diff --git a/vpd-manager/include/utility/json_utility.hpp b/vpd-manager/include/utility/json_utility.hpp
new file mode 100644
index 0000000..3dab105
--- /dev/null
+++ b/vpd-manager/include/utility/json_utility.hpp
@@ -0,0 +1,1043 @@
+#pragma once
+
+#include "event_logger.hpp"
+#include "exceptions.hpp"
+#include "logger.hpp"
+#include "types.hpp"
+
+#include <gpiod.hpp>
+#include <nlohmann/json.hpp>
+#include <utility/common_utility.hpp>
+
+#include <fstream>
+#include <type_traits>
+#include <unordered_map>
+
+namespace vpd
+{
+namespace jsonUtility
+{
+
+// forward declaration of API for function map.
+bool processSystemCmdTag(const nlohmann::json& i_parsedConfigJson,
+                         const std::string& i_vpdFilePath,
+                         const std::string& i_baseAction,
+                         const std::string& i_flagToProcess);
+
+// forward declaration of API for function map.
+bool processGpioPresenceTag(
+    const nlohmann::json& i_parsedConfigJson, const std::string& i_vpdFilePath,
+    const std::string& i_baseAction, const std::string& i_flagToProcess);
+
+// forward declaration of API for function map.
+bool procesSetGpioTag(const nlohmann::json& i_parsedConfigJson,
+                      const std::string& i_vpdFilePath,
+                      const std::string& i_baseAction,
+                      const std::string& i_flagToProcess);
+
+// Function pointers to process tags from config JSON.
+typedef bool (*functionPtr)(
+    const nlohmann::json& i_parsedConfigJson, const std::string& i_vpdFilePath,
+    const std::string& i_baseAction, const std::string& i_flagToProcess);
+
+inline std::unordered_map<std::string, functionPtr> funcionMap{
+    {"gpioPresence", processGpioPresenceTag},
+    {"setGpio", procesSetGpioTag},
+    {"systemCmd", processSystemCmdTag}};
+
+/**
+ * @brief API to read VPD offset from JSON file.
+ *
+ * @param[in] i_sysCfgJsonObj - Parsed system config JSON object.
+ * @param[in] i_vpdFilePath - VPD file path.
+ * @return VPD offset if found in JSON, 0 otherwise.
+ */
+inline size_t getVPDOffset(const nlohmann::json& i_sysCfgJsonObj,
+                           const std::string& i_vpdFilePath)
+{
+    if (i_vpdFilePath.empty() || (i_sysCfgJsonObj.empty()) ||
+        (!i_sysCfgJsonObj.contains("frus")))
+    {
+        return 0;
+    }
+
+    if (i_sysCfgJsonObj["frus"].contains(i_vpdFilePath))
+    {
+        return i_sysCfgJsonObj["frus"][i_vpdFilePath].at(0).value("offset", 0);
+    }
+
+    const nlohmann::json& l_fruList =
+        i_sysCfgJsonObj["frus"].get_ref<const nlohmann::json::object_t&>();
+
+    for (const auto& l_fru : l_fruList.items())
+    {
+        const auto l_fruPath = l_fru.key();
+
+        // check if given path is redundant FRU path
+        if (i_vpdFilePath == i_sysCfgJsonObj["frus"][l_fruPath].at(0).value(
+                                 "redundantEeprom", ""))
+        {
+            // Return the offset of redundant EEPROM taken from JSON.
+            return i_sysCfgJsonObj["frus"][l_fruPath].at(0).value("offset", 0);
+        }
+    }
+
+    return 0;
+}
+
+/**
+ * @brief API to parse respective JSON.
+ *
+ * Exception is thrown in case of JSON parse error.
+ *
+ * @param[in] pathToJson - Path to JSON.
+ * @return Parsed JSON.
+ */
+inline nlohmann::json getParsedJson(const std::string& pathToJson)
+{
+    if (pathToJson.empty())
+    {
+        throw std::runtime_error("Path to JSON is missing");
+    }
+
+    if (!std::filesystem::exists(pathToJson) ||
+        std::filesystem::is_empty(pathToJson))
+    {
+        throw std::runtime_error("Incorrect File Path or empty file");
+    }
+
+    std::ifstream jsonFile(pathToJson);
+    if (!jsonFile)
+    {
+        throw std::runtime_error("Failed to access Json path = " + pathToJson);
+    }
+
+    try
+    {
+        return nlohmann::json::parse(jsonFile);
+    }
+    catch (const nlohmann::json::parse_error& e)
+    {
+        throw std::runtime_error("Failed to parse JSON file");
+    }
+}
+
+/**
+ * @brief Get inventory object path from system config JSON.
+ *
+ * Given either D-bus inventory path/FRU EEPROM path/redundant EEPROM path,
+ * this API returns D-bus inventory path if present in JSON.
