diff --git a/ChangeLog.md b/ChangeLog.md
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--- /dev/null
+++ b/ChangeLog.md
@@ -0,0 +1,4 @@
+# Release history of pdc
+
+## 0.1.1 (2021-12-27)
+- initial Hackage release
diff --git a/LICENSE b/LICENSE
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--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2020 Jens Petersen
+
+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/README.md b/README.md
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+++ b/README.md
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+# PDC web client library
+
+This library provides access to the
+Fedora [PDC](https://pdc.fedoraproject.org/)
+(Product Definition Center)
+web [API](https://pdc.fedoraproject.org/rest_api/v1/).
diff --git a/pdc.cabal b/pdc.cabal
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--- /dev/null
+++ b/pdc.cabal
@@ -0,0 +1,51 @@
+name:                pdc
+version:             0.1.1
+synopsis:            Fedora Product Definition Center service
+description:
+        A http query library for Fedora's PDC service.
+license:             MIT
+license-file:        LICENSE
+category:            Network
+author:              Jens Petersen <juhpetersen@gmail.com>
+maintainer:          Jens Petersen <juhpetersen@gmail.com>
+copyright:           2020  Jens Petersen <juhpetersen@gmail.com>
+build-type:          Simple
+cabal-version:       1.18
+extra-doc-files:     README.md
+                   , ChangeLog.md
+tested-with:         GHC == 8.0.2
+                     GHC == 8.2.2
+                     GHC == 8.4.4
+                     GHC == 8.6.5
+                     GHC == 8.8.3
+
+source-repository head
+  type:                git
+  location:            https://github.com/juhp/pdc-hs.git
+
+library
+  build-depends:       aeson
+                     , base >= 4 && < 5
+                     , http-query
+                     , text
+                     , time
+
+  exposed-modules:     Fedora.PDC
+  hs-source-dirs:      src
+
+  ghc-options:         -Wall
+  if impl(ghc >= 8.0)
+    ghc-options:       -Wcompat
+                       -Widentities
+                       -Wincomplete-uni-patterns
+                       -Wincomplete-record-updates
+                       -Wredundant-constraints
+  if impl(ghc >= 8.2)
+    ghc-options:       -fhide-source-paths
+  if impl(ghc >= 8.4)
+    ghc-options:       -Wmissing-export-lists
+                       -Wpartial-fields
+  if impl(ghc >= 8.10)
+    ghc-options:       -Wunused-packages
+
+  default-language:    Haskell2010
diff --git a/src/Fedora/PDC.hs b/src/Fedora/PDC.hs
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--- /dev/null
+++ b/src/Fedora/PDC.hs
@@ -0,0 +1,209 @@
+{-# LANGUAGE CPP #-}
+{-# LANGUAGE OverloadedStrings #-}
+
+{- |
+Copyright: (c) 2020 Jens Petersen
+SPDX-License-Identifier: MIT
+Maintainer: Jens Petersen <juhpetersen@gmail.com>
+
+Fedora PDC web api client library
+-}
+
+module Fedora.PDC
+  ( fedoraPDC
+  , pdcArches
+  , pdcChangesets
+  , pdcComponentBranches
+  , pdcComponentBranchSLAs
+  , pdcComponentRelationshipTypes
+  , pdcComponentSLATypes
+  , pdcComposes
+  , pdcComposeImages
+  , pdcComposeImageRttTests
+  , pdcComposeRpms
+  , pdcComposeTreeRttTests
+  , pdcContentDeliveryContentFormats
+  , pdcGlobalComponents
+  , pdcImages
+  , pdcModules
+  , pdcProductVersions
+  , pdcProducts
+  , pdcReleases
+  , pdcWhereToFileBugs
+  , pdcRpms
+  , queryPDC
+  , lookupKey
+  , lookupKey'
+  , makeKey
+  , makeItem
+  , maybeKey
+  , Query
+  , QueryItem
+  , getResultsList
+  )
+where
+
+import Data.Aeson.Types
+import Network.HTTP.Query
+
+fedoraPDC :: String
+fedoraPDC = "pdc.fedoraproject.org"
+
+-- | Arch List
+--
+-- https://pdc.fedoraproject.org/rest_api/v1/arches/
+pdcArches :: String -> IO [Object]
+pdcArches server =
+  lookupKey' "results" <$> queryPDC server "arches" []
+
+-- https://pdc.fedoraproject.org/rest_api/v1/auth/ *
+
+-- https://pdc.fedoraproject.org/rest_api/v1/base-products/ no-op?
+
+-- https://pdc.fedoraproject.org/rest_api/v1/bugzilla-components/ no-op?
