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diff --git a/lambda-calcul/haskell/src/Minilang/API.hs b/lambda-calcul/haskell/src/Minilang/API.hs
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+{-# LANGUAGE DataKinds #-}
+{-# LANGUAGE TypeOperators #-}
+{-# LANGUAGE DeriveAnyClass #-}
+
+module Minilang.API where
+
+import Data.Time (UTCTime)
+import Servant (Get, JSON, (:>))
+import GHC.Generics (Generic)
+import Data.Aeson (ToJSON, FromJSON)
+
+data Score = Score
+  { name :: String,
+    grade :: Int,
+    lastTest :: UTCTime
+  }
+  deriving (Eq, Show, Generic, ToJSON, FromJSON)
+
+type LambdaAPI = "api" :> "leaderboard" :> Get '[JSON] [Score]