diff --git a/src/Web/HttpApiData/Net.hs b/src/Web/HttpApiData/Net.hs
new file mode 100644
--- /dev/null
+++ b/src/Web/HttpApiData/Net.hs
@@ -0,0 +1,45 @@
+-- | This module provides orphan instances for 'ToHttpApiData'
+--   and 'FromHttpApiData' for data types from the @ip@ package.
+
+module Web.HttpApiData.Net () where
+
+import Web.HttpApiData (ToHttpApiData(..),FromHttpApiData(..))
+import Data.Text (Text)
+import Data.Monoid
+import Net.IPv4 (IPv4)
+import Net.Mac (Mac)
+import qualified Data.Text as Text
+import qualified Net.IPv4.Text as IPv4Text
+import qualified Net.IPv4.ByteString.Char8 as IPv4ByteString
+import qualified Net.Mac.Text as MacText
+import qualified Net.Mac.ByteString.Char8 as MacByteString
+
+instance ToHttpApiData Mac where
+  toUrlPiece   = MacText.encode
+  toHeader     = MacByteString.encode
+  toQueryParam = MacText.encode
+
+instance FromHttpApiData Mac where
+  parseUrlPiece   = describeError mac . MacText.decode
+  parseQueryParam = describeError mac . MacText.decode
+  parseHeader     = describeError mac . MacByteString.decode
+
+instance ToHttpApiData IPv4 where
+  toUrlPiece   = IPv4Text.encode
+  toHeader     = IPv4ByteString.encode
+  toQueryParam = IPv4Text.encode
+
+instance FromHttpApiData IPv4 where
+  parseUrlPiece   = describeError ipv4 . IPv4Text.decode
+  parseQueryParam = describeError ipv4 . IPv4Text.decode
+  parseHeader     = describeError ipv4 . IPv4ByteString.decode
+
+mac,ipv4 :: Text
+mac = Text.pack "MAC Address"
+ipv4 = Text.pack "IPv4 Address"
+
+describeError :: Text -> Maybe a -> Either Text a
+describeError name x = case x of
+  Nothing -> Left (Text.pack "could not parse " <> name)
+  Just a  -> Right a
+
diff --git a/yesod-ip.cabal b/yesod-ip.cabal
--- a/yesod-ip.cabal
+++ b/yesod-ip.cabal
@@ -1,5 +1,5 @@
 name:                yesod-ip
-version:             0.4
+version:             0.4.1
 synopsis:            Code for using the ip package with yesod
 description:         Please see README.md
 homepage:            https://github.com/andrewthad/yesod-ip#readme
@@ -20,6 +20,7 @@
     Database.Persist.Net.Simple
     Database.Persist.Net.PostgreSQL
     Web.PathPieces.Net
+    Web.HttpApiData.Net
   build-depends:       
       base >= 4.7 && < 5
     , text
@@ -27,6 +28,7 @@
     , yesod-form
     , persistent
     , path-pieces
+    , http-api-data
     , ip   >= 0.6.0 && < 0.7.0
   default-language:    Haskell2010