diff --git a/src/Internal/Api/All.elm b/src/Internal/Api/All.elm
index 5470748..22a3536 100644
--- a/src/Internal/Api/All.elm
+++ b/src/Internal/Api/All.elm
@@ -2,6 +2,7 @@ module Internal.Api.All exposing (..)
 
 import Hash
 import Internal.Api.GetEvent.Main as GetEvent
+import Internal.Api.Invite.Main as Invite
 import Internal.Api.JoinedMembers.Main as JoinedMembers
 import Internal.Api.PreApi.Main as PreApi
 import Internal.Api.PreApi.Objects.Versions as V
@@ -21,6 +22,7 @@ type CredUpdate
     = MultipleUpdates (List CredUpdate)
       -- Updates as a result of API calls
     | GetEvent GetEvent.EventInput GetEvent.EventOutput
+    | InviteSent Invite.InviteInput Invite.InviteOutput
     | JoinedMembersToRoom JoinedMembers.JoinedMembersInput JoinedMembers.JoinedMembersOutput
     | MessageEventSent SendMessageEvent.SendMessageEventInput SendMessageEvent.SendMessageEventOutput
     | RedactedEvent Redact.RedactInput Redact.RedactOutput
@@ -72,6 +74,44 @@ getEvent data =
         (PreApi.accessToken data.baseUrl data.accessToken)
         (PreApi.versions data.baseUrl data.versions)
 
+type alias InviteInput =
+    { accessToken : AccessToken
+    , baseUrl : String
+    , reason : Maybe String
+    , roomId : String
+    , userId : String
+    , versions : Maybe V.Versions
+    }
+
+{-| Send an invite to join a room.
+-}
+invite : InviteInput -> Future CredUpdate
+invite data =
+    VG.withInfo2
+        (\accessToken versions ->
+            let
+                input : Invite.InviteInput
+                input =
+                    { accessToken = accessToken
+                    , baseUrl = data.baseUrl
+                    , reason = data.reason
+                    , roomId = data.roomId
+                    , userId = data.userId
+                    }
+            in
+            Invite.invite versions.versions input
+                |> Task.map
+                    (\output ->
+                        MultipleUpdates
+                            [ InviteSent input output
+                            , UpdateAccessToken accessToken
+                            , UpdateVersions versions
+                            ]
+                    )
+        )
+        (PreApi.accessToken data.baseUrl data.accessToken)
+        (PreApi.versions data.baseUrl data.versions)
+
 
 type alias JoinedMembersInput =
     { accessToken : AccessToken
diff --git a/src/Internal/Api/Invite/Api.elm b/src/Internal/Api/Invite/Api.elm
new file mode 100644
index 0000000..c410d95
--- /dev/null
+++ b/src/Internal/Api/Invite/Api.elm
@@ -0,0 +1,60 @@
+module Internal.Api.Invite.Api exposing (..)
+
+import Internal.Api.Request as R
+import Internal.Tools.Exceptions as X
+import Json.Decode as D
+import Task exposing (Task)
+
+type alias InviteInputV1 =
+    { accessToken : String
+    , baseUrl : String
+    , roomId : String
+    , userId : String
+    }
+
+type alias InviteInputV2 =
+    { accessToken : String
+    , baseUrl : String
+    , reason : Maybe String
+    , roomId : String
+    , userId : String
+    }
+
+type alias InviteOutputV1 = ()
+
+inviteV1 : InviteInputV1 -> Task X.Error InviteOutputV1
+inviteV1 data =
+    R.rawApiCall
+        { headers = R.WithAccessToken data.accessToken
+        , method = "POST"
+        , baseUrl = data.baseUrl
+        , path = "/_matrix/client/r0/rooms/{roomId}/invite"
+        , pathParams =
+            [ ( "roomId", data.roomId )
+            ]
+        , queryParams = []
+        , bodyParams =
+            [ R.RequiredString "user_id" data.userId
+            ]
+        , timeout = Nothing
+        , decoder = always (D.map (always ()) D.value)
+        }
+        
+inviteV2 : InviteInputV2 -> Task X.Error InviteOutputV1
+inviteV2 data =
+    R.rawApiCall
+        { headers = R.WithAccessToken data.accessToken
+        , method = "POST"
+        , baseUrl = data.baseUrl
+        , path = "/_matrix/client/r0/rooms/{roomId}/invite"
+        , pathParams =
+            [ ( "roomId", data.roomId )
+            ]
+        , queryParams = []
+        , bodyParams =
+            [ R.RequiredString "user_id" data.userId
+            , R.OptionalString "reason" data.reason
+            ]
+        , timeout = Nothing
+        , decoder = always (D.map (always ()) D.value)
+        }
\ No newline at end of file
diff --git a/src/Internal/Api/Invite/Main.elm b/src/Internal/Api/Invite/Main.elm
new file mode 100644
index 0000000..983cee7
--- /dev/null
+++ b/src/Internal/Api/Invite/Main.elm
@@ -0,0 +1,47 @@
+module Internal.Api.Invite.Main exposing (..)
+
+import Internal.Api.Invite.Api as Api
+import Internal.Tools.Exceptions as X
+import Internal.Tools.VersionControl as VC
+import Task exposing (Task)
+
+
+invite : List String -> InviteInput -> Task X.Error InviteOutput
+invite versions =
+    VC.withBottomLayer
+        { current = Api.inviteV1
+        , 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 ->
+                    { accessToken = data.accessToken
+                    , baseUrl = data.baseUrl
+                    , roomId = data.roomId
+                    , userId = data.userId
+                    }
+                )
+            , current = Api.inviteV2
+            , upcast = identity
+            , version = "v1.1"
+            }
+        |> VC.sameForVersion "v1.2"
+        |> VC.sameForVersion "v1.3"
+        |> VC.sameForVersion "v1.4"
+        |> VC.sameForVersion "v1.5"
+        |> VC.mostRecentFromVersionList versions
+        |> Maybe.withDefault (always <| Task.fail X.UnsupportedSpecVersion)
+
+type alias InviteInput =
+    Api.InviteInputV2
+
+type alias InviteOutput =
+    Api.InviteOutputV1
diff --git a/src/Internal/Api/README.md b/src/Internal/Api/README.md
index c430eba..ef644e3 100644
--- a/src/Internal/Api/README.md
+++ b/src/Internal/Api/README.md
@@ -36,9 +36,29 @@ Note that **under development** doesn't always mean that it _will be_ supported.
 | r0.0.1 || ❌ | ✔️ |
 | r0.0.0 || ❌ | ✔️ |
 