+ *
+ * @param[in] i_sysCfgJsonObj - System config JSON object
+ * @param[in] i_vpdPath - Path to where VPD is stored.
+ *
+ * @throw std::runtime_error.
+ *
+ * @return On success a valid path is returned, on failure an empty string is
+ * returned or an exception is thrown.
+ */
+inline std::string getInventoryObjPathFromJson(
+    const nlohmann::json& i_sysCfgJsonObj, const std::string& i_vpdPath)
+{
+    if (i_vpdPath.empty())
+    {
+        throw std::runtime_error("Path parameter is empty.");
+    }
+
+    if (!i_sysCfgJsonObj.contains("frus"))
+    {
+        throw std::runtime_error("Missing frus tag in system config JSON.");
+    }
+
+    // check if given path is FRU path
+    if (i_sysCfgJsonObj["frus"].contains(i_vpdPath))
+    {
+        return i_sysCfgJsonObj["frus"][i_vpdPath].at(0).value(
+            "inventoryPath", "");
+    }
+
+    const nlohmann::json& l_fruList =
+        i_sysCfgJsonObj["frus"].get_ref<const nlohmann::json::object_t&>();
+
+    for (const auto& l_fru : l_fruList.items())
+    {
+        const auto l_fruPath = l_fru.key();
+        const auto l_invObjPath =
+            i_sysCfgJsonObj["frus"][l_fruPath].at(0).value("inventoryPath", "");
+
+        // check if given path is redundant FRU path or inventory path
+        if (i_vpdPath == i_sysCfgJsonObj["frus"][l_fruPath].at(0).value(
+                             "redundantEeprom", "") ||
+            (i_vpdPath == l_invObjPath))
+        {
+            return l_invObjPath;
+        }
+    }
+    return std::string();
+}
+
+/**
+ * @brief Process "PostFailAction" defined in config JSON.
+ *
+ * In case there is some error in the processing of "preAction" execution and a
+ * set of procedure needs to be done as a part of post fail action. This base
+ * action can be defined in the config JSON for that FRU and it will be handled
+ * under this API.
+ *
+ * @param[in] i_parsedConfigJson - config JSON
+ * @param[in] i_vpdFilePath - EEPROM file path
+ * @param[in] i_flagToProcess - To identify which flag(s) needs to be processed
+ * under PostFailAction tag of config JSON.
+ * @return - success or failure
+ */
+inline bool executePostFailAction(const nlohmann::json& i_parsedConfigJson,
+                                  const std::string& i_vpdFilePath,
+                                  const std::string& i_flagToProcess)
+{
+    if (i_parsedConfigJson.empty() || i_vpdFilePath.empty() ||
+        i_flagToProcess.empty())
+    {
+        logging::logMessage(
+            "Invalid parameters. Abort processing for post fail action");
+
+        return false;
+    }
+
+    if (!(i_parsedConfigJson["frus"][i_vpdFilePath].at(0))["PostFailAction"]
+             .contains(i_flagToProcess))
+    {
+        logging::logMessage(
+            "Config JSON missing flag " + i_flagToProcess +
+            " to execute post fail action for path = " + i_vpdFilePath);
+
+        return false;
+    }
+
+    for (const auto& l_tags : (i_parsedConfigJson["frus"][i_vpdFilePath].at(
+             0))["PostFailAction"][i_flagToProcess]
+                                  .items())
+    {
+        auto itrToFunction = funcionMap.find(l_tags.key());
+        if (itrToFunction != funcionMap.end())
+        {
+            if (!itrToFunction->second(i_parsedConfigJson, i_vpdFilePath,
+                                       "PostFailAction", i_flagToProcess))
+            {
+                return false;
+            }
+        }
+    }
+
+    return true;
+}
+
+/**
+ * @brief Process "systemCmd" tag for a given FRU.
+ *
+ * The API will process "systemCmd" tag if it is defined in the config
+ * JSON for the given FRU.
+ *
+ * @param[in] i_parsedConfigJson - config JSON
+ * @param[in] i_vpdFilePath - EEPROM file path
+ * @param[in] i_baseAction - Base action for which this tag has been called.
+ * @param[in] i_flagToProcess - Flag nested under the base action for which this
+ * tag has been called.
+ * @return Execution status.
