
-                } else
+                }
+                else
                 {
                     textWriter = Console.Out;
                 }
-                
+
                 var settings = new OpenApiWriterSettings()
                 {
                     ReferenceInline = inline == true ? ReferenceInlineSetting.InlineLocalReferences : ReferenceInlineSetting.DoNotInlineReferences
@@ -72,11 +84,67 @@ public static void ProcessOpenApiDocument(
                     default:
                         throw new ArgumentException("Unknown format");
                 }
-                
-                document.Serialize(writer,version );
+
+                document.Serialize(writer, version);
 
                 textWriter.Flush();
             }
         }
-}
+
+        private static Stream GetStream(string input)
+        {
+            Stream stream;
+            if (input.StartsWith("http"))
+            {
+                var httpClient = new HttpClient(new HttpClientHandler()
+                {
+                    SslProtocols = System.Security.Authentication.SslProtocols.Tls12,
+                })
+                {
+                    DefaultRequestVersion = HttpVersion.Version20
+                };
+                stream = httpClient.GetStreamAsync(input).Result;
+            }
+            else
+            {
+                var fileInput = new FileInfo(input);
+                stream = fileInput.OpenRead();
+            }
+
+            return stream;
+        }
+
+        internal static void ValidateOpenApiDocument(string input)
+        {
+            if (input == null)
+            {
+                throw new ArgumentNullException("input");
+            }
+
+            var stream = GetStream(input);
+
+            OpenApiDocument document;
+
+            document = new OpenApiStreamReader(new OpenApiReaderSettings
+            {
+                //ReferenceResolution = resolveExternal == true ? ReferenceResolutionSetting.ResolveAllReferences : ReferenceResolutionSetting.ResolveLocalReferences,
+                RuleSet = ValidationRuleSet.GetDefaultRuleSet()
+            }
+            ).Read(stream, out var context);
+
+            if (context.Errors.Count != 0)
+            {
+                foreach (var error in context.Errors)
+                {
+                    Console.WriteLine(error.ToString());
+                }
+            }
+
+            var statsVisitor = new StatsVisitor();
+            var walker = new OpenApiWalker(statsVisitor);
+            walker.Walk(document);
+
+            Console.WriteLine(statsVisitor.GetStatisticsReport());
+        }
+    }
 }
diff --git a/src/Microsoft.OpenApi.Tool/Program.cs b/src/Microsoft.OpenApi.Tool/Program.cs
index 2c95b954f..446e2829a 100644
--- a/src/Microsoft.OpenApi.Tool/Program.cs
+++ b/src/Microsoft.OpenApi.Tool/Program.cs
@@ -9,23 +9,54 @@ namespace Microsoft.OpenApi.Tool
 {
     class Program
     {
-        static async Task<int> Main(string[] args)
+        static async Task<int> OldMain(string[] args)
         {
+
             var command = new RootCommand
             {
-               new Option("--input") { Argument = new Argument<FileInfo>() },
-                new Option("--output") { Argument = new Argument<FileInfo>() },
-                new Option("--version") { Argument = new Argument<OpenApiSpecVersion>() },
-                new Option("--format") { Argument = new Argument<OpenApiFormat>() },
-                new Option("--inline") { Argument = new Argument<bool>() },
-                new Option("--resolveExternal") { Argument = new Argument<bool>() }
+               new Option("--input", "Input OpenAPI description file path or URL", typeof(string) ),
+                new Option("--output","Output OpenAPI description file", typeof(FileInfo), arity: ArgumentArity.ZeroOrOne),
+                new Option("--version", "OpenAPI specification version", typeof(OpenApiSpecVersion)),
+                new Option("--format", "File format",typeof(OpenApiFormat) ),
+                new Option("--inline", "Inline $ref instances", typeof(bool) ),
+                new Option("--resolveExternal","Resolve external $refs", typeof(bool)) 
             };
 
-            command.Handler = CommandHandler.Create<FileInfo,FileInfo,OpenApiSpecVersion,OpenApiFormat,bool, bool>(
+            command.Handler = CommandHandler.Create<string,FileInfo,OpenApiSpecVersion,OpenApiFormat,bool, bool>(
                 OpenApiService.ProcessOpenApiDocument);
 
