diff --git a/src/Webserver.API/Enums/ApiErrorCode.cs b/src/Webserver.API/Enums/ApiErrorCode.cs
index 4764e60..b429af8 100644
--- a/src/Webserver.API/Enums/ApiErrorCode.cs
+++ b/src/Webserver.API/Enums/ApiErrorCode.cs
@@ -235,8 +235,5 @@ public enum ApiErrorCode
         /// Invalid Parameters provided (null/empty string that is forbidden?, invalid ticket length?, wrong datetime string format (rfc3339)? ...)
         /// </summary>
         InvalidParams = -32602
-
-
-
     }
-}
+}
\ No newline at end of file
diff --git a/src/Webserver.API/Enums/ApiPlcProgramBlockType.cs b/src/Webserver.API/Enums/ApiPlcProgramBlockType.cs
new file mode 100644
index 0000000..5f5d59f
--- /dev/null
+++ b/src/Webserver.API/Enums/ApiPlcProgramBlockType.cs
@@ -0,0 +1,47 @@
+// Copyright (c) 2023, Siemens AG
+//
+// SPDX-License-Identifier: MIT
+
+using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
+using System.Runtime.Serialization;
+
+namespace Siemens.Simatic.S7.Webserver.API.Enums
+{
+    /// <summary>
+    /// Block type enumeration.
+    /// </summary>
+    [JsonConverter(typeof(StringEnumConverter))]
+    public enum ApiPlcProgramBlockType
+    {
+        /// <summary>
+        /// OB block.
+        /// </summary>
+        [EnumMember(Value = "ob")]
+        Ob,
+
+        /// <summary>
+        /// FB block.
+        /// </summary>
+        [EnumMember(Value = "fc")]
+        Fc,
+
+        /// <summary>
+        /// FC block.
+        /// </summary>
+        [EnumMember(Value = "fb")]
+        Fb,
+
+        /// <summary>
+        /// SFB block.
+        /// </summary>
+        [EnumMember(Value = "sfc")]
+        Sfc,
+
+        /// <summary>
+        /// SFC block.
+        /// </summary>
+        [EnumMember(Value = "sfb")]
+        Sfb,
+    }
+}
diff --git a/src/Webserver.API/Models/ApiPlcProgramBrowseCodeBlocksData.cs b/src/Webserver.API/Models/ApiPlcProgramBrowseCodeBlocksData.cs
index caf709a..33d5560 100644
--- a/src/Webserver.API/Models/ApiPlcProgramBrowseCodeBlocksData.cs
+++ b/src/Webserver.API/Models/ApiPlcProgramBrowseCodeBlocksData.cs
@@ -3,6 +3,7 @@
 // SPDX-License-Identifier: MIT
 using Newtonsoft.Json;
 using Newtonsoft.Json.Serialization;
+using Siemens.Simatic.S7.Webserver.API.Enums;
 using System;
 
 namespace Siemens.Simatic.S7.Webserver.API.Models
@@ -18,7 +19,7 @@ public class ApiPlcProgramBrowseCodeBlocksData : IEquatable<ApiPlcProgramBrowseC
         /// <returns></returns>
         public ApiPlcProgramBrowseCodeBlocksData ShallowCopy()
         {
-            return (ApiPlcProgramBrowseCodeBlocksData) this.MemberwiseClone();
+            return (ApiPlcProgramBrowseCodeBlocksData)this.MemberwiseClone();
         }
 
         /// <summary>
@@ -37,13 +38,13 @@ public ApiPlcProgramBrowseCodeBlocksData ShallowCopy()
         /// Type of the code block.
         /// </summary>
         [JsonProperty("block_type")]
-        public string BlockType { get; set; }
+        public ApiPlcProgramBlockType BlockType { get; set; }
 
         /// <summary>
         /// Constructor.
