diff --git a/Server/controllers/monitorController.js b/Server/controllers/monitorController.js
index 5ee6d2c5d..c56e8851b 100644
--- a/Server/controllers/monitorController.js
+++ b/Server/controllers/monitorController.js
@@ -3,6 +3,7 @@ import {
 	getMonitorByIdQueryValidation,
 	getMonitorsByTeamIdValidation,
 	createMonitorBodyValidation,
+  getMonitorURLByQueryValidation,
 	editMonitorBodyValidation,
 	getMonitorsAndSummaryByTeamIdParamValidation,
 	getMonitorsAndSummaryByTeamIdQueryValidation,
@@ -273,6 +274,13 @@ const createMonitor = async (req, res, next) => {
  * @throws {Error} If there is an error during the process, especially if there is a validation error (422).
  */
 const checkEndpointResolution = async (req, res, next) => {
+  try {
+		await getMonitorURLByQueryValidation.validateAsync(req.query);
+	} catch (error) {
+		next(handleValidationError(error, SERVICE_NAME));
+		return;
+	}
+
   try {
     let { monitorURL } = req.query;
     monitorURL = new URL(monitorURL);
diff --git a/Server/openapi.json b/Server/openapi.json
index ff13498ea..aaa10a5d3 100644
--- a/Server/openapi.json
+++ b/Server/openapi.json
@@ -882,6 +882,16 @@
               }
             }
           },
+          "422": {
+            "description": "Unprocessable Content",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ErrorResponse"
+                }
+              }
+            }
+          },
           "500": {
             "description": "Internal Server Error",
             "content": {
diff --git a/Server/tests/controllers/monitorController.test.js b/Server/tests/controllers/monitorController.test.js
index 690649660..bd89b3dea 100644
--- a/Server/tests/controllers/monitorController.test.js
+++ b/Server/tests/controllers/monitorController.test.js
@@ -480,7 +480,7 @@ describe("Monitor Controllor - checkEndpointResolution", () => {
 		})).to.be.true;
 		expect(next.called).to.be.false;
 	});
-	it("should return a 400 error message if DNS resolution fails", async () => {
+	it("should return an error if DNS resolution fails", async () => {
 		const dnsError = new Error("DNS resolution failed");
 		dnsError.code = 'ENOTFOUND';
 		dnsResolveStub.callsFake((hostname, callback) => callback(dnsError));
@@ -491,13 +491,13 @@ describe("Monitor Controllor - checkEndpointResolution", () => {
 		expect(errorPassedToNext.message).to.include('DNS resolution failed');
 		expect(errorPassedToNext.code).to.equal('ENOTFOUND');
 	});
-	it('should call next with an error for invalid monitorURL', async () => {
+	it('should reject with an error if query validation fails', async () => {
 		req.query.monitorURL = 'invalid-url';
 		await checkEndpointResolution(req, res, next);
 		expect(next.calledOnce).to.be.true;
 		const error = next.getCall(0).args[0];
-		expect(error).to.be.an.instanceOf(TypeError);
-		expect(error.message).to.include('Invalid URL');
+		expect(next.firstCall.args[0]).to.be.an("error");
+		expect(next.firstCall.args[0].status).to.equal(422);
 	});
 });
 
diff --git a/Server/validation/joi.js b/Server/validation/joi.js
index 033650a3d..090cb3211 100644
--- a/Server/validation/joi.js
+++ b/Server/validation/joi.js
@@ -236,12 +236,16 @@ const pauseMonitorParamValidation = joi.object({
   monitorId: joi.string().required(),
 });
 
+const getMonitorURLByQueryValidation = joi.object({
+  monitorURL: joi.string().uri().required(),
+});
+
 //****************************************
 // Alerts
 //****************************************
 
 const createAlertParamValidation = joi.object({
-  monitorId: joi.string().required(),
+  monitorId: joi.string().uri().required(),
 });
 
 const createAlertBodyValidation = joi.object({
@@ -446,6 +450,7 @@ export {
   getCertificateParamValidation,
   editMonitorBodyValidation,
   pauseMonitorParamValidation,
+  getMonitorURLByQueryValidation,
   editUserParamValidation,
   editUserBodyValidation,
   createAlertParamValidation,