diff --git a/src/Internal/Api/Leave/Api.elm b/src/Internal/Api/Leave/Api.elm
new file mode 100644
index 0000000..7837be0
--- /dev/null
+++ b/src/Internal/Api/Leave/Api.elm
@@ -0,0 +1,40 @@
+module Internal.Api.Leave.Api exposing (..)
+
+import Internal.Api.Request as R
+import Internal.Tools.Context exposing (Context)
+import Internal.Tools.Exceptions as X
+import Json.Decode as D
+import Task exposing (Task)
+
+
+type alias LeaveInputV1 =
+    { roomId : String }
+
+
+type alias LeaveInputV2 =
+    { roomId : String, reason : Maybe String }
+
+
+type alias LeaveOutputV1 =
+    ()
+
+
+leaveV1 : LeaveInputV1 -> Context { a | accessToken : (), baseUrl : () } -> Task X.Error LeaveOutputV1
+leaveV1 { roomId } =
+    R.callApi "POST" "/_matrix/client/r0/rooms/{roomId}/leave"
+        >> R.withAttributes
+            [ R.accessToken
+            , R.replaceInUrl "roomId" roomId
+            ]
+        >> R.toTask (D.map (always ()) D.value)
+
+
+leaveV2 : LeaveInputV2 -> Context { a | accessToken : (), baseUrl : () } -> Task X.Error LeaveOutputV1
+leaveV2 { roomId, reason } =
+    R.callApi "POST" "/_matrix/client/r0/rooms/{roomId}/leave"
+        >> R.withAttributes
+            [ R.accessToken
+            , R.replaceInUrl "roomId" roomId
+            , R.bodyOpString "reason" reason
+            ]
+        >> R.toTask (D.map (always ()) D.value)
diff --git a/src/Internal/Api/Leave/Main.elm b/src/Internal/Api/Leave/Main.elm
new file mode 100644
index 0000000..97f0d18
--- /dev/null
+++ b/src/Internal/Api/Leave/Main.elm
@@ -0,0 +1,48 @@
+module Internal.Api.Leave.Main exposing (..)
+
+import Internal.Api.Leave.Api as Api
+import Internal.Tools.Context as Context exposing (Context, VBA)
+import Internal.Tools.Exceptions as X
+import Internal.Tools.VersionControl as VC
+import Task exposing (Task)
+
+
+leave : Context (VBA a) -> LeaveInput -> Task X.Error LeaveOutput
+leave context input =
+    VC.withBottomLayer
+        { current = Api.leaveV1
+        , version = "r0.0.0"
+        }
+        |> VC.sameForVersion "r0.0.1"
+        |> VC.sameForVersion "r0.1.0"
+        |> VC.sameForVersion "r0.2.0"
+        |> VC.sameForVersion "r0.3.0"
+        |> VC.sameForVersion "r0.4.0"
+        |> VC.sameForVersion "r0.5.0"
+        |> VC.sameForVersion "r0.6.0"
+        |> VC.sameForVersion "r0.6.1"
+        |> VC.addMiddleLayer
+            { downcast =
+                \data ->
+                    { roomId = data.roomId
+                    }
+            , current = Api.leaveV2
+            , upcast = identity
+            , version = "v1.1"
+            }
+        |> VC.sameForVersion "v1.2"
+        |> VC.sameForVersion "v1.3"
+        |> VC.sameForVersion "v1.4"
+        |> VC.sameForVersion "v1.5"
+        |> VC.mostRecentFromVersionList (Context.getVersions context)
+        |> Maybe.withDefault (always <| always <| Task.fail X.UnsupportedSpecVersion)
+        |> (|>) input
+        |> (|>) context
+
+
+type alias LeaveInput =
+    Api.LeaveInputV2
+
+
+type alias LeaveOutput =
+    Api.LeaveOutputV1
diff --git a/src/Internal/Api/Task.elm b/src/Internal/Api/Task.elm
index c55a42f..70d8cbf 100644
--- a/src/Internal/Api/Task.elm
+++ b/src/Internal/Api/Task.elm
@@ -10,6 +10,7 @@ import Internal.Api.GetEvent.Main exposing (EventInput)
 import Internal.Api.Invite.Main exposing (InviteInput)
 import Internal.Api.JoinRoomById.Main exposing (JoinRoomByIdInput)
 import Internal.Api.JoinedMembers.Main exposing (JoinedMembersInput)
+import Internal.Api.Leave.Main exposing (LeaveInput)
 import Internal.Api.SendStateKey.Main exposing (SendStateKeyInput)
 import Internal.Api.Sync.Main exposing (SyncInput)
 import Internal.Api.VaultUpdate as C
@@ -55,6 +56,13 @@ joinRoomById data cred =
         |> C.toTask
 