+ */
+inline bool processSystemCmdTag(
+    const nlohmann::json& i_parsedConfigJson, const std::string& i_vpdFilePath,
+    const std::string& i_baseAction, const std::string& i_flagToProcess)
+{
+    if (i_vpdFilePath.empty() || i_parsedConfigJson.empty() ||
+        i_baseAction.empty() || i_flagToProcess.empty())
+    {
+        logging::logMessage(
+            "Invalid parameter. Abort processing of processSystemCmd.");
+        return false;
+    }
+
+    if (!((i_parsedConfigJson["frus"][i_vpdFilePath].at(
+               0)[i_baseAction][i_flagToProcess]["systemCmd"])
+              .contains("cmd")))
+    {
+        logging::logMessage(
+            "Config JSON missing required information to execute system command for EEPROM " +
+            i_vpdFilePath);
+
+        return false;
+    }
+
+    try
+    {
+        const std::string& l_systemCommand =
+            i_parsedConfigJson["frus"][i_vpdFilePath].at(
+                0)[i_baseAction][i_flagToProcess]["systemCmd"]["cmd"];
+
+        commonUtility::executeCmd(l_systemCommand);
+        return true;
+    }
+    catch (const std::exception& e)
+    {
+        std::string l_errMsg = "Process system tag failed for exception: ";
+        l_errMsg += e.what();
+
+        logging::logMessage(l_errMsg);
+        return false;
+    }
+}
+
+/**
+ * @brief Checks for presence of a given FRU using GPIO line.
+ *
+ * This API returns the presence information of the FRU corresponding to the
+ * given VPD file path by setting the presence pin.
+ *
+ * @param[in] i_parsedConfigJson - config JSON
+ * @param[in] i_vpdFilePath - EEPROM file path
+ * @param[in] i_baseAction - Base action for which this tag has been called.
+ * @param[in] i_flagToProcess - Flag nested under the base action for which this
+ * tag has been called.
+ * @return Execution status.
+ */
+inline bool processGpioPresenceTag(
+    const nlohmann::json& i_parsedConfigJson, const std::string& i_vpdFilePath,
+    const std::string& i_baseAction, const std::string& i_flagToProcess)
+{
+    if (i_vpdFilePath.empty() || i_parsedConfigJson.empty() ||
+        i_baseAction.empty() || i_flagToProcess.empty())
+    {
+        logging::logMessage(
+            "Invalid parameter. Abort processing of processGpioPresence tag");
+        return false;
+    }
+
+    if (!(((i_parsedConfigJson["frus"][i_vpdFilePath].at(
+                0)[i_baseAction][i_flagToProcess]["gpioPresence"])
+               .contains("pin")) &&
+          ((i_parsedConfigJson["frus"][i_vpdFilePath].at(
+                0)[i_baseAction][i_flagToProcess]["gpioPresence"])
+               .contains("value"))))
+    {
+        logging::logMessage(
+            "Config JSON missing required information to detect presence for EEPROM " +
+            i_vpdFilePath);
+
+        return false;
+    }
+
+    // get the pin name
+    const std::string& l_presencePinName =
+        i_parsedConfigJson["frus"][i_vpdFilePath].at(
+            0)[i_baseAction][i_flagToProcess]["gpioPresence"]["pin"];
+
+    // get the pin value
+    uint8_t l_presencePinValue = i_parsedConfigJson["frus"][i_vpdFilePath].at(
+        0)[i_baseAction][i_flagToProcess]["gpioPresence"]["value"];
+
+    try
+    {
+        gpiod::line l_presenceLine = gpiod::find_line(l_presencePinName);
+
+        if (!l_presenceLine)
+        {
+            throw GpioException("Couldn't find the GPIO line.");
+        }
+
+        l_presenceLine.request({"Read the presence line",
+                                gpiod::line_request::DIRECTION_INPUT, 0});
+
+        return (l_presencePinValue == l_presenceLine.get_value());
+    }
+    catch (const std::exception& ex)
+    {
+        std::string l_errMsg = "Exception on GPIO line: ";
+        l_errMsg += l_presencePinName;
+        l_errMsg += " Reason: ";
+        l_errMsg += ex.what();
+        l_errMsg += " File: " + i_vpdFilePath + " Pel Logged";
+
+        // ToDo -- Update Internal Rc code.
+        EventLogger::createAsyncPelWithInventoryCallout(
+            types::ErrorType::GpioError, types::SeverityType::Informational,
+            {{getInventoryObjPathFromJson(i_parsedConfigJson, i_vpdFilePath),
+              types::CalloutPriority::High}},
+            std::source_location::current().file_name(),
+            std::source_location::current().function_name(), 0, l_errMsg,
+            std::nullopt, std::nullopt, std::nullopt, std::nullopt);
+
+        logging::logMessage(l_errMsg);
+
+        // Except when GPIO pin value is false, we go and try collecting the
+        // FRU VPD as we couldn't able to read GPIO pin value due to some
+        // error/exception. So returning true in error scenario.
+        return true;
+    }
+}
+
+/**
+ * @brief Process "setGpio" tag for a given FRU.
+ *
+ * This API enables the GPIO line.
+ *
+ * @param[in] i_parsedConfigJson - config JSON
+ * @param[in] i_vpdFilePath - EEPROM file path
+ * @param[in] i_baseAction - Base action for which this tag has been called.
