diff --git a/monitor.c b/monitor.c
index d5377de..082c29d 100644
--- a/monitor.c
+++ b/monitor.c
@@ -1614,7 +1614,7 @@ static void release_keys(void *opaque)
     }
 }
 
-static void do_sendkey(Monitor *mon, const QDict *qdict)
+static int do_sendkey(Monitor *mon, const QDict *qdict, QObject **ret_data)
 {
     char keyname_buf[16];
     char *separator;
@@ -1636,18 +1636,18 @@ static void do_sendkey(Monitor *mon, const QDict *qdict)
         if (keyname_len > 0) {
             pstrcpy(keyname_buf, sizeof(keyname_buf), string);
             if (keyname_len > sizeof(keyname_buf) - 1) {
-                monitor_printf(mon, "invalid key: '%s...'\n", keyname_buf);
-                return;
+                qerror_report(QERR_INVALID_KEY, keyname_buf);
+                return -1;
             }
             if (i == MAX_KEYCODES) {
-                monitor_printf(mon, "too many keys\n");
-                return;
+                qerror_report(QERR_TOO_MANY_KEYS);
+                return -1;
             }
             keyname_buf[keyname_len] = 0;
             keycode = get_keycode(keyname_buf);
             if (keycode < 0) {
-                monitor_printf(mon, "unknown key: '%s'\n", keyname_buf);
-                return;
+                qerror_report(QERR_UNKNOWN_KEY, keyname_buf);
+                return -1;
             }
             keycodes[i++] = keycode;
         }
@@ -1666,6 +1666,7 @@ static void do_sendkey(Monitor *mon, const QDict *qdict)
     /* delayed key up events */
     qemu_mod_timer(key_timer, qemu_get_clock(vm_clock) +
                    muldiv64(get_ticks_per_sec(), hold_time, 1000));
+    return 0;
 }
 
 static int mouse_button_state;
diff --git a/qemu-monitor.hx b/qemu-monitor.hx
index f7e46c4..8b6cf09 100644
--- a/qemu-monitor.hx
+++ b/qemu-monitor.hx
@@ -532,7 +532,8 @@ ETEXI
         .args_type  = "string:s,hold_time:i?",
         .params     = "keys [hold_ms]",
         .help       = "send keys to the VM (e.g. 'sendkey ctrl-alt-f1', default hold time=100 ms)",
-        .mhandler.cmd = do_sendkey,
+        .user_print = monitor_user_noop,
+        .mhandler.cmd_new = do_sendkey,
     },
 
 STEXI
@@ -549,6 +550,25 @@ sendkey ctrl-alt-f1
 This command is useful to send keys that your graphical user interface
 intercepts at low level, such as @code{ctrl-alt-f1} in X Window.
 ETEXI
+SQMP
+sendkey
+-------
+
+Send keys to the emulator.
+
+Arguments:
+
+- "string": key names or key codes in hexadecimal format separated by dashes (json-string)
+- "hold_time": duration in milliseconds to hold the keys down (json-int, optional, default=100)
+
+Example:
+
+-> { "execute": "sendkey", "arguments": { "string": "ctrl-alt-f1" } }
+<- { "return": {} }
+
+Note: if several keys are given they are pressed simultaneously.
+
+EQMP
 
     {
         .name       = "system_reset",
diff --git a/qerror.c b/qerror.c
index 44d0bf8..34a698e 100644
--- a/qerror.c
+++ b/qerror.c
@@ -117,6 +117,10 @@ static const QErrorStringTable qerror_table[] = {
         .desc      = "Invalid block format '%(name)'",
     },
     {
+        .error_fmt = QERR_INVALID_KEY,
+        .desc      = "Invalid key '%(key)...'",
+    },
+    {
         .error_fmt = QERR_INVALID_PARAMETER,
         .desc      = "Invalid parameter '%(name)'",
     },
@@ -185,10 +189,18 @@ static const QErrorStringTable qerror_table[] = {
         .desc      = "Too many open files",
     },
     {
+        .error_fmt = QERR_TOO_MANY_KEYS,
+        .desc      = "Too many keys",
+    },
+    {
         .error_fmt = QERR_UNDEFINED_ERROR,
         .desc      = "An undefined error has ocurred",
     },
     {
+        .error_fmt = QERR_UNKNOWN_KEY,
+        .desc      = "Unknown key '%(key)'",
+    },
+    {
         .error_fmt = QERR_VNC_SERVER_FAILED,
         .desc      = "Could not start VNC server on %(target)",
     },
diff --git a/qerror.h b/qerror.h
index 77ae574..a23630c 100644
--- a/qerror.h
+++ b/qerror.h
@@ -103,6 +103,9 @@ QError *qobject_to_qerror(const QObject *obj);
 #define QERR_INVALID_BLOCK_FORMAT \
     "{ 'class': 'InvalidBlockFormat', 'data': { 'name': %s } }"
 
+#define QERR_INVALID_KEY \
+    "{ 'class': 'InvalidKey', 'data': { 'key': %s } }"
+
 #define QERR_INVALID_PARAMETER \
     "{ 'class': 'InvalidParameter', 'data': { 'name': %s } }"
 
@@ -154,9 +157,15 @@ QError *qobject_to_qerror(const QObject *obj);
 #define QERR_TOO_MANY_FILES \
     "{ 'class': 'TooManyFiles', 'data': {} }"
 
+#define QERR_TOO_MANY_KEYS \
+    "{ 'class': 'TooManyKeys', 'data': {} }"
+
 #define QERR_UNDEFINED_ERROR \
     "{ 'class': 'UndefinedError', 'data': {} }"
 
+#define QERR_UNKNOWN_KEY \
+    "{ 'class': 'UnknownKey', 'data': { 'key': %s } }"
+
 #define QERR_VNC_SERVER_FAILED \
     "{ 'class': 'VNCServerFailed', 'data': { 'target': %s } }"
 
