diff --git a/CHANGELOG.md b/CHANGELOG.md
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--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,5 @@
+# Changelog
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
+and this project adheres to the [Haskell Package Versioning Policy](https://pvp.haskell.org/).
diff --git a/LICENSE b/LICENSE
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--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,22 @@
+Copyright © 2019 Brandon Hamilton
+
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated documentation
+files (the "Software"), to deal in the Software without
+restriction, including without limitation the rights to use,
+copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
diff --git a/Setup.hs b/Setup.hs
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--- /dev/null
+++ b/Setup.hs
@@ -0,0 +1,2 @@
+import Distribution.Simple
+main = defaultMain
diff --git a/refined-http-api-data.cabal b/refined-http-api-data.cabal
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--- /dev/null
+++ b/refined-http-api-data.cabal
@@ -0,0 +1,32 @@
+cabal-version:       >=1.10
+name:                refined-http-api-data
+version:             0.1.0.0
+synopsis:            http-api-data instances for refined types
+description:         Orphan instances of Web.HttpApiData for refinement types
+category:            Data
+license:             MIT
+license-file:        LICENSE
+author:              Brandon Hamilton
+maintainer:          brandon.hamilton@gmail.com
+copyright:           Copyright © 2019 Brandon Hamilton
+build-type:          Simple
+extra-source-files:  CHANGELOG.md
+tested-with:         GHC == 8.0.2
+                   , GHC == 8.2.2
+                   , GHC == 8.4.4
+                   , GHC == 8.6.5
+                   , GHC == 8.8.1
+
+library
+  hs-source-dirs:      src
+  exposed-modules:     Refined.Orphan.HttpApiData
+  default-language:    Haskell2010
+  ghc-options:         -Wall
+  build-depends:       base >= 4.9.1 && < 4.14
+                     , http-api-data
+                     , refined >= 0.4
+                     , text
+
+source-repository head
+  type:     git
+  location: git://github.com/brandonhamilton/refined-http-api-data.git
diff --git a/src/Refined/Orphan/HttpApiData.hs b/src/Refined/Orphan/HttpApiData.hs
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--- /dev/null
+++ b/src/Refined/Orphan/HttpApiData.hs
@@ -0,0 +1,43 @@
+--------------------------------------------------------------------------------
+
+-- Copyright © 2019 Brandon Hamilton
+--
+-- Permission is hereby granted, free of charge, to any person
+-- obtaining a copy of this software and associated documentation
+-- files (the "Software"), to deal in the Software without
+-- restriction, including without limitation the rights to use,
+-- copy, modify, merge, publish, distribute, sublicense, and/or sell
+-- copies of the Software, and to permit persons to whom the
+-- Software is furnished to do so, subject to the following
+-- conditions:
+--
+-- The above copyright notice and this permission notice shall be
+-- included in all copies or substantial portions of the Software.
+--
+-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+-- EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+-- OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+-- NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+-- HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+-- WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+-- FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+-- OTHER DEALINGS IN THE SOFTWARE.
+
+--------------------------------------------------------------------------------
+
+{-# OPTIONS_GHC -fno-warn-orphans #-}
+
+module Refined.Orphan.HttpApiData () where
+
+import Control.Arrow (left)
+import Control.Exception (Exception(displayException))
+import Control.Monad ((<=<))
+import Data.Text (pack)
+import Web.HttpApiData (FromHttpApiData(parseUrlPiece), ToHttpApiData(toUrlPiece))
+import Refined.Internal (Refined, Predicate, refine, unrefine)
+
+instance (FromHttpApiData a, Predicate p a) => FromHttpApiData (Refined p a) where
+  parseUrlPiece = (left (pack . displayException)) . refine <=< parseUrlPiece
+
+instance (ToHttpApiData a, Predicate p a) => ToHttpApiData (Refined p a) where
+  toUrlPiece = toUrlPiece . unrefine