diff --git a/build.gradle b/build.gradle
index 39e4b4e..dad5f8a 100644
--- a/build.gradle
+++ b/build.gradle
@@ -16,10 +16,10 @@
 
 buildscript {
     repositories {
-        mavenCentral()
+        jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:1.1.3'
+        classpath 'com.android.tools.build:gradle:2.2.3'
     }
 }
 
@@ -31,11 +31,12 @@ repositories {
 
 dependencies {
     compile 'org.microg:unifiednlp-api:1.3.2'
+    compile 'com.android.support:preference-v7:25.1.0'
 }
 
 android {
-    compileSdkVersion 22
-    buildToolsVersion "22.0.0"
+    compileSdkVersion 25
+    buildToolsVersion "25.0.2"
 }
 
 if (file('user.gradle').exists()) {
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index f383232..7dff301 100755
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
-#Wed Jan 14 11:55:04 CET 2015
+#Fri Jan 27 15:08:17 CET 2017
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.2.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-2.14.1-all.zip
diff --git a/src/main/AndroidManifest.xml b/src/main/AndroidManifest.xml
index 15a7e95..b250e75 100644
--- a/src/main/AndroidManifest.xml
+++ b/src/main/AndroidManifest.xml
@@ -1,14 +1,15 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-          android:versionName="1.1.1"
-          android:versionCode="10101"
-          package="org.microg.nlp.backend.nominatim">
+    android:versionName="1.1.1"
+    android:versionCode="10101"
+    package="org.microg.nlp.backend.nominatim">
 
-    <uses-permission android:name="android.permission.INTERNET"/>
+    <uses-permission android:name="android.permission.INTERNET" />
 
     <uses-sdk
         android:minSdkVersion="9"
-        android:targetSdkVersion="22"/>
+        android:targetSdkVersion="25" />
+
     <application
         android:allowBackup="false"
         android:icon="@drawable/ic_launcher"
@@ -17,8 +18,20 @@
             android:name=".BackendService"
             android:label="@string/backend_name">
             <intent-filter>
-                <action android:name="org.microg.nlp.GEOCODER_BACKEND"/>
+                <action android:name="org.microg.nlp.GEOCODER_BACKEND" />
             </intent-filter>
+            <meta-data
+                android:name="org.microg.nlp.BACKEND_SETTINGS_ACTIVITY"
+                android:value="org.microg.nlp.backend.nominatim.SettingsActivity" />
         </service>
+
+        <activity android:name=".SettingsActivity"
+                  android:theme="@style/SettingsTheme"
+            >
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+            </intent-filter>
+        </activity>
     </application>
+
 </manifest>
diff --git a/src/main/java/org/microg/nlp/backend/nominatim/BackendService.java b/src/main/java/org/microg/nlp/backend/nominatim/BackendService.java
index 0a4ec07..9a32c5d 100644
--- a/src/main/java/org/microg/nlp/backend/nominatim/BackendService.java
+++ b/src/main/java/org/microg/nlp/backend/nominatim/BackendService.java
@@ -1,10 +1,12 @@
 package org.microg.nlp.backend.nominatim;
 
 import android.content.Context;
+import android.content.SharedPreferences;
 import android.content.pm.PackageManager;
 import android.location.Address;
 import android.net.Uri;
 import android.os.Build;
+import android.preference.PreferenceManager;
 import android.util.Log;
 
 import org.json.JSONArray;
@@ -21,19 +23,22 @@
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Locale;
+import java.util.Objects;
 import java.util.concurrent.atomic.AtomicBoolean;
 
 public class BackendService extends GeocoderBackendService {
-    private static final String TAG = "NominatimGeocoderBackend";
-    private static final String SERVICE_URL_MAPQUEST = "http://open.mapquestapi.com/nominatim/v1/";
-    private static final String SERVICE_URL_OSM = " http://nominatim.openstreetmap.org/";
+    private static final String TAG = "NominatimGeocoder";
+
+    private static final String SERVICE_URL_MAPQUEST = "https://open.mapquestapi.com/nominatim/v1";
+    private static final String SERVICE_URL_OSM = "https://nominatim.openstreetmap.org";
+
     private static final String REVERSE_GEOCODE_URL =
-            "%sreverse?format=json&accept-language=%s&lat=%f&lon=%f";
+            "%s/reverse?%sformat=json&accept-language=%s&lat=%f&lon=%f";
     private static final String SEARCH_GEOCODE_URL =
-            "%ssearch?format=json&accept-language=%s&addressdetails=1&bounded=1&q=%s&limit=%d";
+            "%s/search?%sformat=json&accept-language=%s&addressdetails=1&bounded=1&q=%s&limit=%d";
     private static final String SEARCH_GEOCODE_WITH_BOX_URL =
-            "%ssearch?format=json&accept-language=%s&addressdetails=1&bounded=1&q=%s&limit=%d" +
-                    "&viewbox=%f,%f,%f,%f";
+            SEARCH_GEOCODE_URL + "&viewbox=%f,%f,%f,%f";
+
     private static final String WIRE_LATITUDE = "lat";
     private static final String WIRE_LONGITUDE = "lon";
     private static final String WIRE_ADDRESS = "address";
@@ -48,10 +53,40 @@ public class BackendService extends GeocoderBackendService {
     private static final String WIRE_COUNTRYNAME = "country";
     private static final String WIRE_COUNTRYCODE = "country_code";
 
