diff --git a/bmc/buildjson.cpp b/bmc/buildjson.cpp
new file mode 100644
index 0000000..5c14e61
--- /dev/null
+++ b/bmc/buildjson.cpp
@@ -0,0 +1,136 @@
+/*
+ * Copyright 2019 Google Inc.
+ *
+ * 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 "buildjson.hpp"
+
+#include "file_handler.hpp"
+#include "prepare_systemd.hpp"
+#include "update_systemd.hpp"
+#include "verify_systemd.hpp"
+
+#include <cstdio>
+#include <exception>
+#include <nlohmann/json.hpp>
+#include <sdbusplus/bus.hpp>
+#include <string>
+#include <vector>
+
+namespace ipmi_flash
+{
+
+std::vector<HandlerConfig> buildHandlerFromJson(const nlohmann::json& data)
+{
+    std::vector<HandlerConfig> handlers;
+
+    for (const auto& item : data)
+    {
+        try
+        {
+            HandlerConfig output;
+
+            /* at() throws an exception when the key is not present. */
+            item.at("blob").get_to(output.blobId);
+
+            /* handler is required. */
+            const auto& h = item.at("handler");
+            const std::string handlerType = h.at("type");
+            if (handlerType == "file")
+            {
+                const auto& path = h.at("path");
+                output.handler = std::make_unique<FileHandler>(path);
+            }
+            else
+            {
+                throw std::runtime_error("Invalid handler type: " +
+                                         handlerType);
+            }
+
+            /* actions are required (presently). */
+            const auto& a = item.at("actions");
+            std::unique_ptr<ActionPack> pack = std::make_unique<ActionPack>();
+
+            /* It hasn't been fully determined if any action being optional is
+             * useful, so for now they will be required.
+             * TODO: Evaluate how the behaviors change if some actions are
+             * missing, does the code just assume it was successful?  I would
+             * think not.
+             */
+            const auto& prep = a.at("preparation");
+            const std::string prepareType = prep.at("type");
+            if (prepareType == "systemd")
+            {
+                const auto& unit = prep.at("unit");
+                pack->preparation = SystemdPreparation::CreatePreparation(
+                    sdbusplus::bus::new_default(), unit);
+            }
+            else
+            {
+                throw std::runtime_error("Invalid preparation type: " +
+                                         prepareType);
+            }
+
+            const auto& verify = a.at("verification");
+            const std::string verifyType = verify.at("type");
+            if (verifyType == "fileSystemdVerify")
+            {
+                const auto& path = verify.at("path");
+                const auto& unit = verify.at("unit");
+                pack->verification = SystemdVerification::CreateVerification(
+                    sdbusplus::bus::new_default(), path, unit);
+            }
+            else
+            {
+                throw std::runtime_error("Invalid verification type:" +
+                                         verifyType);
+            }
+
+            const auto& update = a.at("update");
+            const std::string updateType = update.at("type");
+            if (updateType == "reboot")
+            {
+                static constexpr auto rebootTarget = "reboot.target";
+                static constexpr auto rebootMode = "replace-irreversibly";
+                pack->update = SystemdUpdateMechanism::CreateSystemdUpdate(
+                    sdbusplus::bus::new_default(), rebootTarget, rebootMode);
+            }
+            else if (updateType == "systemd")
+            {
+                const auto& unit = update.at("unit");
+                pack->update = SystemdUpdateMechanism::CreateSystemdUpdate(
+                    sdbusplus::bus::new_default(), unit);
+            }
+            else
+            {
+                throw std::runtime_error("Invalid update type: " + updateType);
+            }
+
+            output.actions = std::move(pack);
+            handlers.push_back(std::move(output));
+        }
+        catch (const std::exception& e)
+        {
+            /* TODO: Once phosphor-logging supports unit-test injection, fix
+             * this to log.
+             */
+            std::fprintf(stderr,
+                         "Excepted building HandlerConfig from json: %s\n",
+                         e.what());
+        }
+    }
+
+    return handlers;
+}
+
+} // namespace ipmi_flash