diff --git a/README.md b/README.md
index 3f74a26f..845b0392 100644
--- a/README.md
+++ b/README.md
@@ -29,12 +29,11 @@ spago test
 
 To start the server you can use the `npm run start` command, for example:
 ```bash
-NETWORK="preview" MARLOWE_WEB_SERVER_URL="http://localhost:3780" npm run start
+MARLOWE_WEB_SERVER_URL="http://localhost:3780" npm run start
 ```
 
 In the previous example:
-- `NETWORK`: Specifies the Cardano network to use. In the example above, it's set to `preview`.
-- `MARLOWE_WEB_SERVER_URL`: Specifies URL for the Marlowe Runtime Web server of the network specified (`NETWORK`).
+- `MARLOWE_WEB_SERVER_URL`: Specifies URL for the Marlowe Runtime Web server.
 
 After this, the Marlowe Runner instance should be available by default at: `http://localhost:8080/`
 
diff --git a/packages.dhall b/packages.dhall
index 2472a940..e8758862 100644
--- a/packages.dhall
+++ b/packages.dhall
@@ -309,6 +309,7 @@ in  upstream
         , "effect"
         , "either"
         , "exceptions"
+        , "foreign-generic"
         , "foldable-traversable"
         , "js-object"
         , "js-promise-aff"
@@ -331,7 +332,7 @@ in  upstream
         "https://github.com/input-output-hk/purescript-cardano-wallet-client.git"
         "main"
 
-  with marlowe-runtime-client =
+  with marlowe-runtime-client = -- ./purescript-marlowe-runtime-client/spago.dhall as Location
       mkPackage
         [ "aff"
         , "aff-promise"
diff --git a/spago.dhall b/spago.dhall
index 34a932ce..391b133d 100644
--- a/spago.dhall
+++ b/spago.dhall
@@ -24,6 +24,7 @@
   , "foldable-traversable"
   , "foreign-object"
   , "formatters"
+  , "free"
   , "functions"
   , "functors"
   , "halogen-subscriptions"
diff --git a/src/Main.purs b/src/Main.purs
index 318bc541..ee5969e7 100644
--- a/src/Main.purs
+++ b/src/Main.purs
@@ -12,6 +12,7 @@ import Contrib.JsonBigInt as JsonBigInt
 import Control.Monad.Reader (runReaderT)
 import Data.Argonaut (Json, decodeJson, (.:))
 import Data.BigInt.Argonaut as BigInt
+import Data.Either (Either(..))
 import Data.Maybe (Maybe(..), fromJust, maybe)
 import Data.Tuple.Nested ((/\))
 import Effect (Effect)
@@ -19,8 +20,9 @@ import Effect.Aff (launchAff_)
 import Effect.Class (liftEffect)
 import Effect.Class.Console as Console
 import Effect.Exception (throw)
+import JS.Unsafe.Stringify (unsafeStringify)
 import Marlowe.Runtime.Web as Marlowe.Runtime.Web
-import Marlowe.Runtime.Web.Types (ServerURL(..))
+import Marlowe.Runtime.Web.Types (HealthCheck(..), NetworkId(..), ServerURL(..))
 import Partial.Unsafe (unsafePartial)
 import React.Basic (createContext)
 import React.Basic.DOM.Client (createRoot, renderRoot)
@@ -33,7 +35,6 @@ import Web.HTML.Window (document)
 type Config =
   { marloweWebServerUrl :: ServerURL
   , develMode :: Boolean
-  , network :: String
   , aboutMarkdown :: String
   }
 
@@ -42,12 +43,10 @@ decodeConfig json = do
   obj <- decodeJson json
   marloweWebServerUrl <- obj .: "marloweWebServerUrl"
   develMode <- obj .: "develMode"
-  network <- obj .: "network"
   aboutMarkdown <- obj .: "aboutMarkdown"
   pure
     { marloweWebServerUrl: ServerURL marloweWebServerUrl
     , develMode
-    , network
     , aboutMarkdown
     }
 
@@ -63,12 +62,7 @@ main configJson = do
     logger =
       if config.develMode then Console.log
       else const (pure unit)
-    runtime = Marlowe.Runtime.Web.runtime config.marloweWebServerUrl
-    -- FIXME: Slotting numbers have to be provided by Marlowe Runtime
-    slotting =
-      case config.network of
-        "mainnet" -> Slotting { slotLength: BigInt.fromInt 1000, slotZeroTime: unsafePartial $ fromJust $ BigInt.fromString "1591566291000" }
-        _ -> Slotting { slotLength: BigInt.fromInt 1000, slotZeroTime: unsafePartial $ fromJust $ BigInt.fromString "1666656000000" }
+    runtime@(Marlowe.Runtime.Web.Runtime { serverURL }) = Marlowe.Runtime.Web.runtime config.marloweWebServerUrl
 
   doc :: HTMLDocument <- document =<< window
   container :: Element <- maybe (throw "Could not find element with id 'app-root'") pure =<<
@@ -76,6 +70,17 @@ main configJson = do
   reactRoot <- createRoot container
   launchAff_ do
 
+    HealthCheck { networkId } <- Marlowe.Runtime.Web.getHealthCheck serverURL >>= case _ of
+      Left err -> liftEffect $ throw $ unsafeStringify err
+      Right healthCheck -> pure healthCheck
+
+    let
+      -- FIXME: Slotting numbers have to be provided by Marlowe Runtime
+      slotting = case networkId of
+          Mainnet -> Slotting { slotLength: BigInt.fromInt 1000, slotZeroTime: unsafePartial $ fromJust $ BigInt.fromString "1591566291000" }
+          _ -> Slotting { slotLength: BigInt.fromInt 1000, slotZeroTime: unsafePartial $ fromJust $ BigInt.fromString "1666656000000" }
+
+
     CardanoMultiplatformLib.importLib >>= case _ of
       Nothing -> liftEffect $ logger "Cardano serialization lib loading failed"
       Just cardanoMultiplatformLib -> do
diff --git a/src/frontend.js b/src/frontend.js
index c4c84527..d86544f4 100644
--- a/src/frontend.js
+++ b/src/frontend.js
@@ -11,7 +11,6 @@ import aboutMarkdown from "../public/about.md";
 const config = {
   develMode: process.env.DEVEL_MODE,
   marloweWebServerUrl: process.env.MARLOWE_WEB_SERVER_URL,
-  network: process.env.NETWORK,
   aboutMarkdown: aboutMarkdown,
 };
 
diff --git a/webpack.js b/webpack.js
index a57c52a9..fb76759b 100644
--- a/webpack.js
+++ b/webpack.js
@@ -21,19 +21,9 @@ function getWebServerUrl() {
   }
 };
 
-function getNetwork() {
-  if(!process.env.NETWORK) {
-    console.log("NETWORK not configured, defaulting to the 'preview' network. For explicitly setting the network, do : export NETWORK=preview");
-    return "preview";
-  } else {
-    return process.env.NETWORK;
-  }
-};
-
 export default function(_env, argv) {
   const develMode = argv.mode == "development";
   const webServerUrl = getWebServerUrl();
-  const network = getNetwork();
 
   return {
     experiments: {
@@ -56,7 +46,6 @@ export default function(_env, argv) {
       new webpack.EnvironmentPlugin({
         MARLOWE_WEB_SERVER_URL: webServerUrl,
         DEVEL_MODE: develMode,
-        NETWORK: network,
       }),
     ],
     output: {