diff --git a/include/watchdog.hpp b/include/watchdog.hpp
new file mode 100644
index 0000000..918885c
--- /dev/null
+++ b/include/watchdog.hpp
@@ -0,0 +1,76 @@
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-FileCopyrightText: Copyright OpenBMC Authors
+#pragma once
+
+#include "bmcweb_config.h"
+
+#include "io_context_singleton.hpp"
+#include "logging.hpp"
+
+#include <systemd/sd-daemon.h>
+
+#include <boost/asio/steady_timer.hpp>
+#include <boost/system/error_code.hpp>
+
+#include <chrono>
+#include <cstdint>
+#include <functional>
+#include <ratio>
+
+namespace bmcweb
+{
+
+class ServiceWatchdog
+{
+  public:
+    ServiceWatchdog() : timer(getIoContext())
+    {
+        uint64_t usecondTimeout = 0;
+        if (sd_watchdog_enabled(0, &usecondTimeout) <= 0)
+        {
+            if (BMCWEB_WATCHDOG_TIMEOUT_SECONDS > 0)
+            {
+                BMCWEB_LOG_WARNING(
+                    "Watchdog timeout was enabled at compile time, but disabled at runtime");
+            }
+            return;
+        }
+        // Pet the watchdog N times faster than required.
+        uint64_t petRatio = 4;
+        watchdogTime = std::chrono::duration<uint64_t, std::micro>(
+            usecondTimeout / petRatio);
+        startTimer();
+    }
+
+  private:
+    void startTimer()
+    {
+        timer.expires_after(watchdogTime);
+        timer.async_wait(
+            std::bind_front(&ServiceWatchdog::handleTimeout, this));
+    }
+
+    void handleTimeout(const boost::system::error_code& ec)
+    {
+        if (ec)
+        {
+            BMCWEB_LOG_ERROR("Watchdog timer async_wait failed: {}",
+                             ec.message());
+            return;
+        }
+
+        int rc = sd_notify(0, "WATCHDOG=1");
+        if (rc < 0)
+        {
+            BMCWEB_LOG_ERROR("sd_notify failed: {}", -rc);
+            return;
+        }
+
+        startTimer();
+    }
+
+    boost::asio::steady_timer timer;
+    std::chrono::duration<uint64_t, std::micro> watchdogTime{};
+};
+
+} // namespace bmcweb