+    private String mApiUrl;
+    private String mAPIKey;
+
+    @Override
+    public void onCreate() {
+        super.onCreate();
+        readPrefs();
+    }
+
+    @Override
+    protected void onOpen() {
+        super.onOpen();
+        readPrefs();
+    }
+
+    private void readPrefs() {
+        SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
+
+        if (sp.getString(SettingsActivity.PrefsFragment.apiChoiceToken, "OSM").equals("OSM")) {
+            mApiUrl = SERVICE_URL_OSM;
+            // No API key for OSM
+            mAPIKey = "";
+        } else {
+            mApiUrl = SERVICE_URL_MAPQUEST;
+            mAPIKey = "key=" + sp.getString(SettingsActivity.PrefsFragment.mapQuestApiKeyToken, "NA")
+                    + "&";
+        }
+    }
+
+
     @Override
     protected List<Address> getFromLocation(double latitude, double longitude, int maxResults,
             String locale) {
-        String url = String.format(Locale.US, REVERSE_GEOCODE_URL, SERVICE_URL_MAPQUEST,
+        String url = String.format(Locale.US, REVERSE_GEOCODE_URL, mApiUrl, mAPIKey,
                 locale.split("_")[0], latitude, longitude);
         try {
             JSONObject result = new JSONObject(new AsyncGetRequest(this,
@@ -88,10 +123,10 @@ protected List<Address> getFromLocationName(String locationName, int maxResults,
         String url;
         if (lowerLeftLatitude == 0 && lowerLeftLongitude == 0 && upperRightLatitude == 0 &&
                 upperRightLongitude == 0) {
-            url = String.format(Locale.US, SEARCH_GEOCODE_URL, SERVICE_URL_MAPQUEST,
+            url = String.format(Locale.US, SEARCH_GEOCODE_URL, mApiUrl, mAPIKey,
                     locale.split("_")[0], query, maxResults);
         } else {
-            url = String.format(Locale.US, SEARCH_GEOCODE_WITH_BOX_URL, SERVICE_URL_MAPQUEST,
+            url = String.format(Locale.US, SEARCH_GEOCODE_WITH_BOX_URL, mApiUrl, mAPIKey,
                     locale.split("_")[0], query, maxResults, lowerLeftLongitude,
                     upperRightLatitude, upperRightLongitude, lowerLeftLatitude);
         }
@@ -165,8 +200,8 @@ private Address parseResponse(Locale locale, JSONObject result) throws JSONExcep
     }
 
     private class AsyncGetRequest extends Thread {
-        public static final String USER_AGENT = "User-Agent";
-        public static final String USER_AGENT_TEMPLATE = "UnifiedNlp/%s (Linux; Android %s)";
+        static final String USER_AGENT = "User-Agent";
+        static final String USER_AGENT_TEMPLATE = "UnifiedNlp/%s (Linux; Android %s)";
         private final AtomicBoolean done = new AtomicBoolean(false);
         private final Context context;
         private final String url;
@@ -196,12 +231,12 @@ public void run() {
             }
         }
 
-        public AsyncGetRequest asyncStart() {
+        AsyncGetRequest asyncStart() {
             start();
             return this;
         }
 
-        public byte[] retrieveAllBytes() {
+        byte[] retrieveAllBytes() {
             if (!done.get()) {
                 synchronized (done) {
                     while (!done.get()) {
@@ -216,7 +251,7 @@ public byte[] retrieveAllBytes() {
             return result;
         }
 
-        public String retrieveString() {
+        String retrieveString() {
             return new String(retrieveAllBytes());
         }
 
