diff --git a/examples/scripts/counter-client.js b/examples/scripts/counter-client.js
index a8cf994cf..9720a3e91 100644
--- a/examples/scripts/counter-client.js
+++ b/examples/scripts/counter-client.js
@@ -13,7 +13,29 @@
  * SPDX-License-Identifier: EPL-2.0 OR W3C-20150513
  ********************************************************************************/
 
-WoTHelpers.fetch("coap://localhost:5683/counter")
+const core_1 = require("@node-wot/core");
+const binding_http_1 = require("@node-wot/binding-http");
+const binding_coap_1 = require("@node-wot/binding-coap");
+// create Servient and add HTTP/CoAP binding
+const servient = new core_1.Servient();
+servient.addClientFactory(new binding_http_1.HttpClientFactory());
+servient.addClientFactory(new binding_coap_1.CoapClientFactory());
+const wotHelper = new core_1.Helpers(servient);
+function getFormIndexForDecrementWithCoAP(thing) {
+    var _a;
+    const forms = (_a = thing.getThingDescription().actions) === null || _a === void 0 ? void 0 : _a.decrement.forms;
+    if (forms !== undefined) {
+        for (let i = 0; i < forms.length; i++) {
+            if (/^coaps?:\/\/.*/.test(forms[i].href)) {
+                return i;
+            }
+        }
+    }
+    // return formIndex: 0 if no CoAP target IRI found
+    return 0;
+}
+wotHelper
+    .fetch("coap://localhost:5683/counter")
     .then(async (td) => {
         // using await for serial execution (note 'async' in then() of fetch())
         try {
@@ -45,13 +67,3 @@ WoTHelpers.fetch("coap://localhost:5683/counter")
     .catch((err) => {
         console.error("Fetch error:", err);
     });
-function getFormIndexForDecrementWithCoAP(thing) {
-    const forms = thing.getThingDescription().actions.decrement.forms;
-    for (let i = 0; i < forms.length; i++) {
-        if (/^coaps?:\/\/.*/.test(forms[i].href)) {
-            return i;
-        }
-    }
-    // return formIndex: 0 if no CoAP target IRI found
-    return 0;
-}
diff --git a/examples/scripts/counter.js b/examples/scripts/counter.js
index ea7828f39..19939def7 100644
--- a/examples/scripts/counter.js
+++ b/examples/scripts/counter.js
@@ -204,7 +204,7 @@ WoT.produce({
             let fill = "black";
             if (options && typeof options === "object" && "uriVariables" in options) {
                 console.log("options = " + JSON.stringify(options));
-                if ("fill" in options.uriVariables) {
+                if (options.uriVariables && "fill" in options.uriVariables) {
                     const uriVariables = options.uriVariables;
                     fill = uriVariables.fill;
                 }
@@ -229,7 +229,7 @@ WoT.produce({
             let step = 1;
             if (options && typeof options === "object" && "uriVariables" in options) {
                 console.log("options = " + JSON.stringify(options));
-                if ("step" in options.uriVariables) {
+                if (options.uriVariables && "step" in options.uriVariables) {
                     const uriVariables = options.uriVariables;
                     step = uriVariables.step;
                 }
@@ -246,7 +246,7 @@ WoT.produce({
             let step = 1;
             if (options && typeof options === "object" && "uriVariables" in options) {
                 console.log("options = " + JSON.stringify(options));
-                if ("step" in options.uriVariables) {
+                if (options.uriVariables && "step" in options.uriVariables) {
                     const uriVariables = options.uriVariables;
                     step = uriVariables.step;
                 }
diff --git a/examples/security/oauth/consumer.js b/examples/security/oauth/consumer.js
index b6a6fd436..24cddf77a 100644
--- a/examples/security/oauth/consumer.js
+++ b/examples/security/oauth/consumer.js
@@ -1,5 +1,5 @@
 /********************************************************************************
- * Copyright (c) 2018 - 2020 Contributors to the Eclipse Foundation
+ * Copyright (c) 2023 Contributors to the Eclipse Foundation
  *
  * See the NOTICE file(s) distributed with this work for additional
  * information regarding copyright ownership.
