diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,5 @@
+# Changelog for hipsql-tx-simple
+
+## 0.0.0.0
+
+* Initial release
diff --git a/LICENSE b/LICENSE
new file mode 100644
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,30 @@
+Copyright SimSpace (c) 2022
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+
+    * Neither the name of SimSpace nor the names of other
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/hipsql-tx-simple.cabal b/hipsql-tx-simple.cabal
new file mode 100644
--- /dev/null
+++ b/hipsql-tx-simple.cabal
@@ -0,0 +1,35 @@
+cabal-version: 1.12
+
+name:           hipsql-tx-simple
+version:        0.0.0.0
+description:    Please see the README on GitHub at <https://github.com/simspace/hipsql#readme>
+homepage:       https://github.com/simspace/hipsql#readme
+bug-reports:    https://github.com/simspace/hipsql/issues
+author:         Cary Robbins
+maintainer:     carymrobbins@gmail.com
+copyright:      2022 SimSpace
+license:        BSD3
+license-file:   LICENSE
+build-type:     Simple
+extra-source-files:
+    CHANGELOG.md
+
+source-repository head
+  type: git
+  location: https://github.com/simspace/hipsql
+
+library
+  exposed-modules:
+      Hipsql.Tx.Simple
+  other-modules:
+      Paths_hipsql_tx_simple
+  hs-source-dirs:
+      library
+  ghc-options: -Wall
+  build-depends:
+      base >=4.7 && <5
+    , hipsql-monad >=0.0.0.0 && <1
+    , hipsql-server >=0.0.0.0 && <1
+    , postgresql-simple >=0.6.4 && <1
+    , postgresql-tx >=0.3.0.0 && <1
+  default-language: Haskell2010
diff --git a/library/Hipsql/Tx/Simple.hs b/library/Hipsql/Tx/Simple.hs
new file mode 100644
--- /dev/null
+++ b/library/Hipsql/Tx/Simple.hs
@@ -0,0 +1,25 @@
+-- | Hipsql interop for @postgresql-tx-simple@.
+--
+-- N.B. The 'MonadHipsql' instance for 'TxM' is derived by defining
+-- a 'MonadHipsqlAdapter' instance and importing the orphan from
+-- "Hipsql.Server.Adapter".
+{-# LANGUAGE FlexibleContexts #-}
+{-# LANGUAGE FlexibleInstances #-}
+{-# LANGUAGE UndecidableInstances #-}
+{-# OPTIONS_GHC -fno-warn-orphans #-}
+module Hipsql.Tx.Simple
+  ( hipsql
+  ) where
+
+import Database.PostgreSQL.Tx (TxEnv, TxM, askTxEnv)
+import Database.PostgreSQL.Tx.Unsafe (unsafeRunIOInTxM)
+import Hipsql.Monad (MonadHipsql(hipsql), MonadHipsqlAdapter(hipsqlAcquireLibPQ))
+import Hipsql.Server.Adapter ()
+
+import qualified Database.PostgreSQL.Simple as Simple
+import qualified Database.PostgreSQL.Simple.Internal as Simple.Internal
+
+instance (TxEnv Simple.Connection r) => MonadHipsqlAdapter (TxM r) where
+  hipsqlAcquireLibPQ f = do
+    conn <- askTxEnv
+    unsafeRunIOInTxM $ Simple.Internal.withConnection conn f