 
+leave : LeaveInput -> Credentials -> FutureTask
+leave data cred =
+    C.makeVBA cred
+        |> Chain.andThen (C.leave data)
+        |> C.toTask
+
+
 type alias RedactInput =
     { eventId : String
     , extraTransactionNoise : String
diff --git a/src/Internal/Api/VaultUpdate.elm b/src/Internal/Api/VaultUpdate.elm
index c5f0080..968bb59 100644
--- a/src/Internal/Api/VaultUpdate.elm
+++ b/src/Internal/Api/VaultUpdate.elm
@@ -6,6 +6,7 @@ import Internal.Api.GetEvent.Main as GetEvent
 import Internal.Api.Invite.Main as Invite
 import Internal.Api.JoinRoomById.Main as JoinRoomById
 import Internal.Api.JoinedMembers.Main as JoinedMembers
+import Internal.Api.Leave.Main as Leave
 import Internal.Api.LoginWithUsernameAndPassword.Main as LoginWithUsernameAndPassword
 import Internal.Api.Redact.Main as Redact
 import Internal.Api.SendMessageEvent.Main as SendMessageEvent
@@ -27,6 +28,7 @@ type VaultUpdate
     | InviteSent Invite.InviteInput Invite.InviteOutput
     | JoinedMembersToRoom JoinedMembers.JoinedMembersInput JoinedMembers.JoinedMembersOutput
     | JoinedRoom JoinRoomById.JoinRoomByIdInput JoinRoomById.JoinRoomByIdOutput
+    | LeftRoom Leave.LeaveInput Leave.LeaveOutput
     | LoggedInWithUsernameAndPassword LoginWithUsernameAndPassword.LoginWithUsernameAndPasswordInput LoginWithUsernameAndPassword.LoginWithUsernameAndPasswordOutput
     | MessageEventSent SendMessageEvent.SendMessageEventInput SendMessageEvent.SendMessageEventOutput
     | RedactedEvent Redact.RedactInput Redact.RedactOutput
@@ -165,6 +167,19 @@ joinRoomById input =
         input
 