+ * @param[in] i_flagToProcess - Flag nested under the base action for which this
+ * tag has been called.
+ * @return Execution status.
+ */
+inline bool procesSetGpioTag(
+    const nlohmann::json& i_parsedConfigJson, const std::string& i_vpdFilePath,
+    const std::string& i_baseAction, const std::string& i_flagToProcess)
+{
+    if (i_vpdFilePath.empty() || i_parsedConfigJson.empty() ||
+        i_baseAction.empty() || i_flagToProcess.empty())
+    {
+        logging::logMessage(
+            "Invalid parameter. Abort processing of procesSetGpio.");
+        return false;
+    }
+
+    if (!(((i_parsedConfigJson["frus"][i_vpdFilePath].at(
+                0)[i_baseAction][i_flagToProcess]["setGpio"])
+               .contains("pin")) &&
+          ((i_parsedConfigJson["frus"][i_vpdFilePath].at(
+                0)[i_baseAction][i_flagToProcess]["setGpio"])
+               .contains("value"))))
+    {
+        logging::logMessage(
+            "Config JSON missing required information to set gpio line for EEPROM " +
+            i_vpdFilePath);
+
+        return false;
+    }
+
+    const std::string& l_pinName = i_parsedConfigJson["frus"][i_vpdFilePath].at(
+        0)[i_baseAction][i_flagToProcess]["setGpio"]["pin"];
+
+    // Get the value to set
+    uint8_t l_pinValue = i_parsedConfigJson["frus"][i_vpdFilePath].at(
+        0)[i_baseAction][i_flagToProcess]["setGpio"]["value"];
+
+    logging::logMessage(
+        "Setting GPIO: " + l_pinName + " to " + std::to_string(l_pinValue));
+    try
+    {
+        gpiod::line l_outputLine = gpiod::find_line(l_pinName);
+
+        if (!l_outputLine)
+        {
+            throw GpioException("Couldn't find GPIO line.");
+        }
+
+        l_outputLine.request(
+            {"FRU Action", ::gpiod::line_request::DIRECTION_OUTPUT, 0},
+            l_pinValue);
+        return true;
+    }
+    catch (const std::exception& ex)
+    {
+        std::string l_errMsg = "Exception on GPIO line: ";
+        l_errMsg += l_pinName;
+        l_errMsg += " Reason: ";
+        l_errMsg += ex.what();
+        l_errMsg += " File: " + i_vpdFilePath + " Pel Logged";
+
+        // ToDo -- Update Internal RC code
+        EventLogger::createAsyncPelWithInventoryCallout(
+            types::ErrorType::GpioError, types::SeverityType::Informational,
+            {{getInventoryObjPathFromJson(i_parsedConfigJson, i_vpdFilePath),
+              types::CalloutPriority::High}},
+            std::source_location::current().file_name(),
+            std::source_location::current().function_name(), 0, l_errMsg,
+            std::nullopt, std::nullopt, std::nullopt, std::nullopt);
+
+        logging::logMessage(l_errMsg);
+
+        return false;
+    }
+}
+
+/**
+ * @brief Process any action, if defined in config JSON.
+ *
+ * If any FRU(s) requires any special handling, then this base action can be
+ * defined for that FRU in the config JSON, processing of which will be handled
+ * in this API.
+ * Examples of action - preAction, PostAction etc.
+ *
+ * @param[in] i_parsedConfigJson - config JSON
+ * @param[in] i_action - Base action to be performed.
+ * @param[in] i_vpdFilePath - EEPROM file path
+ * @param[in] i_flagToProcess - To identify which flag(s) needs to be processed
+ * under PreAction tag of config JSON.
+ * @return - success or failure
+ */
+inline bool executeBaseAction(
+    const nlohmann::json& i_parsedConfigJson, const std::string& i_action,
+    const std::string& i_vpdFilePath, const std::string& i_flagToProcess)
+{
+    if (i_flagToProcess.empty() || i_action.empty() || i_vpdFilePath.empty() ||
+        !i_parsedConfigJson.contains("frus"))
+    {
+        logging::logMessage("Invalid parameter");
+        return false;
+    }
+
+    if (!i_parsedConfigJson["frus"].contains(i_vpdFilePath))
+    {
+        logging::logMessage(
+            "File path: " + i_vpdFilePath + " not found in JSON");
+        return false;
+    }
+
+    if (!i_parsedConfigJson["frus"][i_vpdFilePath].at(0).contains(i_action))
+    {
+        logging::logMessage("Action [" + i_action +
+                            "] not defined for file path:" + i_vpdFilePath);
+        return false;
+    }
+
+    if (!(i_parsedConfigJson["frus"][i_vpdFilePath].at(0))[i_action].contains(
+            i_flagToProcess))
+    {
+        logging::logMessage("Config JSON missing flag [" + i_flagToProcess +
+                            "] to execute action for path = " + i_vpdFilePath);
+
+        return false;
+    }
+
+    const nlohmann::json& l_tagsJson =
+        (i_parsedConfigJson["frus"][i_vpdFilePath].at(
+            0))[i_action][i_flagToProcess];
+
+    for (const auto& l_tag : l_tagsJson.items())
+    {
+        auto itrToFunction = funcionMap.find(l_tag.key());
+        if (itrToFunction != funcionMap.end())
+        {
+            if (!itrToFunction->second(i_parsedConfigJson, i_vpdFilePath,
+                                       i_action, i_flagToProcess))
+            {
+                // In case any of the tag fails to execute. Mark action
+                // as failed for that flag.