+## Changing room member status
+
+| **Spec version** |   | Inviting | Joining room id |
+| ---------------- | - | -------- | --------------- |
+| v1.6   || ⚠️ | ⚠️ |
+| v1.5   || ✔️ | ⚠️ |
+| v1.4   || ✔️ | ⚠️ |
+| v1.3   || ✔️ | ⚠️ |
+| v1.2   || ✔️ | ⚠️ |
+| v1.1   || ✔️ | ⚠️ |
+| r0.6.1 || ✔️ | ⚠️ |
+| r0.6.0 || ✔️ | ⚠️ |
+| r0.5.0 || ✔️ | ⚠️ |
+| r0.4.0 || ✔️ | ⚠️ |
+| r0.3.0 || ✔️ | ⚠️ |
+| r0.2.0 || ✔️ | ⚠️ |
+| r0.1.0 || ✔️ | ⚠️ |
+| r0.0.1 || ✔️ | ⚠️ |
+| r0.0.0 || ✔️ | ⚠️ |
+
 ## Getting events for a room
 
-| **Spec version** | | Event | Joined members | Members | Curren state | State event | Event at timestamp |
+| **Spec version** | | Event | Joined members | Members | Current state | State event | Event at timestamp |
 | ---------------- | - | ----- | -------------- | ------- | ------------ | ----------- | ------------------ |
 | v1.6   || ⚠️ | ⚠️ | ⚠️ | ⚠️ | ⚠️ | ⚠️ |
 | v1.5   || ✔️ | ✔️ | ⚡ | ⚡ | ⚡ | ⛔ |
diff --git a/src/Internal/Credentials.elm b/src/Internal/Credentials.elm
index 7c25ab0..cc3a718 100644
--- a/src/Internal/Credentials.elm
+++ b/src/Internal/Credentials.elm
@@ -106,12 +106,20 @@ updateWith credUpdate ((Credentials ({ cred, context } as data)) as credentials)
                 Nothing ->
                     credentials
 
+        -- TODO
+        Api.InviteSent _ _ ->
+            credentials
+
         Api.JoinedMembersToRoom _ _ ->
             credentials
 
         -- TODO
         Api.MessageEventSent _ _ ->
             credentials
+        
+        -- TODO
+        Api.RedactedEvent _ _ ->
+            credentials
 
         -- TODO
         Api.StateEventSent _ _ ->
diff --git a/src/Internal/Values/Room.elm b/src/Internal/Values/Room.elm
index b95aab4..d16dc0e 100644
--- a/src/Internal/Values/Room.elm
+++ b/src/Internal/Values/Room.elm
@@ -4,7 +4,7 @@ import Dict exposing (Dict)
 import Internal.Tools.Hashdict as Hashdict exposing (Hashdict)
 import Internal.Tools.SpecEnums exposing (SessionDescriptionType(..))
 import Internal.Values.Event exposing (BlindEvent, IEvent)
-import Internal.Values.StateManager exposing (StateManager)
+import Internal.Values.StateManager as StateManager exposing (StateManager)
 import Internal.Values.Timeline as Timeline exposing (Timeline)
 import Json.Encode as E
 
@@ -51,6 +51,12 @@ getEventById : String -> IRoom -> Maybe IEvent
 getEventById eventId (IRoom room) =
     Hashdict.get eventId room.events
 
+getStateEvent : { eventType : String, stateKey : String } -> IRoom -> Maybe IEvent
+getStateEvent data (IRoom room) =
+    room.timeline
+    |> Timeline.mostRecentState
+    |> StateManager.getStateEvent data
+
 
 {-| Get the room's id.
 -}
diff --git a/src/Internal/Values/StateManager.elm b/src/Internal/Values/StateManager.elm
index d496613..d83aad3 100644
--- a/src/Internal/Values/StateManager.elm
+++ b/src/Internal/Values/StateManager.elm
@@ -18,8 +18,8 @@ addEvent event oldManager =
             oldManager
 
 
-getStateEvent : String -> String -> StateManager -> Maybe IEvent
-getStateEvent eventType stateKey =
+getStateEvent : { eventType : String, stateKey : String } -> StateManager -> Maybe IEvent
+getStateEvent { eventType, stateKey } =
     Dict.get ( eventType, stateKey )