         /// </summary>
         [JsonConstructor]
-        public ApiPlcProgramBrowseCodeBlocksData(string name, ushort blockNumber, string blockType)
+        public ApiPlcProgramBrowseCodeBlocksData(string name, ushort blockNumber, ApiPlcProgramBlockType blockType)
         {
             Name = name;
             BlockNumber = blockNumber;
diff --git a/tests/Webserver.API.UnitTests/ApiRequestTests.cs b/tests/Webserver.API.UnitTests/ApiRequestTests.cs
index df5eb12..441fadc 100644
--- a/tests/Webserver.API.UnitTests/ApiRequestTests.cs
+++ b/tests/Webserver.API.UnitTests/ApiRequestTests.cs
@@ -8,7 +8,6 @@
 using Siemens.Simatic.S7.Webserver.API.Enums;
 using Siemens.Simatic.S7.Webserver.API.Exceptions;
 using Siemens.Simatic.S7.Webserver.API.Models;
-using Siemens.Simatic.S7.Webserver.API.Models.ApiDiagnosticBuffer;
 using Siemens.Simatic.S7.Webserver.API.Models.FailsafeParameters;
 using Siemens.Simatic.S7.Webserver.API.Models.Requests;
 using Siemens.Simatic.S7.Webserver.API.Models.Responses;
@@ -1075,6 +1074,69 @@ public void T013_06_ApiPlcProgramBrowse_InvalidArrayIndex_ExcThrown()
             Assert.ThrowsAsync<ApiInvalidArrayIndexException>(async () => await TestHandler.PlcProgramBrowseAsync(ApiPlcProgramBrowseMode.Children, "\"DataTypes\".\"Bool\"a"));
         }
 
+        /// <summary>
+        /// 
+        /// </summary>
+        /// <returns></returns>
+        [Test]
+        public async Task T014_01_PlcProgramDownloadProfilingData_Success()
+        {
+            var mockHttp = new MockHttpMessageHandler();
+            // Setup a respond for the user api (including a wildcard in the URL)
+            mockHttp.When(HttpMethod.Post, $"https://{Ip.ToString()}/api/jsonrpc")
+                .Respond("application/json", ResponseStrings.PlcProgramDownloadProfilingDataSuccess); // Respond with JSON
+            // Inject the handler or client into your application code
+            var client = new HttpClient(mockHttp);
+            client.BaseAddress = new Uri($"https://{Ip.ToString()}");
+            TestHandler = new ApiHttpClientRequestHandler(client, ApiRequestFactory, ApiResponseChecker);
+
+            ApiSingleStringResponse response = await TestHandler.PlcProgramDownloadProfilingDataAsync();
+
+            Assert.That(response.Result.Equals("jgxikeMgLryvP0YoHc.eqt8BY787"));
+        }
+
+        /// <summary>
+        /// 
+        /// </summary>
+        /// <returns></returns>
+        [Test]
+        public void T014_02_PlcProgramDownloadProfilingData_NoResources()
+        {
+            // This case could happen if the user downloads the profiling
+            // data twice without clearing the ticket or downloading the actual data.
+
+            var mockHttp = new MockHttpMessageHandler();
+            // Setup a respond for the user api (including a wildcard in the URL)
+            mockHttp.When(HttpMethod.Post, $"https://{Ip.ToString()}/api/jsonrpc")
+                .Respond("application/json", ResponseStrings.PlcProgramDownloadProfilingDataNoResources); // Respond with JSON
+            // Inject the handler or client into your application code
+            var client = new HttpClient(mockHttp);
+            client.BaseAddress = new Uri($"https://{Ip.ToString()}");
+            TestHandler = new ApiHttpClientRequestHandler(client, ApiRequestFactory, ApiResponseChecker);
+
+            Assert.ThrowsAsync<ApiNoResourcesException>(async () => await TestHandler.PlcProgramDownloadProfilingDataAsync());
+        }
+
+        /// <summary>
+        /// 
+        /// </summary>
+        /// <returns></returns>
+        [Test]
+        public void T014_03_PlcProgramDownloadProfilingData_PermissionDenied()
+        {
+
+            var mockHttp = new MockHttpMessageHandler();
+            // Setup a respond for the user api (including a wildcard in the URL)
+            mockHttp.When(HttpMethod.Post, $"https://{Ip.ToString()}/api/jsonrpc")
+                .Respond("application/json", ResponseStrings.PlcProgramDownloadProfilingDataPermissionDenied); // Respond with JSON