+                return false;
+            }
+        }
+    }
+
+    return true;
+}
+
+/**
+ * @brief Get redundant FRU path from system config JSON
+ *
+ * Given either D-bus inventory path/FRU path/redundant FRU path, this
+ * API returns the redundant FRU path taken from "redundantEeprom" tag from
+ * system config JSON.
+ *
+ * @param[in] i_sysCfgJsonObj - System config JSON object.
+ * @param[in] i_vpdPath - Path to where VPD is stored.
+ *
+ * @throw std::runtime_error.
+ * @return On success return valid path, on failure return empty string.
+ */
+inline std::string getRedundantEepromPathFromJson(
+    const nlohmann::json& i_sysCfgJsonObj, const std::string& i_vpdPath)
+{
+    if (i_vpdPath.empty())
+    {
+        throw std::runtime_error("Path parameter is empty.");
+    }
+
+    if (!i_sysCfgJsonObj.contains("frus"))
+    {
+        throw std::runtime_error("Missing frus tag in system config JSON.");
+    }
+
+    // check if given path is FRU path
+    if (i_sysCfgJsonObj["frus"].contains(i_vpdPath))
+    {
+        return i_sysCfgJsonObj["frus"][i_vpdPath].at(0).value(
+            "redundantEeprom", "");
+    }
+
+    const nlohmann::json& l_fruList =
+        i_sysCfgJsonObj["frus"].get_ref<const nlohmann::json::object_t&>();
+
+    for (const auto& l_fru : l_fruList.items())
+    {
+        const std::string& l_fruPath = l_fru.key();
+        const std::string& l_redundantFruPath =
+            i_sysCfgJsonObj["frus"][l_fruPath].at(0).value("redundantEeprom",
+                                                           "");
+
+        // check if given path is inventory path or redundant FRU path
+        if ((i_sysCfgJsonObj["frus"][l_fruPath].at(0).value("inventoryPath",
+                                                            "") == i_vpdPath) ||
+            (l_redundantFruPath == i_vpdPath))
+        {
+            return l_redundantFruPath;
+        }
+    }
+    return std::string();
+}
+
+/**
+ * @brief Get FRU EEPROM path from system config JSON
+ *
+ * Given either D-bus inventory path/FRU EEPROM path/redundant EEPROM path,
+ * this API returns FRU EEPROM path if present in JSON.
+ *
+ * @param[in] i_sysCfgJsonObj - System config JSON object
+ * @param[in] i_vpdPath - Path to where VPD is stored.
+ *
+ * @throw std::runtime_error.
+ *
+ * @return On success return valid path, on failure return empty string.
+ */
+inline std::string getFruPathFromJson(const nlohmann::json& i_sysCfgJsonObj,
+                                      const std::string& i_vpdPath)
+{
+    if (i_vpdPath.empty())
+    {
+        throw std::runtime_error("Path parameter is empty.");
+    }
+
+    if (!i_sysCfgJsonObj.contains("frus"))
+    {
+        throw std::runtime_error("Missing frus tag in system config JSON.");
+    }
+
+    // check if given path is FRU path
+    if (i_sysCfgJsonObj["frus"].contains(i_vpdPath))
+    {
+        return i_vpdPath;
+    }
+
+    const nlohmann::json& l_fruList =
+        i_sysCfgJsonObj["frus"].get_ref<const nlohmann::json::object_t&>();
+
+    for (const auto& l_fru : l_fruList.items())
+    {
+        const auto l_fruPath = l_fru.key();
+
+        // check if given path is redundant FRU path or inventory path
+        if (i_vpdPath == i_sysCfgJsonObj["frus"][l_fruPath].at(0).value(
+                             "redundantEeprom", "") ||
+            (i_vpdPath == i_sysCfgJsonObj["frus"][l_fruPath].at(0).value(
+                              "inventoryPath", "")))
+        {
+            return l_fruPath;
+        }
+    }
+    return std::string();
+}
+
+/**
+ * @brief An API to check backup and restore VPD is required.
+ *
+ * The API checks if there is provision for backup and restore mentioned in the
+ * system config JSON, by looking "backupRestoreConfigPath" tag.