diff --git a/src/main/java/org/microg/nlp/backend/nominatim/SettingsActivity.java b/src/main/java/org/microg/nlp/backend/nominatim/SettingsActivity.java
new file mode 100644
index 0000000..5387039
--- /dev/null
+++ b/src/main/java/org/microg/nlp/backend/nominatim/SettingsActivity.java
@@ -0,0 +1,93 @@
+package org.microg.nlp.backend.nominatim;
+
+import android.content.SharedPreferences;
+import android.os.Bundle;
+
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.preference.ListPreference;
+import android.support.v7.preference.Preference;
+import android.support.v7.preference.PreferenceFragmentCompat;
+
+public class SettingsActivity extends AppCompatActivity {
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        if (getSupportActionBar() != null) {
+            getSupportActionBar().setTitle(R.string.app_name);
+            getSupportActionBar().show();
+        }
+
+        // Display the fragment as the main content.
+        getSupportFragmentManager()
+                .beginTransaction()
+                .replace(android.R.id.content, new PrefsFragment())
+                .commit();
+    }
+
+    public static class PrefsFragment extends PreferenceFragmentCompat {
+        public static final String catApiKeyToken = "cat_api_preference";
+        public static final String apiChoiceToken = "api_server_choice";
+        public static final String mapQuestApiKeyToken = "api_preference";
+
+        private SharedPreferences shPref;
+        private SharedPreferences.OnSharedPreferenceChangeListener listener;
+
+        private Preference mApiChoicePref;
+        private Preference mCatAPIKeyPref;
+        private Preference mMapQuestApiKeyPref;
+
+        @Override
+        public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
+            shPref = getPreferenceManager().getSharedPreferences();
+
+            // Load the preferences from an XML resource
+            addPreferencesFromResource(R.xml.preferences);
+
+            mApiChoicePref = findPreference(apiChoiceToken);
+            mCatAPIKeyPref = findPreference(catApiKeyToken);
+            mMapQuestApiKeyPref = findPreference(mapQuestApiKeyToken);
+
+            refreshPrefs();
+
+            // Need explicit reference.
+            // See :
+            // http://stackoverflow.com/a/3104265
+            listener = new SharedPreferences.OnSharedPreferenceChangeListener() {
+                @Override
+                public void onSharedPreferenceChanged(SharedPreferences prefs, String key) {
+                    updatePreference(findPreference(key), key);
+                }
+            };
+            shPref.registerOnSharedPreferenceChangeListener(listener);
+
+            mApiChoicePref.setSummary(shPref.getString(apiChoiceToken, "OSM"));
+            mMapQuestApiKeyPref.setSummary(shPref.getString(mapQuestApiKeyToken, ""));
+        }
+
+        private void refreshPrefs() {
+            String apiServer = shPref.getString(apiChoiceToken, "OSM");
+            if (apiServer.equals("OSM")) {
+                getPreferenceScreen().removePreference(mCatAPIKeyPref);
+            } else {
+                getPreferenceScreen().addPreference(mCatAPIKeyPref);
+            }
+        }
+
+        private void updatePreference(Preference preference, String key) {
+            refreshPrefs();
+
+            if (preference == null) {
+                return;
+            }
+
+            if (preference instanceof ListPreference) {
+                ListPreference listPreference = (ListPreference) preference;
+                listPreference.setSummary(listPreference.getEntry());
+                return;
+            }
+
+            preference.setSummary(shPref.getString(key, "Default"));
+        }
+    }
+}
diff --git a/src/main/res/values/arrays.xml b/src/main/res/values/arrays.xml
new file mode 100644
index 0000000..320730f
--- /dev/null
+++ b/src/main/res/values/arrays.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string-array name="ApiChoice">
+        <item>OSM</item>
+        <item>MapQuest</item>
+    </string-array>
+</resources>
diff --git a/src/main/res/values/strings.xml b/src/main/res/values/strings.xml
index ec5cbfd..d81b026 100644
--- a/src/main/res/values/strings.xml
+++ b/src/main/res/values/strings.xml
@@ -1,5 +1,11 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <string name="app_name">NominatimGeocoderBackend</string>
+    <string name="app_name">Nominatim Geocoder Backend</string>
     <string name="backend_name">Nominatim</string>
+
+    <string name="choose_server">Choose Nominatim API Server</string>
+    <string name="server_access">MapQuest Server Access</string>
+    <string name="api_title">MapQuest Developer API Key</string>
+    <string name="api_summary">MapQuest Developer API Key</string>
+    <string name="api_dialog_title">Enter your MapQuest developer API key.</string>
 </resources>
diff --git a/src/main/res/values/themes.xml b/src/main/res/values/themes.xml
new file mode 100644
index 0000000..e3090d8
--- /dev/null
+++ b/src/main/res/values/themes.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <style name="SettingsTheme" parent="Theme.AppCompat.Light.DarkActionBar">
+        <item name="preferenceTheme">@style/PreferenceFragment</item>
+    </style>
+</resources>
diff --git a/src/main/res/xml/preferences.xml b/src/main/res/xml/preferences.xml
new file mode 100644
index 0000000..5b781b7
--- /dev/null
+++ b/src/main/res/xml/preferences.xml
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" >
+
+    <ListPreference
+        android:defaultValue="OSM"
+        android:title="@string/choose_server"
+        android:entries="@array/ApiChoice"
+        android:entryValues="@array/ApiChoice"
+        android:key="api_server_choice"
+        />
+
+    <PreferenceCategory
+        android:key="cat_api_preference"
+        android:title="@string/server_access">
+
+        <EditTextPreference
+            android:key="api_preference"
+            android:title="@string/api_title"
+            android:dialogTitle="@string/api_dialog_title"
+            android:defaultValue=""
+            />
+
+    </PreferenceCategory>
+
+</PreferenceScreen>
\ No newline at end of file