diff --git a/mmcli/mmcli.py b/mmcli/mmcli.py
index fb9e834..bd5c89e 100755
--- a/mmcli/mmcli.py
+++ b/mmcli/mmcli.py
@@ -434,6 +434,31 @@ def removereaction(mm_api: mattermost.MMApi, cmdline_args):
 	mm_api._delete(f"/v4/users/me/posts/{cmdline_args.msgid}/reactions/{cmdline_args.emoji_name}")
 
 
+def str_for_emoji(emoji, cmdline_args):
+	obj = {
+		k: v
+		for k, v in emoji.items()
+		if (v or k == "name") and (k != "update_at" or emoji["update_at"] != emoji["create_at"])
+	}
+
+	if cmdline_args.format == "json":
+		return json.dumps(emoji)
+	if cmdline_args.format == "tsv":
+		name = tsv_escape(emoji.get("name", ""))
+		return f"{emoji['id']}\t{name}"
+
+def listcustomemoji(mm_api: mattermost.MMApi, cmdline_args):
+	page = 0
+	per_page = 200 # Maximum allowed in API
+	response = []
+	while page == 0 or response:
+		response = mm_api._get(f"/v4/emoji?page={page}&per_page={per_page}&sort=name")
+		for emoji in response:
+			print(str_for_emoji(emoji, cmdline_args))
+		page += 1
+
+
+
 def status(mm_api: mattermost.MMApi, cmdline_args):
 	if not cmdline_args.status:
 		raise ValueError("No status selected")
@@ -521,6 +546,7 @@ ACTIONS = {
 	"edit": {"function": edit},
 	"addreaction": {"function": addreaction},
 	"removereaction": {"function": removereaction},
+	"listcustomemoji": {"function": listcustomemoji},
 	"status": {"function": status},
 	"customstatus": {"function": customstatus},
 	"lastread": {"function": lastread},
@@ -632,6 +658,8 @@ The input format accepted on stdin is one JSON object per line. The possible fie
 	parser_removereaction.add_argument("msgid", help="ID of message")
 	parser_removereaction.add_argument("emoji_name", help="name of the emoji to remove (without colons)")
 
+	parser_listcustomemoji = subparsers.add_parser("listcustomemoji", help="list all custom emoji on the server")
+
 	parser_status = subparsers.add_parser("status", help="update user status")
 	parser_status.add_argument("--online",  dest="status", action="store_const", const="online",  help="Set status to online")
 	parser_status.add_argument("--away",    dest="status", action="store_const", const="away",    help="Set status to away")