diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index b948dda7..6e9ca6c9 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -97,7 +97,10 @@ dependencies {
     implementation(project(":feature_data_edit"))
     implementation(project(":feature_records_filter"))
     implementation(project(":feature_goals"))
+    implementation(project(":wearrpc"))
 
+    implementation("com.google.android.gms:play-services-wearable:18.0.0")
+    implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.7.1")
     implementation(Deps.Androidx.room)
     implementation(Deps.Ktx.navigationFragment)
     implementation(Deps.Ktx.navigationUi)
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 1d64b6a0..a91a129a 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -45,6 +45,15 @@
                 android:value="true" />
         </service>
 
+        <service
+            android:name=".wear.WearService"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="com.google.android.gms.wearable.REQUEST_RECEIVED" />
+                <data android:scheme="wear" android:host="*"
+                    android:pathPrefix="/stt" />
+            </intent-filter>
+        </service>
     </application>
 
     <queries>
diff --git a/app/src/main/java/com/example/util/simpletimetracker/wear/DomainAPI.kt b/app/src/main/java/com/example/util/simpletimetracker/wear/DomainAPI.kt
new file mode 100644
index 00000000..b0f12f3d
--- /dev/null
+++ b/app/src/main/java/com/example/util/simpletimetracker/wear/DomainAPI.kt
@@ -0,0 +1,43 @@
+package com.example.util.simpletimetracker.wear
+
+import com.example.util.simpletimetracker.domain.interactor.PrefsInteractor
+import com.example.util.simpletimetracker.domain.interactor.RecordTypeInteractor
+import com.example.util.simpletimetracker.domain.interactor.RunningRecordInteractor
+import com.example.util.simpletimetracker.domain.mapper.AppColorMapper
+import com.example.util.simpletimetracker.wearrpc.Activity
+import com.example.util.simpletimetracker.wearrpc.CurrentActivity
+import com.example.util.simpletimetracker.wearrpc.Settings
+import com.example.util.simpletimetracker.wearrpc.SimpleTimeTrackerAPI
+import com.example.util.simpletimetracker.wearrpc.Tag
+
+class DomainAPI (
+    private val prefsInteractor: PrefsInteractor,
+    private val recordTypeInteractor: RecordTypeInteractor,
+    private val runningRecordInteractor: RunningRecordInteractor,
+    private val appColorMapper: AppColorMapper,
+): SimpleTimeTrackerAPI {
+
+    override suspend fun queryActivities(): Array<Activity> {
+        return recordTypeInteractor.getAll()
+            .filter { recordType -> !recordType.hidden }
+            .map { recordType -> Activity(recordType.id, recordType.name) }
+            .toTypedArray()
+    }
+
+    override suspend fun queryCurrentActivities(): Array<CurrentActivity> {
+        TODO("Not yet implemented")
+    }
+
+    override suspend fun setCurrentActivities(activities: Array<CurrentActivity>) {
+        TODO("Not yet implemented")
+    }
+
+    override suspend fun queryTagsForActivity(activityId: Long): Array<Tag> {
+        TODO("Not yet implemented")
+    }
+
+    override suspend fun querySettings(): Settings {
+        TODO("Not yet implemented")
+    }
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/example/util/simpletimetracker/wear/WearService.kt b/app/src/main/java/com/example/util/simpletimetracker/wear/WearService.kt
new file mode 100644
index 00000000..6ffc92e5
--- /dev/null
+++ b/app/src/main/java/com/example/util/simpletimetracker/wear/WearService.kt
@@ -0,0 +1,52 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+package com.example.util.simpletimetracker.wear
+
+import com.example.util.simpletimetracker.domain.interactor.PrefsInteractor
+import com.example.util.simpletimetracker.domain.interactor.RecordTypeInteractor
+import com.example.util.simpletimetracker.domain.interactor.RunningRecordInteractor
+import com.example.util.simpletimetracker.domain.mapper.AppColorMapper
+import com.example.util.simpletimetracker.wearrpc.WearRPCServer
+import com.google.android.gms.tasks.Task
+import com.google.android.gms.tasks.Tasks
+import com.google.android.gms.wearable.WearableListenerService
+import dagger.hilt.android.AndroidEntryPoint
+import kotlinx.coroutines.runBlocking
+import javax.inject.Inject
+
+/**
+ * Landing point for messages coming to Mobile from Wear.
+ *
+ * Implemented as a Service so that it can receive messages even when the Mobile app is stopped or
+ * in the background.
+ */
+@AndroidEntryPoint
+class WearService : WearableListenerService() {
+
+    @Inject
+    lateinit var prefsInteractor: PrefsInteractor
+
+    @Inject
+    lateinit var recordTypeInteractor: RecordTypeInteractor
+
+    @Inject
+    lateinit var runningRecordInteractor: RunningRecordInteractor
+
+    @Inject
+    lateinit var appColorMapper: AppColorMapper
+
+    override fun onRequest(nodeId: String, path: String, request: ByteArray): Task<ByteArray>? {
+        val rpc = WearRPCServer(
+            DomainAPI(
+                prefsInteractor,
+                recordTypeInteractor,
+                runningRecordInteractor,
+                appColorMapper,
+            ),
+        )
+        return runBlocking { Tasks.forResult(rpc.onRequest(path, request)) }
+    }
+}
diff --git a/app/src/main/res/values/wear.xml b/app/src/main/res/values/wear.xml
new file mode 100644
index 00000000..19fe4bcd
--- /dev/null
+++ b/app/src/main/res/values/wear.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources xmlns:tools="http://schemas.android.com/tools"
+    tools:keep="@array/android_wear_capabilities">
+    <string-array name="android_wear_capabilities">
+        <item>/stt//GET/ping</item>
+        <item>/stt//GET/activities</item>
+        <item>/stt//GET/activities/current</item>
+        <item>/stt//POST/activities/current</item>
+        <item>/stt//GET/activites/:ID/tags</item>
+        <item>/stt//GET/settings</item>
+    </string-array>
+</resources>
\ No newline at end of file