diff --git a/.github/workflows/check_code_quality.yml b/.github/workflows/check_code_quality.yml
index df156f2117..e529109c04 100644
--- a/.github/workflows/check_code_quality.yml
+++ b/.github/workflows/check_code_quality.yml
@@ -35,8 +35,11 @@ jobs:
     - name: Check linting
       run: npm run lint:check
 
+    - name: Test webhook URL validation and persistence
+      run: npm run test:webhook
+
     - name: Generate Prisma client
       run: npm run db:generate
 
     - name: Check build
-      run: npm run build
\ No newline at end of file
+      run: npm run build
diff --git a/package.json b/package.json
index 56e32fcc8a..c258ae1f36 100644
--- a/package.json
+++ b/package.json
@@ -10,6 +10,7 @@
     "start:prod": "node dist/main",
     "dev:server": "tsx watch ./src/main.ts",
     "test": "tsx watch ./test/all.test.ts",
+    "test:webhook": "tsx --test src/api/integrations/event/webhook/webhook.url.test.ts",
     "lint": "eslint --fix --ext .ts src",
     "lint:check": "eslint --ext .ts src",
     "commit": "cz",
diff --git a/src/api/integrations/event/webhook/webhook.controller.ts b/src/api/integrations/event/webhook/webhook.controller.ts
index 7f1dd8dc0e..3219ab08ad 100644
--- a/src/api/integrations/event/webhook/webhook.controller.ts
+++ b/src/api/integrations/event/webhook/webhook.controller.ts
@@ -4,11 +4,11 @@ import { WAMonitoringService } from '@api/services/monitor.service';
 import { wa } from '@api/types/wa.types';
 import { configService, Log, Webhook } from '@config/env.config';
 import { Logger } from '@config/logger.config';
-// import { BadRequestException } from '@exceptions';
 import axios, { AxiosInstance } from 'axios';
 import * as jwt from 'jsonwebtoken';
 
 import { EmitData, EventController, EventControllerInterface } from '../event.controller';
+import { persistedWebhookUrl } from './webhook.url';
 
 export class WebhookController extends EventController implements EventControllerInterface {
   private readonly logger = new Logger('WebhookController');
@@ -18,9 +18,7 @@ export class WebhookController extends EventController implements EventControlle
   }
 
   override async set(instanceName: string, data: EventDto): Promise<wa.LocalWebHook> {
-    // if (!/^(https?:\/\/)/.test(data.webhook.url)) {
-    //   throw new BadRequestException('Invalid "url" property');
-    // }
+    const url = persistedWebhookUrl(data.webhook?.url);
 
     if (!data.webhook?.enabled) {
       data.webhook.events = [];
@@ -37,7 +35,7 @@ export class WebhookController extends EventController implements EventControlle
       update: {
         enabled: data.webhook?.enabled,
         events: data.webhook?.events,
-        url: data.webhook?.url,
+        url,
         headers: data.webhook?.headers,
         webhookBase64: data.webhook.base64,
         webhookByEvents: data.webhook.byEvents,
@@ -46,7 +44,7 @@ export class WebhookController extends EventController implements EventControlle
         enabled: data.webhook?.enabled,
         events: data.webhook?.events,
         instanceId: this.monitor.waInstances[instanceName].instanceId,
-        url: data.webhook?.url,
+        url,
         headers: data.webhook?.headers,
         webhookBase64: data.webhook.base64,
         webhookByEvents: data.webhook.byEvents,
diff --git a/src/api/integrations/event/webhook/webhook.schema.ts b/src/api/integrations/event/webhook/webhook.schema.ts
index 5d0f3724d6..7b1bcbf88a 100644
--- a/src/api/integrations/event/webhook/webhook.schema.ts
+++ b/src/api/integrations/event/webhook/webhook.schema.ts
@@ -2,6 +2,7 @@ import { JSONSchema7 } from 'json-schema';
 import { v4 } from 'uuid';
 
 import { EventController } from '../event.controller';
+import { webhookUrlSchema } from './webhook.url';
 