+            // Inject the handler or client into your application code
+            var client = new HttpClient(mockHttp);
+            client.BaseAddress = new Uri($"https://{Ip.ToString()}");
+            TestHandler = new ApiHttpClientRequestHandler(client, ApiRequestFactory, ApiResponseChecker);
+
+            Assert.ThrowsAsync<System.UnauthorizedAccessException>(async () => await TestHandler.PlcProgramDownloadProfilingDataAsync());
+        }
+
         /// <summary>
         /// 
         /// </summary>
@@ -1093,6 +1155,148 @@ public void T015_ApiPlcProgramBrowse_PermissionDenied_ExcThrown()
             Assert.ThrowsAsync<UnauthorizedAccessException>(async () => await TestHandler.PlcProgramBrowseAsync(ApiPlcProgramBrowseMode.Children, "\"DataTypes\".\"Bool\""));
         }
 
+        /// <summary>
+        /// 
+        /// </summary>
+        /// <returns></returns>
+        [Test]
+        public async Task T015_02_ApiPlcProgramBrowseCodeBlocks_EmptyResult()
+        {
+            var mockHttp = new MockHttpMessageHandler();
+            // Setup a respond for the user api (including a wildcard in the URL)
+            mockHttp.When(HttpMethod.Post, $"https://{Ip.ToString()}/api/jsonrpc")
+                .Respond("application/json", ResponseStrings.PlcProgramBrowseCodeBlocksEmptyResult); // Respond with JSON
+            // Inject the handler or client into your application code
+            var client = new HttpClient(mockHttp);
+            client.BaseAddress = new Uri($"https://{Ip.ToString()}");
+            TestHandler = new ApiHttpClientRequestHandler(client, ApiRequestFactory, ApiResponseChecker);
+
+            ApiPlcProgramBrowseCodeBlocksResponse response = await TestHandler.PlcProgramBrowseCodeBlocksAsync();
+            Assert.That(response.Result.Count == 0);
+        }
+
+        /// <summary>
+        /// 
+        /// </summary>
+        /// <returns></returns>
+        [Test]
+        public void T015_03_ApiPlcProgramBrowseCodeBlocks_InvalidParams()
+        {
+            var mockHttp = new MockHttpMessageHandler();
+            // Setup a respond for the user api (including a wildcard in the URL)
+            mockHttp.When(HttpMethod.Post, $"https://{Ip.ToString()}/api/jsonrpc")
+                .Respond("application/json", ResponseStrings.PlcProgramBrowseCodeBlocksInvalidParams); // Respond with JSON
+            // Inject the handler or client into your application code
+            var client = new HttpClient(mockHttp);
+            client.BaseAddress = new Uri($"https://{Ip.ToString()}");
+            TestHandler = new ApiHttpClientRequestHandler(client, ApiRequestFactory, ApiResponseChecker);
+
+            Assert.ThrowsAsync<ApiInvalidParametersException>(async () => await TestHandler.PlcProgramBrowseCodeBlocksAsync());
+        }
+
+        /// <summary>
+        /// 
+        /// </summary>
+        /// <returns></returns>
+        [Test]
+        public async Task T015_04_ApiPlcProgramBrowseCodeBlocks_Success()
+        {
+            var mockHttp = new MockHttpMessageHandler();
+            // Setup a respond for the user api (including a wildcard in the URL)
+            mockHttp.When(HttpMethod.Post, $"https://{Ip.ToString()}/api/jsonrpc")
+                .Respond("application/json", ResponseStrings.PlcProgramBrowseCodeBlocksSuccess); // Respond with JSON
+            // Inject the handler or client into your application code
+            var client = new HttpClient(mockHttp);
+            client.BaseAddress = new Uri($"https://{Ip.ToString()}");
+            TestHandler = new ApiHttpClientRequestHandler(client, ApiRequestFactory, ApiResponseChecker);
+
+            ApiPlcProgramBrowseCodeBlocksResponse response = await TestHandler.PlcProgramBrowseCodeBlocksAsync();
+
+            Assert.That(response.Result.Count == 5);
+
+            Assert.That(response.Result[0].Name == "Main");
+            Assert.That(response.Result[0].BlockType == ApiPlcProgramBlockType.Ob);
+            Assert.That(response.Result[0].BlockNumber == 1);
+
+            Assert.That(response.Result[1].Name == "USEND");
