diff --git a/pg-harness.cabal b/pg-harness.cabal
--- a/pg-harness.cabal
+++ b/pg-harness.cabal
@@ -1,12 +1,12 @@
 Name:                pg-harness
-Version:             0.1.2
-Synopsis:            REST service for creating temporary PostgreSQL databases
+Version:             0.2.0
+Synopsis:            REST service and library for creating/consuming temporary PostgreSQL databases
 Description:
-  REST service for conveniently creating temporary PostgreSQL databases.
-  It is intended for use from tests.
+  REST service and client library for conveniently creating and consuming temporary
+  PostgreSQL databases. This is intended for use from tests.
   .
   See <https://github.com/BardurArantsson/pg-harness/blob/master/README.md README.md> on
-  GitHub for detailed usage instructions.
+  GitHub for detailed usage and setup instructions for the REST service.
 License:             AGPL-3
 License-file:        LICENSE.txt
 Author:              Bardur Arantsson
@@ -43,3 +43,12 @@
                      PgHarness.Configuration
                      PgHarness.Mutex
                      PgHarness.DatabaseId
+
+Library
+  Build-depends:      base == 4.*
+                    , bytestring >= 0.9.0.1
+                    , HTTP >= 4000.2.17 && < 4001
+  Default-language:   Haskell2010
+  Ghc-options:        -Wall
+  Hs-source-dirs:     src
+  Exposed-modules:    Data.PostgreSQL.Harness.Client
diff --git a/src/Data/PostgreSQL/Harness/Client.hs b/src/Data/PostgreSQL/Harness/Client.hs
new file mode 100644
--- /dev/null
+++ b/src/Data/PostgreSQL/Harness/Client.hs
@@ -0,0 +1,71 @@
+{-
+    pg-harness, REST service for creating temporary PostgreSQL databases.
+    Copyright (C) 2014, 2015 Bardur Arantsson
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+-}
+{-|
+
+  Client library for @pg-harness@ REST service.
+
+  Use the 'createTemporaryDatabase' function to create the database.
+
+-}
+module Data.PostgreSQL.Harness.Client
+    ( ConnectionInformation(..)
+    , createTemporaryDatabase
+    , toConnectionString
+    ) where
+
+import           Data.ByteString (ByteString)
+import qualified Data.ByteString.Char8 as B8
+import           Network.HTTP (simpleHTTP, postRequest, getResponseBody)
+
+-- | Connection information to use for connecting to a database.
+data ConnectionInformation = ConnectionInformation
+    { ciHost :: String
+    , ciPort :: String
+    , ciDatabaseName :: String
+    , ciUser :: String
+    , ciPassword :: String
+    }
+
+-- | Create temporary database using the given URL to a
+-- running @pg-harness@ REST service. Returns the connection
+-- information for connecting to the newly created temporary
+-- database.
+createTemporaryDatabase :: String -> IO ConnectionInformation
+createTemporaryDatabase url = do
+  rsp <- simpleHTTP (postRequest url)
+  body <- getResponseBody rsp
+  return $ parse body
+  where
+    parse :: String -> ConnectionInformation
+    parse s =
+      let (userPass, (_:hostPortDatabase)) = break ((==) '@') s in
+      let (user, (_:password)) = break ((==) ':') userPass in
+      let (hostPort, (_:databaseName)) = break ((==) '/') hostPortDatabase in
+      let (host, (_:port)) = break ((==) ':') hostPort in
+        ConnectionInformation host port databaseName user password
+
+-- | Convert connection information to a @libpq@- or
+-- @postgresql-simple@-compatible connection string.
+toConnectionString :: ConnectionInformation -> ByteString
+toConnectionString (ConnectionInformation host port databaseName user password) =
+  B8.pack $
+    "host=" ++ host ++ " " ++
+    "port=" ++ port ++ " " ++
+    "dbname=" ++ databaseName ++ " " ++
+    "user=" ++ user ++ " " ++
+    "password=" ++ password