+ * Checks if the path mentioned is a hardware path, by checking if the file path
+ * exists and size of contents in the path.
+ *
+ * @param[in] i_sysCfgJsonObj - System config JSON object.
+ *
+ * @return true if backup and restore is required, false otherwise.
+ */
+inline bool isBackupAndRestoreRequired(const nlohmann::json& i_sysCfgJsonObj)
+{
+    try
+    {
+        const std::string& l_backupAndRestoreCfgFilePath =
+            i_sysCfgJsonObj.value("backupRestoreConfigPath", "");
+        if (!l_backupAndRestoreCfgFilePath.empty() &&
+            std::filesystem::exists(l_backupAndRestoreCfgFilePath) &&
+            !std::filesystem::is_empty(l_backupAndRestoreCfgFilePath))
+        {
+            return true;
+        }
+    }
+    catch (std::exception& ex)
+    {
+        logging::logMessage(ex.what());
+    }
+    return false;
+}
+
+/** @brief API to check if an action is required for given EEPROM path.
+ *
+ * System config JSON can contain pre-action, post-action etc. like actions
+ * defined for an EEPROM path. The API will check if any such action is defined
+ * for the EEPROM.
+ *
+ * @param[in] i_sysCfgJsonObj - System config JSON object.
+ * @param[in] i_vpdFruPath - EEPROM path.
+ * @param[in] i_action - Action to be checked.
+ * @param[in] i_flowFlag - Denotes the flow w.r.t which the action should be
+ * triggered.
+ * @return - True if action is defined for the flow, false otherwise.
+ */
+inline bool isActionRequired(
+    const nlohmann::json& i_sysCfgJsonObj, const std::string& i_vpdFruPath,
+    const std::string& i_action, const std::string& i_flowFlag)
+{
+    if (i_vpdFruPath.empty() || i_action.empty() || i_flowFlag.empty())
+    {
+        logging::logMessage("Invalid parameters recieved.");
+        return false;
+    }
+
+    if (!i_sysCfgJsonObj.contains("frus"))
+    {
+        logging::logMessage("Invalid JSON object recieved.");
+        return false;
+    }
+
+    if (!i_sysCfgJsonObj["frus"].contains(i_vpdFruPath))
+    {
+        logging::logMessage(
+            "JSON object does not contain EEPROM path " + i_vpdFruPath);
+        return false;
+    }
+
+    if ((i_sysCfgJsonObj["frus"][i_vpdFruPath].at(0)).contains(i_action))
+    {
+        if ((i_sysCfgJsonObj["frus"][i_vpdFruPath].at(0))[i_action].contains(
+                i_flowFlag))
+        {
+            return true;
+        }
+
+        logging::logMessage("Flow flag: [" + i_flowFlag +
+                            "], not found in JSON for path: " + i_vpdFruPath);
+        return false;
+    }
+    return false;
+}
+
+/**
+ * @brief An API to return list of FRUs that needs GPIO polling.
+ *
+ * An API that checks for the FRUs that requires GPIO polling and returns
+ * a list of FRUs that needs polling. Returns an empty list if there are
+ * no FRUs that requires polling.
+ *
+ * @throw std::runtime_error
+ *
+ * @param[in] i_sysCfgJsonObj - System config JSON object.
+ *
+ * @return list of FRUs parameters that needs polling.
+ */
+inline std::vector<std::string>
+    getListOfGpioPollingFrus(const nlohmann::json& i_sysCfgJsonObj)
+{
+    if (i_sysCfgJsonObj.empty())
+    {
+        throw std::runtime_error("Invalid Parameters");
+    }
+
+    if (!i_sysCfgJsonObj.contains("frus"))
+    {
+        throw std::runtime_error("Missing frus section in system config JSON");
+    }
+
+    std::vector<std::string> l_gpioPollingRequiredFrusList;
+
+    for (const auto& l_fru : i_sysCfgJsonObj["frus"].items())
+    {
+        const auto l_fruPath = l_fru.key();
+
+        try
+        {
+            if (isActionRequired(i_sysCfgJsonObj, l_fruPath, "pollingRequired",
+                                 "hotPlugging"))
+            {
+                if (i_sysCfgJsonObj["frus"][l_fruPath]
+                        .at(0)["pollingRequired"]["hotPlugging"]
+                        .contains("gpioPresence"))
+                {
+                    l_gpioPollingRequiredFrusList.push_back(l_fruPath);
+                }
+            }
+        }
+        catch (const std::exception& l_ex)
+        {
+            logging::logMessage(l_ex.what());
+        }
+    }
+
+    return l_gpioPollingRequiredFrusList;
+}
+
+/**
+ * @brief Get all related path(s) to update keyword value.