+            Assert.That(response.Result[1].BlockType == ApiPlcProgramBlockType.Sfb);
+            Assert.That(response.Result[1].BlockNumber == 8);
+
+            Assert.That(response.Result[2].Name == "COPY_HW");
+            Assert.That(response.Result[2].BlockType == ApiPlcProgramBlockType.Sfc);
+            Assert.That(response.Result[2].BlockNumber == 65509);
+
+            Assert.That(response.Result[3].Name == "PRODTEST");
+            Assert.That(response.Result[3].BlockType == ApiPlcProgramBlockType.Fb);
+            Assert.That(response.Result[3].BlockNumber == 65522);
+
+            Assert.That(response.Result[4].Name == "FC_14325");
+            Assert.That(response.Result[4].BlockType == ApiPlcProgramBlockType.Fc);
+            Assert.That(response.Result[4].BlockNumber == 14325);
+        }
+
+        /// <summary>
+        /// 
+        /// </summary>
+        /// <returns></returns>
+        [Test]
+        public async Task T015_05_ApiPlcProgramBrowseCodeBlocks_EmptyBlockName()
+        {
+            var mockHttp = new MockHttpMessageHandler();
+            // Setup a respond for the user api (including a wildcard in the URL)
+            mockHttp.When(HttpMethod.Post, $"https://{Ip.ToString()}/api/jsonrpc")
+                .Respond("application/json", ResponseStrings.PlcProgramBrowseCodeBlocksEmptyBlockName); // Respond with JSON
+            // Inject the handler or client into your application code
+            var client = new HttpClient(mockHttp);
+            client.BaseAddress = new Uri($"https://{Ip.ToString()}");
+            TestHandler = new ApiHttpClientRequestHandler(client, ApiRequestFactory, ApiResponseChecker);
+
+            ApiPlcProgramBrowseCodeBlocksResponse response = await TestHandler.PlcProgramBrowseCodeBlocksAsync();
+
+            Assert.That(response.Result.Count == 1);
+            Assert.That(response.Result[0].Name == String.Empty);
+            Assert.That(response.Result[0].BlockType == ApiPlcProgramBlockType.Ob);
+            Assert.That(response.Result[0].BlockNumber == 1);
+        }
+
+        /// <summary>
+        /// 
+        /// </summary>
+        /// <returns></returns>
+        [Test]
+        public void T015_06_ApiPlcProgramBrowseCodeBlocks_StringAsBlockNumber()
+        {
+            var mockHttp = new MockHttpMessageHandler();
+            // Setup a respond for the user api (including a wildcard in the URL)
+            mockHttp.When(HttpMethod.Post, $"https://{Ip.ToString()}/api/jsonrpc")
+                .Respond("application/json", ResponseStrings.PlcProgramBrowseCodeBlocksStringAsNumber); // Respond with JSON
+            // Inject the handler or client into your application code
+            var client = new HttpClient(mockHttp);
+            client.BaseAddress = new Uri($"https://{Ip.ToString()}");
+            TestHandler = new ApiHttpClientRequestHandler(client, ApiRequestFactory, ApiResponseChecker);
+
+            Assert.ThrowsAsync<Newtonsoft.Json.JsonSerializationException>(async () => await TestHandler.PlcProgramBrowseCodeBlocksAsync());
+        }
+
+        /// <summary>
+        /// 
+        /// </summary>
+        /// <returns></returns>
+        [Test]
+        public void T015_07_ApiPlcProgramBrowseCodeBlocks_PermissionDenied()
+        {
+            var mockHttp = new MockHttpMessageHandler();
+            // Setup a respond for the user api (including a wildcard in the URL)
+            mockHttp.When(HttpMethod.Post, $"https://{Ip.ToString()}/api/jsonrpc")
+                .Respond("application/json", ResponseStrings.PlcProgramBrowseCodeBlocksPermissionDenied); // Respond with JSON
+            // Inject the handler or client into your application code
+            var client = new HttpClient(mockHttp);
+            client.BaseAddress = new Uri($"https://{Ip.ToString()}");
+            TestHandler = new ApiHttpClientRequestHandler(client, ApiRequestFactory, ApiResponseChecker);
+
+            Assert.ThrowsAsync<System.UnauthorizedAccessException>(async () => await TestHandler.PlcProgramBrowseCodeBlocksAsync());
