diff --git a/ircrobots/params.py b/ircrobots/params.py
index 269687e..2462790 100644
--- a/ircrobots/params.py
+++ b/ircrobots/params.py
@@ -1,5 +1,5 @@
-from typing      import Optional
-from dataclasses import dataclass
+from typing      import List, Optional
+from dataclasses import dataclass, field
 
 class SASLParams(object):
     mechanism: str
@@ -47,3 +47,5 @@ class ConnectionParams(object):
     resume: Optional[ResumePolicy] = None
 
     reconnect: int = 10 # seconds
+
+    autojoin:  List[str] = field(default_factory=list)
diff --git a/ircrobots/server.py b/ircrobots/server.py
index 1623876..458ef70 100644
--- a/ircrobots/server.py
+++ b/ircrobots/server.py
@@ -170,6 +170,9 @@ class Server(IServer):
                 await self.send(build("WHO", [self.nickname]))
                 self.set_throttle(THROTTLE_RATE, THROTTLE_TIME)
 
+                if self.params.autojoin:
+                    await self._batch_joins(self.params.autojoin)
+
             elif emit.command == "CAP":
                 if emit.subcommand    == "NEW":
                     await self._cap_ls(emit)
@@ -190,6 +193,16 @@ class Server(IServer):
 
         await self.line_read(line)
 
+    async def _batch_joins(self,
+            channels: List[str],
+            batch_n:  int=10):
+        #TODO: do as many JOINs in one line as we can fit
+        #TODO: channel keys
+
+        for i in range(0, len(channels), batch_n):
+            batch = channels[i:i+batch_n]
+            await self.send(build("JOIN", [",".join(batch)]))
+
     async def _serial_who(self):
         while self._pending_who:
             next = self._pending_who.popleft()