+ *
+ * Given FRU EEPROM path/Inventory path needs keyword's value update, this API
+ * returns tuple of FRU EEPROM path, inventory path and redundant EEPROM path if
+ * exists in the system config JSON.
+ *
+ * Note: If the inventory object path or redundant EEPROM path(s) are not found
+ * in the system config JSON, corresponding fields will have empty value in the
+ * returning tuple.
+ *
+ * @param[in] i_sysCfgJsonObj - System config JSON object.
+ * @param[in,out] io_vpdPath - Inventory object path or FRU EEPROM path.
+ *
+ * @return On success returns tuple of EEPROM path, inventory path & redundant
+ * path, on failure returns tuple with given input path alone.
+ */
+inline std::tuple<std::string, std::string, std::string>
+    getAllPathsToUpdateKeyword(const nlohmann::json& i_sysCfgJsonObj,
+                               std::string io_vpdPath)
+{
+    types::Path l_inventoryObjPath;
+    types::Path l_redundantFruPath;
+    try
+    {
+        if (!i_sysCfgJsonObj.empty())
+        {
+            // Get hardware path from system config JSON.
+            const types::Path l_fruPath =
+                jsonUtility::getFruPathFromJson(i_sysCfgJsonObj, io_vpdPath);
+
+            if (!l_fruPath.empty())
+            {
+                io_vpdPath = l_fruPath;
+
+                // Get inventory object path from system config JSON
+                l_inventoryObjPath = jsonUtility::getInventoryObjPathFromJson(
+                    i_sysCfgJsonObj, l_fruPath);
+
+                // Get redundant hardware path if present in system config JSON
+                l_redundantFruPath =
+                    jsonUtility::getRedundantEepromPathFromJson(i_sysCfgJsonObj,
+                                                                l_fruPath);
+            }
+        }
+    }
+    catch (const std::exception& l_exception)
+    {
+        logging::logMessage(
+            "Failed to get all paths to update keyword value, error " +
+            std::string(l_exception.what()));
+    }
+    return std::make_tuple(io_vpdPath, l_inventoryObjPath, l_redundantFruPath);
+}
+
+/**
+ * @brief An API to get DBus service name.
+ *
+ * Given DBus inventory path, this API returns DBus service name if present in
+ * the JSON.
+ *
+ * @param[in] i_sysCfgJsonObj - System config JSON object.
+ * @param[in] l_inventoryPath - DBus inventory path.
+ *
+ * @return On success returns the service name present in the system config
+ * JSON, otherwise empty string.
+ *
+ * Note: Caller has to handle in case of empty string received.
+ */
+inline std::string getServiceName(const nlohmann::json& i_sysCfgJsonObj,
+                                  const std::string& l_inventoryPath)
+{
+    try
+    {
+        if (l_inventoryPath.empty())
+        {
+            throw std::runtime_error("Path parameter is empty.");
+        }
+
+        if (!i_sysCfgJsonObj.contains("frus"))
+        {
+            throw std::runtime_error("Missing frus tag in system config JSON.");
+        }
+
+        const nlohmann::json& l_listOfFrus =
+            i_sysCfgJsonObj["frus"].get_ref<const nlohmann::json::object_t&>();
+
+        for (const auto& l_frus : l_listOfFrus.items())
+        {
+            for (const auto& l_inventoryItem : l_frus.value())
+            {
+                if (l_inventoryPath.compare(l_inventoryItem["inventoryPath"]) ==
+                    constants::STR_CMP_SUCCESS)
+                {
+                    return l_inventoryItem["serviceName"];
+                }
+            }
+        }
+        throw std::runtime_error(
+            "Inventory path not found in the system config JSON");
+    }
+    catch (const std::exception& l_exception)
+    {
+        logging::logMessage(
+            "Error while getting DBus service name for given path " +
+            l_inventoryPath + ", error: " + std::string(l_exception.what()));
+        // TODO:log PEL
+    }
+    return std::string{};
+}
+
+/**
+ * @brief An API to check if a FRU is tagged as "powerOffOnly"
+ *
+ * Given the system config JSON and VPD FRU path, this API checks if the FRU
+ * VPD can be collected at Chassis Power Off state only.
+ *
+ * @param[in] i_sysCfgJsonObj - System config JSON object.
+ * @param[in] i_vpdFruPath - EEPROM path.
+ * @return - True if FRU VPD can be collected at Chassis Power Off state only.
