diff --git a/simplex-messaging-api/package.yaml b/simplex-messaging-api/package.yaml
index 23bbf4cbc..be0ab5575 100644
--- a/simplex-messaging-api/package.yaml
+++ b/simplex-messaging-api/package.yaml
@@ -35,6 +35,12 @@ dependencies:
   - servant-server
   - servant-docs
 
+library:
+  source-dirs: simplex-messaging-api/src
+  exposed-modules:
+    - Simplex.Messaging.Types
+    - Simplex.Messaging.ServerAPI
+
 executables:
   simplex-messaging-api:
     source-dirs:      src
diff --git a/simplex-messaging-api/simplex-messaging-api.cabal b/simplex-messaging-api/simplex-messaging-api.cabal
index 24690d73b..befe7e7e0 100644
--- a/simplex-messaging-api/simplex-messaging-api.cabal
+++ b/simplex-messaging-api/simplex-messaging-api.cabal
@@ -4,7 +4,7 @@ cabal-version: 1.12
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: 41b0ad8ab0fefac5df0146b9a45558b3d03f5fff91bafead1f4387a6a08a1fda
+-- hash: 23629656e9233214a3725358fc7625837ba540b728c3cb7bdec37dbdb0f1320c
 
 name:           simplex-messaging-api
 version:        0.1.0.0
@@ -19,6 +19,25 @@ build-type:     Simple
 extra-source-files:
     readme.md
 
+library
+  exposed-modules:
+      Simplex.Messaging.Types
+      Data.StaticText.Class
+      Data.StaticText.TH
+  other-modules:
+      Paths_simplex_messaging_api
+  hs-source-dirs:
+      simplex-messaging-api/src
+  default-extensions: DeriveGeneric DeriveAnyClass DataKinds DuplicateRecordFields FlexibleInstances OverloadedStrings TypeOperators
+  ghc-options: -Wall -Wcompat -Worphans -Werror=incomplete-patterns -Wredundant-constraints -Wincomplete-record-updates -Wincomplete-uni-patterns
+  build-depends:
+      aeson
+    , base >=4.7 && <5
+    , lens
+    , servant-docs
+    , servant-server
+  default-language: Haskell2010
+
 executable simplex-messaging-api
   main-is: Main.hs
   other-modules: