diff --git a/redfish-core/lib/log_services.hpp b/redfish-core/lib/log_services.hpp
index 8a68534..2b06414 100644
--- a/redfish-core/lib/log_services.hpp
+++ b/redfish-core/lib/log_services.hpp
@@ -15,6 +15,7 @@
 */
 #pragma once
 
+#include "http_utility.hpp"
 #include "registries.hpp"
 #include "registries/base_message_registry.hpp"
 #include "registries/openbmc_message_registry.hpp"
@@ -32,6 +33,7 @@
 #include <boost/system/linux_error.hpp>
 #include <error_messages.hpp>
 
+#include <charconv>
 #include <filesystem>
 #include <optional>
 #include <string_view>
@@ -1691,24 +1693,7 @@
                const std::string& param)
 
             {
-                std::string_view acceptHeader = req.getHeaderValue("Accept");
-                // The iterators in boost/http/rfc7230.hpp end the string if '/'
-                // is found, so replace it with arbitrary character '|' which is
-                // not part of the Accept header syntax.
-                std::string acceptStr = boost::replace_all_copy(
-                    std::string(acceptHeader), "/", "|");
-                boost::beast::http::ext_list acceptTypes{acceptStr};
-                bool supported = false;
-                for (const auto& type : acceptTypes)
-                {
-                    if ((type.first == "*|*") ||
-                        (type.first == "application|octet-stream"))
-                    {
-                        supported = true;
-                        break;
-                    }
-                }
-                if (!supported)
+                if (!http_helpers::isOctetAccepted(req))
                 {
                     asyncResp->res.result(
                         boost::beast::http::status::bad_request);
@@ -3032,6 +3017,117 @@
         "xyz.openbmc_project.State.Boot.PostCode", "CurrentBootCycleCount");
 }
 
+inline static bool parsePostCode(std::string postCodeID, uint64_t& currentValue,
+                                 uint16_t& index)
+{
+    // postCodeID = B1-1
+    std::vector<std::string> split;
+    boost::algorithm::split(split, postCodeID, boost::is_any_of("-"));
+    if (split.size() != 2 || split[0].length() < 2)
+    {
+        return false;
+    }
+
+    const char* start = split[0].data() + 1;
+    const char* end = split[0].data() + split[0].size();
+    auto [ptrIndex, ecIndex] = std::from_chars(start, end, index);
+
+    if (ptrIndex != end || ecIndex != std::errc() || !index)
+    {
+        return false;
+    }
+
+    start = split[1].data();
+    end = split[1].data() + split[1].size();
+    auto [ptrValue, ecValue] = std::from_chars(start, end, currentValue);
+    if (ptrValue != end || ecValue != std::errc() || !currentValue)
+    {
+        return false;
+    }
+
+    return true;
+}
+
+inline void requestRoutesPostCodesEntryAdditionalData(App& app)
+{
+    BMCWEB_ROUTE(app, "/redfish/v1/Systems/system/LogServices/PostCodes/"
+                      "Entries/<str>/attachment/")
+        .privileges({"Login"})
+        .methods(boost::beast::http::verb::get)(
+            [](const crow::Request& req,
+               const std::shared_ptr<bmcweb::AsyncResp>& asyncResp,
+               const std::string& postCodeID) {
+                if (!http_helpers::isOctetAccepted(req))
+                {
+                    asyncResp->res.result(
+                        boost::beast::http::status::bad_request);
+                    return;
+                }
+
+                uint64_t currentValue = 0;
+                uint16_t index = 0;
+                if (!parsePostCode(postCodeID, currentValue, index))
+                {
+                    messages::resourceNotFound(asyncResp->res, "LogEntry",
+                                               postCodeID);
+                    return;
+                }
+
+                crow::connections::systemBus->async_method_call(
+                    [asyncResp, postCodeID, currentValue](
+                        const boost::system::error_code ec,
+                        const std::vector<std::tuple<
+                            uint64_t, std::vector<uint8_t>>>& postcodes) {
+                        if (ec.value() == EBADR)
+                        {
+                            messages::resourceNotFound(asyncResp->res,
+                                                       "LogEntry", postCodeID);
+                            return;
+                        }
+                        if (ec)
+                        {
+                            BMCWEB_LOG_DEBUG << "DBUS response error " << ec;
+                            messages::internalError(asyncResp->res);
+                            return;
+                        }
+
+                        if (currentValue < 1 ||
+                            postcodes.size() <= currentValue)
+                        {
+                            BMCWEB_LOG_ERROR << "Wrong currentValue value";
+                            messages::resourceNotFound(asyncResp->res,
+                                                       "LogEntry", postCodeID);
+                            return;
+                        }
+
+                        size_t value = static_cast<size_t>(currentValue) - 1;
+                        auto& [tID, code] = postcodes[value];
+
+                        if (code.size() == 0)
+                        {
+                            BMCWEB_LOG_INFO << "No found post code data";
+                            messages::internalError(asyncResp->res);
+                            return;
+                        }
+
+                        std::string_view strData(
+                            reinterpret_cast<const char*>(code.data()),
+                            code.size());
+
+                        asyncResp->res.addHeader("Content-Type",
+                                                 "application/octet-stream");
+                        asyncResp->res.addHeader("Content-Transfer-Encoding",
+                                                 "Base64");
+                        asyncResp->res.body() =
+                            std::move(crow::utility::base64encode(strData));
+                    },
+                    "xyz.openbmc_project.State.Boot.PostCode0",
+                    "/xyz/openbmc_project/State/Boot/PostCode0",
+                    "xyz.openbmc_project.State.Boot.PostCode", "GetPostCodes",
+                    index);
+            });
+}
+
 inline void requestRoutesPostCodesEntryCollection(App& app)
 {
     BMCWEB_ROUTE(app,