 
+leave : Leave.LeaveInput -> IdemChain VaultUpdate (VBA a)
+leave input =
+    toChain
+        (\output ->
+            Chain.TaskChainPiece
+                { contextChange = identity
+                , messages = [ LeftRoom input output ]
+                }
+        )
+        Leave.leave
+        input
+
+
 loginWithUsernameAndPassword : LoginWithUsernameAndPassword.LoginWithUsernameAndPasswordInput -> TaskChain VaultUpdate (VB a) (VBA a)
 loginWithUsernameAndPassword input =
     toChain
diff --git a/src/Internal/Invite.elm b/src/Internal/Invite.elm
new file mode 100644
index 0000000..4c4a36e
--- /dev/null
+++ b/src/Internal/Invite.elm
@@ -0,0 +1,75 @@
+module Internal.Invite exposing (..)
+
+{-| An invite is an Elm type that informs the user they've been invited to a room.
+-}
+
+import Internal.Api.Credentials exposing (Credentials)
+import Internal.Api.Sync.V2.SpecObjects exposing (StrippedStateEvent)
+import Internal.Api.Task as Api
+import Internal.Api.VaultUpdate exposing (VaultUpdate(..))
+import Internal.Tools.Exceptions as X
+import Internal.Values.RoomInvite as Internal
+import Task exposing (Task)
+
+
+type RoomInvite
+    = RoomInvite
+        { invite : Internal.IRoomInvite
+        , context : Credentials
+        }
+
+
+getRoomId : RoomInvite -> String
+getRoomId =
+    withoutCredentials >> Internal.roomId
+
+
+initFromStrippedStateEvent : { roomId : String, events : List StrippedStateEvent } -> Internal.IRoomInvite
+initFromStrippedStateEvent =
+    Internal.init
+
+
+withCredentials : Credentials -> Internal.IRoomInvite -> RoomInvite
+withCredentials context invite =
+    RoomInvite { context = context, invite = invite }
+
+
+withoutCredentials : RoomInvite -> Internal.IRoomInvite
+withoutCredentials (RoomInvite { invite }) =
+    invite
+
+
+getEvent : { contentType : String, stateKey : String } -> RoomInvite -> Maybe Internal.RoomInviteEvent
+getEvent data =
+    withoutCredentials >> Internal.getEvent data
+
+
+getAllEvents : RoomInvite -> List Internal.RoomInviteEvent
+getAllEvents =
+    withoutCredentials >> Internal.getAllEvents
+
+
+{-| Accept an invite and join the room.
+-}
+accept : { invite : RoomInvite, reason : Maybe String } -> Task X.Error VaultUpdate
+accept { invite, reason } =
+    case invite of
+        RoomInvite data ->
+            Api.joinRoomById
+                { roomId = Internal.roomId data.invite
+                , reason = reason
+                }
+                data.context
+
+
+{-| Reject the invite and do not join the room.
+-}
+reject : { invite : RoomInvite, reason : Maybe String } -> Task X.Error VaultUpdate
+reject { invite, reason } =
+    case invite of
+        RoomInvite data ->
+            Api.leave
+                { roomId = Internal.roomId data.invite
+                , reason = reason
+                }
+                data.context
diff --git a/src/Internal/Values/RoomInvite.elm b/src/Internal/Values/RoomInvite.elm
new file mode 100644
index 0000000..6c5150c
--- /dev/null
+++ b/src/Internal/Values/RoomInvite.elm
@@ -0,0 +1,70 @@
+module Internal.Values.RoomInvite exposing (..)
+
+{-| This module contains the internal version of the `RoomInvite` type.
+-}
+
+import Dict exposing (Dict)
+import Internal.Values.Room exposing (IRoom)
+import Json.Encode as E
+
+
+type IRoomInvite
+    = IRoomInvite
+        { roomId : String
+        , events : Dict ( String, String ) RoomInviteEvent
+        }
+
+
+type RoomInviteEvent
+    = RoomInviteEvent
+        { content : E.Value
+        , sender : String
+        , stateKey : String
+        , contentType : String
+        }
+
+
+init : { roomId : String, events : List { content : E.Value, sender : String, stateKey : String, contentType : String } } -> IRoomInvite
+init data =
+    data.events
+        |> List.map
+            (\event ->
+                ( ( event.contentType, event.stateKey ), RoomInviteEvent event )
+            )
+        |> Dict.fromList
+        |> (\e -> IRoomInvite { roomId = data.roomId, events = e })
+
+
+getEvent : { contentType : String, stateKey : String } -> IRoomInvite -> Maybe RoomInviteEvent
+getEvent data (IRoomInvite { events }) =
+    Dict.get ( data.contentType, data.stateKey ) events
+
+
+getAllEvents : IRoomInvite -> List RoomInviteEvent
+getAllEvents (IRoomInvite { events }) =
+    Dict.values events
+
+
+roomId : IRoomInvite -> String
+roomId (IRoomInvite data) =
+    data.roomId
+
+
+content : RoomInviteEvent -> E.Value
+content (RoomInviteEvent data) =
+    data.content
+
+
+sender : RoomInviteEvent -> String
+sender (RoomInviteEvent data) =
+    data.sender
+
+
+stateKey : RoomInviteEvent -> String
+stateKey (RoomInviteEvent data) =
+    data.stateKey
+
+
+contentType : RoomInviteEvent -> String
+contentType (RoomInviteEvent data) =
+    data.contentType
diff --git a/src/Internal/Vault.elm b/src/Internal/Vault.elm
index eaec74d..7045c4c 100644
--- a/src/Internal/Vault.elm
+++ b/src/Internal/Vault.elm
@@ -13,9 +13,11 @@ import Internal.Api.Sync.Main exposing (SyncInput)
 import Internal.Api.Task as Api
 import Internal.Api.VaultUpdate exposing (VaultUpdate(..))
 import Internal.Event as Event
+import Internal.Invite as Invite
 import Internal.Room as Room
 import Internal.Tools.Exceptions as X
 import Internal.Values.Room as IRoom
+import Internal.Values.RoomInvite exposing (IRoomInvite)
 import Internal.Values.StateManager as StateManager
 import Internal.Values.Vault as Internal
 import Task exposing (Task)
@@ -64,6 +66,14 @@ fromLoginVault { username, password, baseUrl } =
         |> Vault
 