             // Parse the incoming args and invoke the handler
             return await command.InvokeAsync(args);
         }
+
+        static async Task<int> Main(string[] args)
+        {
+            var rootCommand = new RootCommand() {
+            };
+
+            var validateCommand = new Command("validate")
+            {
+                new Option("--input", "Input OpenAPI description file path or URL", typeof(string) )
+            };
+            validateCommand.Handler = CommandHandler.Create<string>(OpenApiService.ValidateOpenApiDocument);
+
+            var transformCommand = new Command("transform")
+            {
+                new Option("--input", "Input OpenAPI description file path or URL", typeof(string) ),
+                new Option("--output","Output OpenAPI description file", typeof(FileInfo), arity: ArgumentArity.ZeroOrOne),
+                new Option("--version", "OpenAPI specification version", typeof(OpenApiSpecVersion)),
+                new Option("--format", "File format",typeof(OpenApiFormat) ),
+                new Option("--inline", "Inline $ref instances", typeof(bool) ),
+                new Option("--resolveExternal","Resolve external $refs", typeof(bool))
+            };
+            transformCommand.Handler = CommandHandler.Create<string, FileInfo, OpenApiSpecVersion, OpenApiFormat, bool, bool>(
+                OpenApiService.ProcessOpenApiDocument);
+
+            rootCommand.Add(transformCommand);
+            rootCommand.Add(validateCommand);
+
+            // Parse the incoming args and invoke the handler
+            return await rootCommand.InvokeAsync(args);
+        }
     }
 }
diff --git a/src/Microsoft.OpenApi.Tool/StatsVisitor.cs b/src/Microsoft.OpenApi.Tool/StatsVisitor.cs
new file mode 100644
index 000000000..3c633d860
--- /dev/null
+++ b/src/Microsoft.OpenApi.Tool/StatsVisitor.cs
@@ -0,0 +1,91 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT license. 
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Microsoft.OpenApi.Models;
+using Microsoft.OpenApi.Services;
+
+namespace Microsoft.OpenApi.Tool
+{
+    internal class StatsVisitor : OpenApiVisitorBase
+    {
+        public int ParameterCount { get; set; } = 0;
+
+        public override void Visit(OpenApiParameter parameter)
+        {
+            ParameterCount++;
+        }
+
+        public int SchemaCount { get; set; } = 0;
+
+        public override void Visit(OpenApiSchema schema)
+        {
+            SchemaCount++;
+        }
+
+        public int HeaderCount { get; set; } = 0;
+
+        public override void Visit(IDictionary<string, OpenApiHeader> headers)
+        {
+            HeaderCount++;
+        }
+
+        public int PathItemCount { get; set; } = 0;
+
+        public override void Visit(OpenApiPathItem pathItem)
+        {
+            PathItemCount++;
+        }
+
+        public int RequestBodyCount { get; set; } = 0;
+
+        public override void Visit(OpenApiRequestBody requestBody)
+        {
+            RequestBodyCount++;
+        }
+
+        public int ResponseCount { get; set; } = 0;
+
+        public override void Visit(OpenApiResponses response)
+        {
+            ResponseCount++;
+        }
+
+        public int OperationCount { get; set; } = 0;
+
+        public override void Visit(OpenApiOperation operation)
+        {
+            OperationCount++;
+        }
+
+        public int LinkCount { get; set; } = 0;
+
+        public override void Visit(OpenApiLink operation)
+        {
+            LinkCount++;
+        }
+
+        public int CallbackCount { get; set; } = 0;
+
+        public override void Visit(OpenApiCallback callback)
+        {
+            CallbackCount++;
+        }
+
+        public string GetStatisticsReport()
+        {
+            return $"Path Items: {PathItemCount}" + Environment.NewLine
+                 + $"Operations: {OperationCount}" + Environment.NewLine
+                 + $"Parameters: {ParameterCount}" + Environment.NewLine
+                 + $"Request Bodies: {RequestBodyCount}" + Environment.NewLine
+                 + $"Responses: {ResponseCount}" + Environment.NewLine
+                 + $"Links: {LinkCount}" + Environment.NewLine
+                 + $"Callbacks: {CallbackCount}" + Environment.NewLine
+                 + $"Schemas: {SchemaCount}" + Environment.NewLine;
+        }
+    }
+}