+
+-- | Changeset List
+--
+-- https://pdc.fedoraproject.org/rest_api/v1/changesets/
+pdcChangesets :: String -> Query -> IO Object
+pdcChangesets server =
+  queryPDC server "changesets"
+
+-- | Sla To Component Branch List
+--
+-- https://pdc.fedoraproject.org/rest_api/v1/component-branch-slas/
+pdcComponentBranchSLAs :: String -> Query -> IO Object
+pdcComponentBranchSLAs server =
+  queryPDC server "component-branch-slas"
+
+-- | Component Branch List
+--
+-- https://pdc.fedoraproject.org/rest_api/v1/component-branches/
+pdcComponentBranches :: String -> Query -> IO Object
+pdcComponentBranches server =
+  queryPDC server "component-branches"
+
+-- | Release Component Relationship Type List
+--
+-- https://pdc.fedoraproject.org/rest_api/v1/component-relationship-types/
+pdcComponentRelationshipTypes :: String -> IO [Object]
+pdcComponentRelationshipTypes server =
+  lookupKey' "results" <$> queryPDC server "component-relationship-types" []
+
+-- | Sla List
+--
+-- https://pdc.fedoraproject.org/rest_api/v1/component-sla-types/
+pdcComponentSLATypes :: String -> Query -> IO [Object]
+pdcComponentSLATypes server params =
+  lookupKey' "results" <$> queryPDC server "component-sla-types" params
+
+-- | Compose Image Rtt Test List
+--
+-- https://pdc.fedoraproject.org/rest_api/v1/compose-image-rtt-tests/ (all untested?)
+pdcComposeImageRttTests :: String -> Query -> IO Object
+pdcComposeImageRttTests server =
+  queryPDC server "compose-image-rtt-tests"
+
+-- | Compose Image Instance
+--
+-- https://pdc.fedoraproject.org/rest_api/v1/compose-images/ {compose_id}/
+pdcComposeImages :: String -> String -> IO Object
+pdcComposeImages server compose =
+  queryPDC server ("compose-images" +/+ compose ++ "/") []
+
+-- | Compose Rpm List (seems heavy)
+--
+-- https://pdc.fedoraproject.org/rest_api/v1/compose-rpms/ {compose_id}/
+pdcComposeRpms :: String -> String -> IO Object
+pdcComposeRpms server compose =
+  queryPDC server ("compose-rpms" +/+ compose ++ "/") []
+
+-- | Compose Tree Rtt Test List
+--
+-- https://pdc.fedoraproject.org/rest_api/v1/compose-tree-rtt-tests/
+pdcComposeTreeRttTests :: String -> Query -> IO Object
+pdcComposeTreeRttTests server =
+  queryPDC server "compose-tree-rtt-tests"
+
+-- | Compose List
+--
+-- https://pdc.fedoraproject.org/rest_api/v1/composes/
+pdcComposes :: String -> Maybe String -> Query -> IO Object
+pdcComposes server mcompose params = do
+  let path = "composes" +/+ maybe "" (++ "/") mcompose
+  queryPDC server path params
+
+-- https://pdc.fedoraproject.org/rest_api/v1/composes/%7Bcompose_id%7D/rpm-mapping/%7Bpackage%7D/
+
+-- | Content Format List
+--
+-- https://pdc.fedoraproject.org/rest_api/v1/content-delivery-content-formats/
+pdcContentDeliveryContentFormats :: String -> Query -> IO [Object]
+pdcContentDeliveryContentFormats server params =
+  lookupKey' "results" <$> queryPDC server "content-delivery-content-formats" params
+
+-- | Global Component List
+--
+-- https://pdc.fedoraproject.org/rest_api/v1/global-components/
+pdcGlobalComponents :: String -> Query -> IO Object
+pdcGlobalComponents server =
+   queryPDC server "global-components"
+
+-- | Image List
+--
+-- https://pdc.fedoraproject.org/rest_api/v1/images/
+pdcImages :: String -> Query -> IO Object
+pdcImages server =
+   queryPDC server "images"
+
+-- | Module List
+--
+-- https://pdc.fedoraproject.org/rest_api/v1/modules/
+pdcModules :: String -> Query -> IO Object
+pdcModules server =
+  queryPDC server "modules"
+
+-- | Product Version List
+--
+-- https://pdc.fedoraproject.org/rest_api/v1/product-versions/
+pdcProductVersions :: String -> Query -> IO [Object]
+pdcProductVersions server params =
+  lookupKey' "results" <$> queryPDC server "product-versions" params
+
+-- | Product List
+--
+-- https://pdc.fedoraproject.org/rest_api/v1/products/
+pdcProducts :: String -> Query -> IO [Object]
+pdcProducts server params =
+  lookupKey' "results" <$> queryPDC server "products" params
+
+-- | Release List
+--
+-- https://pdc.fedoraproject.org/rest_api/v1/releases/
+pdcReleases :: String -> Query -> IO Object
+pdcReleases server =
+  queryPDC server "releases"
+
+-- | Filter Bugzilla Products And Components List
+--
+-- https://pdc.fedoraproject.org/rest_api/v1/rpc/where-to-file-bugs/
+pdcWhereToFileBugs :: String -> Query -> IO Object
+pdcWhereToFileBugs server =
+  queryPDC server "rpc/where-to-file-bugs"
+
+-- | Rpm List
+--
+-- https://pdc.fedoraproject.org/rest_api/v1/rpms/
+pdcRpms :: String -> Query -> IO Object
+pdcRpms server =
+  queryPDC server "rpms"
+
+-- | low-level query
+queryPDC :: String -> String -> Query -> IO Object
+queryPDC server path params =
+  let url = "https://" ++ server +/+ "rest_api/v1" +/+ path
+  in webAPIQuery url params
+
+-- | Get results key from a response object
+getResultsList :: Object -> [Object]
+getResultsList = lookupKey' "results"