@@ -12,10 +12,19 @@
  *
  * SPDX-License-Identifier: EPL-2.0 OR W3C-20150513
  ********************************************************************************/
-WoTHelpers.fetch("https://localhost:8080/oauth").then((td) => {
+const core_1 = require("@node-wot/core");
+const binding_http_1 = require("@node-wot/binding-http");
+const binding_coap_1 = require("@node-wot/binding-coap");
+// create Servient and add HTTP/CoAP binding
+const servient = new core_1.Servient();
+servient.addClientFactory(new binding_http_1.HttpClientFactory());
+servient.addClientFactory(new binding_coap_1.CoapClientFactory());
+const wotHelper = new core_1.Helpers(servient);
+wotHelper.fetch("https://localhost:8080/oauth").then((td) => {
     WoT.consume(td).then(async (thing) => {
         try {
-            const result = await (await thing.invokeAction("sayOk")).value();
+            const resp = await thing.invokeAction("sayOk");
+            const result = resp === null || resp === void 0 ? void 0 : resp.value();
             console.log("oAuth token was", result);
         } catch (error) {
             console.log("It seems that I couldn't access the resource");
diff --git a/examples/testthing/testclient.js b/examples/testthing/testclient.js
index 8c75c1140..4a25299ae 100644
--- a/examples/testthing/testclient.js
+++ b/examples/testthing/testclient.js
@@ -13,6 +13,14 @@
  * SPDX-License-Identifier: EPL-2.0 OR W3C-20150513
  ********************************************************************************/
 
+const core_1 = require("@node-wot/core");
+const binding_http_1 = require("@node-wot/binding-http");
+const binding_coap_1 = require("@node-wot/binding-coap");
+// create Servient and add HTTP/CoAP binding
+const servient = new core_1.Servient();
+servient.addClientFactory(new binding_http_1.HttpClientFactory());
+servient.addClientFactory(new binding_coap_1.CoapClientFactory());
+const wotHelper = new core_1.Helpers(servient);
 console.log = () => {
     /* empty */
 };
@@ -25,7 +33,11 @@ async function testPropertyRead(thing, name) {
         const value = await res.value();
         console.info("PASS " + name + " READ:", value);
     } catch (err) {
-        console.error("FAIL " + name + " READ:", err.message);
+        if (err instanceof Error) {
+            console.error("FAIL " + name + " READ:", err.message);
+        } else {
+            console.error("FAIL " + name + " READ:", err);
+        }
     }
 }
 async function testPropertyWrite(thing, name, value, shouldFail) {
@@ -35,11 +47,23 @@ async function testPropertyWrite(thing, name, value, shouldFail) {
         if (!shouldFail) console.info("PASS " + name + " WRITE (" + displayValue + ")");
         else console.error("FAIL " + name + " WRITE: (" + displayValue + ")");
     } catch (err) {
-        if (!shouldFail) console.error("FAIL " + name + " WRITE (" + displayValue + "):", err.message);
-        else console.info("PASS " + name + " WRITE (" + displayValue + "):", err.message);
+        if (!shouldFail) {
+            if (err instanceof Error) {
+                console.error("FAIL " + name + " WRITE (" + displayValue + "):", err.message);
+            } else {
+                console.error("FAIL " + name + " WRITE (" + displayValue + "):", err);
+            }
+        } else {
+            if (err instanceof Error) {
+                console.info("PASS " + name + " WRITE (" + displayValue + "):", err.message);
+            } else {
+                console.info("PASS " + name + " WRITE (" + displayValue + "):", err);
+            }
+        }
     }
 }
-WoTHelpers.fetch("http://localhost:8080/testthing")
+wotHelper
+    .fetch("http://localhost:8080/testthing")
     .then(async (td) => {
         // using await for serial execution (note 'async' in then() of fetch())
         try {