diff --git a/Src/IACore/imp/cpp/HttpClient.cpp b/Src/IACore/imp/cpp/HttpClient.cpp
index 1597969..d304d85 100644
--- a/Src/IACore/imp/cpp/HttpClient.cpp
+++ b/Src/IACore/imp/cpp/HttpClient.cpp
@@ -27,10 +27,9 @@ namespace IACore
 
         for (const auto &h : headers)
         {
-            std::string key = HttpClient::HeaderTypeToString(h.first);
-            out.emplace(key, h.second);
+            out.emplace(h.first, h.second);
 
-            if (h.first == HttpClient::EHeaderType::CONTENT_TYPE)
+            if (h.first == HttpClient::HeaderTypeToString(HttpClient::EHeaderType::CONTENT_TYPE))
                 hasContentType = true;
         }
 
@@ -132,11 +131,6 @@ namespace IACore
 
 namespace IACore
 {
-    HttpClient::Header HttpClient::CreateHeader(IN EHeaderType key, IN CONST String &value)
-    {
-        return std::make_pair(key, value);
-    }
-
     String HttpClient::UrlEncode(IN CONST String &value)
     {
         std::stringstream escaped;
diff --git a/Src/IACore/imp/cpp/XML.cpp b/Src/IACore/imp/cpp/XML.cpp
new file mode 100644
index 0000000..6f16c26
--- /dev/null
+++ b/Src/IACore/imp/cpp/XML.cpp
@@ -0,0 +1,51 @@
+// IACore-OSS; The Core Library for All IA Open Source Projects
+// Copyright (C) 2025 IAS (ias@iasoft.dev)
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <IACore/XML.hpp>
+
+namespace IACore
+{
+    Expected<XML::Document, String> XML::ParseFromString(IN CONST String &data)
+    {
+        Document doc;
+        const auto parseResult = doc.load_string(data.data());
+        if (!parseResult)
+            return MakeUnexpected(std::format("Failed to parse XML: {}", parseResult.description()));
+        return IA_MOVE(doc);
+    }
+
+    Expected<XML::Document, String> XML::ParseFromFile(IN CONST FilePath &path)
+    {
+        Document doc;
+        const auto parseResult = doc.load_file(path.string().c_str());
+        if (!parseResult)
+            return MakeUnexpected(std::format("Failed to parse XML: {}", parseResult.description()));
+        return IA_MOVE(doc);
+    }
+
+    String XML::SerializeToString(IN CONST Node &node)
+    {
+        std::ostringstream oss;
+        node.print(oss);
+        return oss.str();
+    }
+
+    String XML::SerializeToString(IN CONST Document &doc)
+    {
+        std::ostringstream oss;
+        doc.save(oss);
+        return oss.str();
+    }
+} // namespace IACore
\ No newline at end of file
diff --git a/Src/IACore/inc/IACore/HttpClient.hpp b/Src/IACore/inc/IACore/HttpClient.hpp
index 684c3fe..20dfee0 100644
--- a/Src/IACore/inc/IACore/HttpClient.hpp
+++ b/Src/IACore/inc/IACore/HttpClient.hpp
@@ -127,7 +127,7 @@ namespace IACore
             NETWORK_AUTHENTICATION_REQUIRED = 511
         };
 
-        using Header = KeyValuePair<EHeaderType, String>;
+        using Header = KeyValuePair<String, String>;
 
       public:
         HttpClient(IN CONST String &host);
@@ -151,7 +151,9 @@ namespace IACore
         STATIC String UrlDecode(IN CONST String &value);
 
         STATIC String HeaderTypeToString(IN EHeaderType type);
-        STATIC Header CreateHeader(IN EHeaderType key, IN CONST String &value);
+
+        STATIC INLINE Header CreateHeader(IN EHeaderType key, IN CONST String &value);
+        STATIC INLINE Header CreateHeader(IN CONST String &key, IN CONST String &value);
 
         STATIC BOOL IsSuccessResponseCode(IN EResponseCode code);
 
@@ -192,4 +194,14 @@ namespace IACore
             return MakeUnexpected(std::format("Server responded with code {}", (INT32) LastResponseCode()));
         return JSON::ParseToStruct<_response_type>(*rawResponse);
     }
+
+    HttpClient::Header HttpClient::CreateHeader(IN EHeaderType key, IN CONST String &value)
+    {
+        return std::make_pair(HeaderTypeToString(key), value);
+    }
+
+    HttpClient::Header HttpClient::CreateHeader(IN CONST String &key, IN CONST String &value)
+    {
+        return std::make_pair(key, value);
+    }
 } // namespace IACore
\ No newline at end of file
diff --git a/Src/IACore/inc/IACore/XML.hpp b/Src/IACore/inc/IACore/XML.hpp
new file mode 100644
index 0000000..bff6c05
--- /dev/null
+++ b/Src/IACore/inc/IACore/XML.hpp
@@ -0,0 +1,37 @@
+// IACore-OSS; The Core Library for All IA Open Source Projects
+// Copyright (C) 2025 IAS (ias@iasoft.dev)
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+
+#include <IACore/PCH.hpp>
+
+#include <pugixml.hpp>
+
+namespace IACore
+{
+    class XML
+    {
+      public:
+        using Node = pugi::xml_node;
+        using Document = pugi::xml_document;
+
+      public:
+        STATIC Expected<Document, String> ParseFromString(IN CONST String &data);
+        STATIC Expected<Document, String> ParseFromFile(IN CONST FilePath &path);
+
+        STATIC String SerializeToString(IN CONST Node &node);
+        STATIC String SerializeToString(IN CONST Document &doc);
+    };
+} // namespace IACore
\ No newline at end of file