diff --git a/mmcli.py b/mmcli.py
index bdc5857..b58bf50 100755
--- a/mmcli.py
+++ b/mmcli.py
@@ -167,6 +167,21 @@ def login(mm_api, parsed):
 		assert False
 
 
+def lschan(mm_api: mattermost.MMApi, parsed):
+	teams = {}
+
+	for team in mm_api.get_teams():
+		teams[team["id"]] = team
+		teams[team["id"]]["joined"] = False
+
+	for team in mm_api._get(f"/v4/users/me/teams"):
+		teams[team["id"]] = team
+		teams[team["id"]]["joined"] = True
+
+	mm_api.get_team_channels()
+	mm_api.get_channels_for_user("me")
+
+
 def cat(mm_api: mattermost.MMApi, parsed):
 
 	# channels = [
@@ -286,6 +301,7 @@ def str_for_post(attribute, post, parsed):
 
 
 ACTIONS = {
+	"lschan": {"function": lschan},
 	"login": {"function": login, "accesstoken_required": False},
 	"cat": {"function": cat},
 	"send": {"function": send},
@@ -332,6 +348,9 @@ Hint: JSON output can be filtered on the command line with jq(1).
 	parser_login.add_argument("--password", default=os.getenv(ENVVAR_PASSWORD))
 	parser_login.add_argument("--totp", default=os.getenv(ENVVAR_TOTP))
 
+	parser_cat = subparsers.add_parser("lschan", help="list channels")
+	parser_cat.add_argument("-f", "--follow", action="store_true", help="keep running, printing changes to channels as they come in")
+
 	# TODO support multiple channels
 	# parser_cat = subparsers.add_parser("cat", help="list messages in channel(s)")
 	# parser_cat.add_argument(