+        }
+
         /// <summary>
         /// 
         /// </summary>
diff --git a/tests/Webserver.API.UnitTests/ResponseStrings.cs b/tests/Webserver.API.UnitTests/ResponseStrings.cs
index 95963a4..e5e423c 100644
--- a/tests/Webserver.API.UnitTests/ResponseStrings.cs
+++ b/tests/Webserver.API.UnitTests/ResponseStrings.cs
@@ -48,10 +48,21 @@ public static class ResponseStrings
         public const string PlcProgramBrowseErrorStruct = "{\"jsonrpc\":\"2.0\",\"id\":\"ibf8wom\",\"result\":[{\"name\":\"ERROR_ID\",\"db_number\":1,\"datatype\":\"word\"},{\"name\":\"FLAGS\",\"db_number\":1,\"datatype\":\"byte\"},{\"name\":\"REACTION\",\"db_number\":1,\"datatype\":\"byte\"},{\"name\":\"CODE_ADDRESS\",\"has_children\":true,\"db_number\":1,\"datatype\":\"cref\"},{\"name\":\"MODE\",\"db_number\":1,\"datatype\":\"byte\"},{\"name\":\"OPERAND_NUMBER\",\"db_number\":1,\"datatype\":\"uint\"},{\"name\":\"POINTER_NUMBER_LOCATION\",\"db_number\":1,\"datatype\":\"uint\"},{\"name\":\"SLOT_NUMBER_SCOPE\",\"db_number\":1,\"datatype\":\"uint\"},{\"name\":\"DATA_ADDRESS\",\"has_children\":true,\"db_number\":1,\"datatype\":\"nref\"}]}";
         public const string PlcProgramBrowseVarIsNotAStructure = "{\"jsonrpc\":\"2.0\",\"id\":\"5q27h2n\",\"error\":{\"code\":202,\"message\":\"Variable is not a structure\"}}";
 
+        public const string PlcProgramBrowseCodeBlocksEmptyResult = "{\"jsonrpc\":\"2.0\",\"id\":\"y9vedkb9\",\"result\":[]}";
+        public const string PlcProgramBrowseCodeBlocksInvalidParams = "{\"jsonrpc\":\"2.0\",\"id\":55,\"error\":{\"code\":-32602,\"message\":\"Invalid Params\"}}";
+        public const string PlcProgramBrowseCodeBlocksSuccess = "{\"jsonrpc\":\"2.0\",\"id\":96,\"result\":[{\"name\":\"Main\",\"block_number\":1,\"block_type\":\"ob\"},{\"name\":\"USEND\",\"block_number\":8,\"block_type\":\"sfb\"},{\"name\":\"COPY_HW\",\"block_number\":65509,\"block_type\":\"sfc\"},{\"name\":\"PRODTEST\",\"block_number\":65522,\"block_type\":\"fb\"},{\"name\":\"FC_14325\",\"block_number\":14325,\"block_type\":\"fc\"}]}";
+        public const string PlcProgramBrowseCodeBlocksEmptyBlockName = "{\"jsonrpc\":\"2.0\",\"id\":96,\"result\":[{\"name\":\"\",\"block_number\":1,\"block_type\":\"ob\"}]}";
+        public const string PlcProgramBrowseCodeBlocksStringAsNumber = "{\"jsonrpc\":\"2.0\",\"id\":96,\"result\":[{\"name\":\"Main\",\"block_number\":\"abcdefg\",\"block_type\":\"ob\"},{\"name\":\"USEND\",\"block_number\":8,\"block_type\":\"sfb\"},{\"name\":\"COPY_HW\",\"block_number\":65509,\"block_type\":\"sfc\"},{\"name\":\"PRODTEST\",\"block_number\":65522,\"block_type\":\"sfc\"}]}";
+        public const string PlcProgramBrowseCodeBlocksPermissionDenied = "{\"jsonrpc\":\"2.0\",\"id\":50,\"error\":{\"code\":2,\"message\":\"Permission denied\"}}";
+
         public const string PlcProgramInvalidAddress = "{\"jsonrpc\":\"2.0\",\"id\":\"5uxrl166\",\"error\":{\"code\":201,\"message\":\"Invalid address\"}}";
         public const string PlcProgramAddressDoesNotExist = "{\"jsonrpc\":\"2.0\",\"id\":\"8buk8ryn\",\"error\":{\"code\":200,\"message\":\"Address does not exist\"}}";
         public const string PlcProgramnInvalidArrayIndex = "{\"jsonrpc\":\"2.0\",\"id\":\"f5eqwla\",\"error\":{\"code\":203,\"message\":\"Invalid array index\"}}";
 
+        public const string PlcProgramDownloadProfilingDataSuccess = "{\"jsonrpc\":\"2.0\",\"id\": 6,\"result\":\"jgxikeMgLryvP0YoHc.eqt8BY787\"}";
+        public const string PlcProgramDownloadProfilingDataPermissionDenied = "{\"jsonrpc\":\"2.0\",\"id\": 18,\"error\":{\"code\": 2,\"message\":\"Permission denied\"}}";
+        public const string PlcProgramDownloadProfilingDataNoResources = "{\"jsonrpc\":\"2.0\",\"id\":28,\"error\":{\"code\":4,\"message\":\"No Resources\"}}";
+
         public const string PlcProgramUnsupportedAddress = "{\"jsonrpc\":\"2.0\",\"id\":\"1wwe2z8j\",\"error\":{\"code\":204,\"message\":\"Unsupported address\"}}";
 
         public const string PlcProgramReadFalseBool = "{\"jsonrpc\":\"2.0\",\"id\":\"aax109lc\",\"result\":false}";