diff --git a/ircrobots/interface.py b/ircrobots/interface.py
index 121f6e1..6661281 100644
--- a/ircrobots/interface.py
+++ b/ircrobots/interface.py
@@ -6,6 +6,7 @@ from ircstates import Server
 from irctokens import Line
 
 from .ircv3 import Capability
+from .sasl  import SASLParams
 
 @dataclass
 class ConnectionParams(object):
@@ -18,6 +19,8 @@ class ConnectionParams(object):
     realname: Optional[str] = None
     bindhost: Optional[str] = None
 
+    sasl: Optional[SASLParams] = None
+
 class SendPriority(IntEnum):
     HIGH   = 0
     MEDIUM = 10
diff --git a/ircrobots/ircv3.py b/ircrobots/ircv3.py
index 7c4ec3d..9c541dd 100644
--- a/ircrobots/ircv3.py
+++ b/ircrobots/ircv3.py
@@ -29,6 +29,7 @@ class Capability(object):
             alias=self.alias,
             depends_on=self.depends_on[:])
 
+CAP_SASL = Capability("sasl")
 CAPS = [
     Capability("multi-prefix"),
     Capability("chghost"),
diff --git a/ircrobots/sasl.py b/ircrobots/sasl.py
new file mode 100644
index 0000000..925bad2
--- /dev/null
+++ b/ircrobots/sasl.py
@@ -0,0 +1,14 @@
+from typing import Optional
+from dataclasses import dataclass
+
+@dataclass
+class SASLParams(object):
+    mechanism: str
+    username:  Optional[str] = None
+    password:  Optional[str] = None
+class SASLUserPass(SASLParams):
+    def __init__(self, username: str, password: str):
+        super().__init__("USERPASS", username, password)
+class SASLExternal(SASLParams):
+    def __init__(self):
+        super().__init__("EXTERNAL")