diff --git a/app/Backend/CGI.hs b/app/Backend/CGI.hs
new file mode 100644
index 0000000..9f8997f
--- /dev/null
+++ b/app/Backend/CGI.hs
@@ -0,0 +1 @@
+module Backend.CGI where
diff --git a/app/Backend/FastCGI.hs b/app/Backend/FastCGI.hs
new file mode 100644
index 0000000..e51ba7d
--- /dev/null
+++ b/app/Backend/FastCGI.hs
@@ -0,0 +1 @@
+module Backend.FastCGI where
diff --git a/app/Backend/Http.hs b/app/Backend/Http.hs
new file mode 100644
index 0000000..54e8de7
--- /dev/null
+++ b/app/Backend/Http.hs
@@ -0,0 +1,54 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+module Backend.Http
+  ( HttpConfiguration (..),
+    httpDefaultSettings,
+  )
+where
+
+import Data.String
+import qualified Data.Text as T
+import Network.Wai.Handler.Warp as HTTP
+import Toml (TomlCodec, (.=))
+import Control.Concurrent
+import Control.Concurrent.MVar
+import qualified Toml
+import Validation
+
+-- We leave it as a Text here and defer the conversion to the warp type to the last possible moment.
+-- At least we can touch and print a String. Excepet that we don't use it so we don't need it in another
+-- form
+
+-- even though this is just a String alias, we leave the infrastructure in place. Maybe we want to change that
+-- type at some point. Then we can redifne the stuff to work with our new type.
+-- One can think about this as being accidantally a String, and not by design.
+type BindPreference = String
+
+_BindPreference :: Toml.TomlBiMap BindPreference Toml.AnyValue
+_BindPreference = Toml._String
+
+bindPreference :: Toml.Key -> TomlCodec BindPreference
+bindPreference = Toml.match _BindPreference
+
+data HttpConfiguration = HttpConfiguration
+  { port :: Int,
+    bindPref :: BindPreference
+  }
+
+httpDefaultSettings :: HttpConfiguration
+httpDefaultSettings = HttpConfiguration 80 "*"
+
+-- why a String? Why is the only way to generate a HostPreference by its IsString instance?
+-- why does warp not expose its constructors??
+httpConfigConstructor :: Int -> String -> HTTP.Settings
+httpConfigConstructor port bind = HTTP.setPort port $ HTTP.setHost (fromString bind) HTTP.defaultSettings
+
+httpConfigCodec :: TomlCodec HttpConfiguration
+httpConfigCodec =
+  HttpConfiguration
+    <$> Toml.int "Port" .= port
+    <*> bindPreference "Bind" .= bindPref
+
+forkHttpBackend :: Toml.TOML -> IO [MVar ()]
+forkHttpBackend ast = undefined
+
diff --git a/app/Backend/Https.hs b/app/Backend/Https.hs
new file mode 100644
index 0000000..86e00e0
--- /dev/null
+++ b/app/Backend/Https.hs
@@ -0,0 +1 @@
+module Backend.Https where
diff --git a/package.yaml b/package.yaml
index e0ab188..c3bdb37 100644
--- a/package.yaml
+++ b/package.yaml
@@ -51,6 +51,7 @@ dependencies:
 - wai-websockets
 - http-types
 - tomland
+- validation-selective
 
 when:
   - condition: flag(http)
diff --git a/tickLeisteServer.cabal b/tickLeisteServer.cabal
index 7ea295a..8725117 100644
--- a/tickLeisteServer.cabal
+++ b/tickLeisteServer.cabal
@@ -46,6 +46,10 @@ flag https
 executable tickLeisteServer
   main-is: Main.hs
   other-modules:
+      Backend.CGI
+      Backend.FastCGI
+      Backend.Http
+      Backend.Https
       Config
       WaiApp
       WebSocketApp
@@ -66,6 +70,7 @@ executable tickLeisteServer
     , tickLeiste-aeson
     , tomland
     , uuid
+    , validation-selective
     , wai
     , wai-websockets
     , websockets
@@ -114,6 +119,7 @@ test-suite tickLeisteServer-test
     , tickLeisteServer
     , tomland
     , uuid
+    , validation-selective
     , wai
     , wai-websockets
     , websockets