 const isNotEmpty = (...propertyNames: string[]): JSONSchema7 => {
   const properties = {};
@@ -30,7 +31,7 @@ export const webhookSchema: JSONSchema7 = {
       type: 'object',
       properties: {
         enabled: { type: 'boolean' },
-        url: { type: 'string' },
+        url: webhookUrlSchema,
         headers: { type: 'object' },
         byEvents: { type: 'boolean' },
         base64: { type: 'boolean' },
diff --git a/src/api/integrations/event/webhook/webhook.url.test.ts b/src/api/integrations/event/webhook/webhook.url.test.ts
new file mode 100644
index 0000000000..36e9bb46ab
--- /dev/null
+++ b/src/api/integrations/event/webhook/webhook.url.test.ts
@@ -0,0 +1,91 @@
+import assert from 'node:assert/strict';
+import { mock, test } from 'node:test';
+
+import type { PrismaRepository } from '@api/repository/repository.service';
+import type { WAMonitoringService } from '@api/services/monitor.service';
+import type { Prisma } from '@prisma/client';
+import { instanceSchema } from '@validate/instance.schema';
+import { validate } from 'jsonschema';
+
+import { WebhookController } from './webhook.controller';
+import { webhookSchema } from './webhook.schema';
+
+const validUrls = [
+  'https://example.com/hook',
+  'http://localhost:8080/hook',
+  'https://[::1]:8443/hook?token=abc',
+  'HTTPS://example.com/hook',
+  'hTtPs://example.com/hook',
+];
+
+const invalidUrls = [
+  '  https://example.com/hook  ',
+  'ftp://example.com/hook',
+  'https://',
+  'https://?token=abc',
+  'https://#fragment',
+  'https:///hook',
+  'https://example.com:invalid/hook',
+  'https://[invalid]/hook',
+  'https://example.com/hook with spaces',
+  'https://example.com/hook\n',
+  'https://example.com/hook\r\n',
+];
+
+for (const [name, schema] of [
+  ['webhook settings', webhookSchema],
+  ['instance creation', instanceSchema],
+] as const) {
+  test(`${name} accepts valid HTTP(S) URLs`, () => {
+    for (const url of validUrls) {
+      assert.equal(validate({ webhook: { enabled: true, url } }, schema).valid, true, url);
+    }
+  });
+
+  test(`${name} rejects invalid webhook URLs`, () => {
+    for (const url of invalidUrls) {
+      assert.equal(validate({ webhook: { enabled: true, url } }, schema).valid, false, JSON.stringify(url));
+    }
+  });
+}
+
+test('instance creation only requires a URL when webhook settings are supplied', () => {
+  assert.equal(validate({ instanceName: 'test-instance' }, instanceSchema).valid, true);
+  assert.equal(validate({ instanceName: 'test-instance', webhook: {} }, instanceSchema).valid, false);
+});
+
+test('controller persists trimmed URLs on both create and update', async () => {
+  const upsert = mock.fn(async (args: Prisma.WebhookUpsertArgs) => args.create);
+  const prisma = { webhook: { upsert } } as unknown as PrismaRepository;
+  const monitor = {
+    waInstances: { 'test-instance': { instanceId: 'test-instance-id' } },
+  } as unknown as WAMonitoringService;
+  const controller = new WebhookController(prisma, monitor);
+
+  await controller.set('test-instance', {
+    webhook: { enabled: true, events: [], url: '  HTTPS://example.com/hook  ' },
+  });
+
+  assert.equal(upsert.mock.callCount(), 1);
+  const persisted = upsert.mock.calls[0].arguments[0];
+  assert.equal(persisted.where.instanceId, 'test-instance-id');
+  assert.equal(persisted.create.url, 'https://example.com/hook');
+  assert.equal(persisted.update.url, 'https://example.com/hook');
+});
+
+test('controller rejects malformed URLs before persistence', async () => {
+  const upsert = mock.fn();
+  const controller = new WebhookController(
+    { webhook: { upsert } } as unknown as PrismaRepository,
+    {} as WAMonitoringService,
+  );
+
+  for (const url of ['https://?', 'https://example.com:invalid/hook', 'https://[invalid]/hook', 'ftp://example.com']) {
+    await assert.rejects(controller.set('test-instance', { webhook: { enabled: true, events: [], url } }), {
+      status: 400,
+      error: 'Bad Request',
+      message: ['The "url" must be a valid http or https URL'],
+    });
+  }
+  assert.equal(upsert.mock.callCount(), 0);
+});
diff --git a/src/api/integrations/event/webhook/webhook.url.ts b/src/api/integrations/event/webhook/webhook.url.ts
new file mode 100644
index 0000000000..7d97259130
--- /dev/null
+++ b/src/api/integrations/event/webhook/webhook.url.ts
@@ -0,0 +1,36 @@
+import type { JSONSchema7 } from 'json-schema';
+import { Validator } from 'jsonschema';
+
+export const WEBHOOK_HTTP_URL_PATTERN = '^[hH][tT][tT][pP][sS]?://[^\\s/?#]+\\S*(?![\\s\\S])';
+
+const webhookUrlPattern = new RegExp(WEBHOOK_HTTP_URL_PATTERN);
+
+function isWebhookUrl(url: unknown): boolean {
+  return typeof url === 'string' && webhookUrlPattern.test(url) && URL.canParse(url);
+}
+
+Validator.prototype.customFormats['webhook-url'] = isWebhookUrl;
+
+export const webhookUrlSchema: JSONSchema7 = {
+  type: 'string',
+  format: 'webhook-url',
+  pattern: WEBHOOK_HTTP_URL_PATTERN,
+  description: 'The "url" must be a valid http or https URL without whitespace',
+};
+
+export function persistedWebhookUrl(url: string | undefined): string | undefined {
+  if (typeof url !== 'string') {
+    return url;
+  }
+
+  const trimmedUrl = url.trim();
+  if (!isWebhookUrl(trimmedUrl)) {
+    throw {
+      status: 400,
+      error: 'Bad Request',
+      message: ['The "url" must be a valid http or https URL'],
+    };
+  }
+
+  return trimmedUrl.replace(/^https?:/i, (scheme) => scheme.toLowerCase());
+}
diff --git a/src/validate/instance.schema.ts b/src/validate/instance.schema.ts
index a0553b6667..f00f7486ae 100644
--- a/src/validate/instance.schema.ts
+++ b/src/validate/instance.schema.ts
@@ -1,3 +1,4 @@
+import { webhookUrlSchema } from '@api/integrations/event/webhook/webhook.url';
 import { Integration } from '@api/types/wa.types';
 import { JSONSchema7 } from 'json-schema';
 import { v4 } from 'uuid';
@@ -51,6 +52,11 @@ export const instanceSchema: JSONSchema7 = {
     proxyUsername: { type: 'string' },
     proxyPassword: { type: 'string' },
     // Webhook
+    webhook: {
+      type: 'object',
+      properties: { url: webhookUrlSchema },
+      required: ['url'],
+    },
     webhookUrl: { type: 'string' },
     webhookByEvents: { type: 'boolean' },
     webhookBase64: { type: 'boolean' },