 
+{-| Get a user's invited rooms.
+-}
+getInvites : Vault -> List Invite.RoomInvite
+getInvites (Vault { cred, context }) =
+    Internal.getInvites cred
+        |> List.map (Invite.withCredentials context)
+
+
 {-| Get a room based on its id.
 -}
 getRoomById : String -> Vault -> Maybe Room.Room
@@ -86,50 +96,67 @@ insertRoom =
     Room.withoutCredentials >> insertInternalRoom
 
 
+{-| Join a Matrix room by its id.
+-}
+joinRoomById : String -> Vault -> Task X.Error VaultUpdate
+joinRoomById roomId (Vault { context }) =
+    Api.joinRoomById { roomId = roomId, reason = Nothing } context
+
+
 {-| Update the Vault type with new values
 -}
 updateWith : VaultUpdate -> Vault -> Vault
-updateWith vaultUpdate ((Vault ({ cred, context } as data)) as credentials) =
+updateWith vaultUpdate ((Vault ({ cred, context } as data)) as vault) =
     case vaultUpdate of
         MultipleUpdates updates ->
-            List.foldl updateWith credentials updates
+            List.foldl updateWith vault updates
 
         GetEvent input output ->
-            case getRoomById input.roomId credentials of
+            case getRoomById input.roomId vault of
                 Just room ->
                     output
                         |> Event.initFromGetEvent
                         |> Room.addInternalEvent
                         |> (|>) room
                         |> insertRoom
-                        |> (|>) credentials
+                        |> (|>) vault
 
                 Nothing ->
-                    credentials
+                    vault
 
         -- TODO
         InviteSent _ _ ->
-            credentials
+            vault
 
         -- TODO
         JoinedMembersToRoom _ _ ->
-            credentials
+            vault
 
         -- TODO
-        JoinedRoom _ _ ->
-            credentials
+        JoinedRoom input _ ->
+            cred
+                |> Internal.removeInvite input.roomId
+                |> (\x -> { cred = x, context = context })
+                |> Vault
+
+        -- TODO
+        LeftRoom input _ ->
+            cred
+                |> Internal.removeInvite input.roomId
+                |> (\x -> { cred = x, context = context })
+                |> Vault
 
         -- TODO
         MessageEventSent _ _ ->
-            credentials
+            vault
 
         -- TODO
         RedactedEvent _ _ ->
-            credentials
+            vault
 
         -- TODO
         StateEventSent _ _ ->
-            credentials
+            vault
 
         SyncUpdate input output ->
             let
@@ -141,7 +168,7 @@ updateWith vaultUpdate ((Vault ({ cred, context } as data)) as credentials) =
                         |> Dict.toList
                         |> List.map
                             (\( roomId, jroom ) ->
-                                case getRoomById roomId credentials of
+                                case getRoomById roomId vault of
                                     -- Update existing room
                                     Just room ->
                                         case jroom.timeline of
@@ -176,11 +203,28 @@ updateWith vaultUpdate ((Vault ({ cred, context } as data)) as credentials) =
                                         jroom
                                             |> Room.initFromJoinedRoom { nextBatch = output.nextBatch, roomId = roomId }
                             )
+
+                invites : List IRoomInvite
+                invites =
+                    output.rooms
+                        |> Maybe.map .invite
+                        |> Maybe.withDefault Dict.empty
+                        |> Dict.toList
+                        |> List.map (Tuple.mapSecond .inviteState)
+                        |> List.map (Tuple.mapSecond (Maybe.map .events))
+                        |> List.map (Tuple.mapSecond (Maybe.withDefault []))
+                        |> List.map (\( roomId, events ) -> { roomId = roomId, events = events })
+                        |> List.map Invite.initFromStrippedStateEvent
             in
             cred
+                -- Add new since token
                 |> Internal.addSince output.nextBatch
+                -- Add joined rooms
                 |> List.foldl Internal.insertRoom
                 |> (|>) jRooms
+                -- Add invites
+                |> List.foldl Internal.addInvite
+                |> (|>) invites
                 |> (\x -> { cred = x, context = context })
                 |> Vault
 
@@ -195,7 +239,7 @@ updateWith vaultUpdate ((Vault ({ cred, context } as data)) as credentials) =
             Vault { data | context = Credentials.addToken output.accessToken context }
 
 
-{-| Synchronize credentials
+{-| Synchronize vault
 -}
 sync : Vault -> Task X.Error VaultUpdate
 sync (Vault { cred, context }) =