+ *           False otherwise
+ */
+inline bool isFruPowerOffOnly(const nlohmann::json& i_sysCfgJsonObj,
+                              const std::string& i_vpdFruPath)
+{
+    if (i_vpdFruPath.empty())
+    {
+        logging::logMessage("FRU path is empty.");
+        return false;
+    }
+
+    if (!i_sysCfgJsonObj.contains("frus"))
+    {
+        logging::logMessage("Missing frus tag in system config JSON.");
+        return false;
+    }
+
+    if (!i_sysCfgJsonObj["frus"].contains(i_vpdFruPath))
+    {
+        logging::logMessage("JSON object does not contain EEPROM path \'" +
+                            i_vpdFruPath + "\'");
+        return false;
+    }
+
+    return ((i_sysCfgJsonObj["frus"][i_vpdFruPath].at(0))
+                .contains("powerOffOnly") &&
+            (i_sysCfgJsonObj["frus"][i_vpdFruPath].at(0)["powerOffOnly"]));
+}
+
+/**
+ * @brief API which tells if the FRU is replaceable at runtime
+ *
+ * @param[in] i_sysCfgJsonObj - System config JSON object.
+ * @param[in] i_vpdFruPath - EEPROM path.
+ *
+ * @return true if FRU is replaceable at runtime. false otherwise.
+ */
+inline bool isFruReplaceableAtRuntime(const nlohmann::json& i_sysCfgJsonObj,
+                                      const std::string& i_vpdFruPath)
+{
+    try
+    {
+        if (i_vpdFruPath.empty())
+        {
+            throw std::runtime_error("Given FRU path is empty.");
+        }
+
+        if (i_sysCfgJsonObj.empty() || (!i_sysCfgJsonObj.contains("frus")))
+        {
+            throw std::runtime_error("Invalid system config JSON object.");
+        }
+
+        return ((i_sysCfgJsonObj["frus"][i_vpdFruPath].at(0))
+                    .contains("replaceableAtRuntime") &&
+                (i_sysCfgJsonObj["frus"][i_vpdFruPath].at(
+                    0)["replaceableAtRuntime"]));
+    }
+    catch (const std::exception& l_error)
+    {
+        // TODO: Log PEL
+        logging::logMessage(l_error.what());
+    }
+
+    return false;
+}
+
+/**
+ * @brief API which tells if the FRU is replaceable at standby
+ *
+ * @param[in] i_sysCfgJsonObj - System config JSON object.
+ * @param[in] i_vpdFruPath - EEPROM path.
+ *
+ * @return true if FRU is replaceable at standby. false otherwise.
+ */
+inline bool isFruReplaceableAtStandby(const nlohmann::json& i_sysCfgJsonObj,
+                                      const std::string& i_vpdFruPath)
+{
+    try
+    {
+        if (i_vpdFruPath.empty())
+        {
+            throw std::runtime_error("Given FRU path is empty.");
+        }
+
+        if (i_sysCfgJsonObj.empty() || (!i_sysCfgJsonObj.contains("frus")))
+        {
+            throw std::runtime_error("Invalid system config JSON object.");
+        }
+
+        return ((i_sysCfgJsonObj["frus"][i_vpdFruPath].at(0))
+                    .contains("replaceableAtStandby") &&
+                (i_sysCfgJsonObj["frus"][i_vpdFruPath].at(
+                    0)["replaceableAtStandby"]));
+    }
+    catch (const std::exception& l_error)
+    {
+        // TODO: Log PEL
+        logging::logMessage(l_error.what());
+    }
+
+    return false;
+}
+
+/**
+ * @brief API to get list of FRUs replaceable at standby from JSON.
+ *
+ * The API will return a vector of FRUs inventory path which are replaceable at
+ * standby.
+ * The API can throw exception in case of error scenarios. Caller's
+ * responsibility to handle those exceptions.
+ *
+ * @param[in] i_sysCfgJsonObj - System config JSON object.
+ *
+ * @return - List of FRUs replaceable at standby.
+ */
+inline std::vector<std::string>
+    getListOfFrusReplaceableAtStandby(const nlohmann::json& i_sysCfgJsonObj)
+{
+    std::vector<std::string> l_frusReplaceableAtStandby;
+
+    if (!i_sysCfgJsonObj.contains("frus"))
+    {
+        logging::logMessage("Missing frus tag in system config JSON.");
+        return l_frusReplaceableAtStandby;
+    }
+
+    const nlohmann::json& l_fruList =
+        i_sysCfgJsonObj["frus"].get_ref<const nlohmann::json::object_t&>();
+
+    for (const auto& l_fru : l_fruList.items())
+    {
+        if (i_sysCfgJsonObj["frus"][l_fru.key()].at(0).value(
+                "replaceableAtStandby", false))
+        {
+            const std::string& l_inventoryObjectPath =
+                i_sysCfgJsonObj["frus"][l_fru.key()].at(0).value(
+                    "inventoryPath", "");
+
+            if (!l_inventoryObjectPath.empty())
+            {
+                l_frusReplaceableAtStandby.emplace_back(l_inventoryObjectPath);
+            }
+        }
+    }
+
+    return l_frusReplaceableAtStandby;
+}
+
+} // namespace jsonUtility
+} // namespace vpd