diff --git a/test/api/v3/integration/webhook/POST-user_add_webhook.test.js b/test/api/v3/integration/webhook/POST-user_add_webhook.test.js
index 50187515b8..accb834dc4 100644
--- a/test/api/v3/integration/webhook/POST-user_add_webhook.test.js
+++ b/test/api/v3/integration/webhook/POST-user_add_webhook.test.js
@@ -100,6 +100,16 @@ describe('POST /user/webhook', () => {
     expect(webhook.url).to.eql(body.url);
   });
 
+  it('cannot use an id of a webhook that already exists', async () => {
+    await user.post('/user/webhook', body);
+
+    await expect(user.post('/user/webhook', body)).to.eventually.be.rejected.and.eql({
+      code: 400,
+      error: 'BadRequest',
+      message: t('webhookIdAlreadyTaken', { id: body.id }),
+    });
+  });
+
   it('defaults taskActivity options', async () => {
     body.type = 'taskActivity';
 
diff --git a/website/common/locales/en/settings.json b/website/common/locales/en/settings.json
index 5fa2d2c072..f3b98657c0 100644
--- a/website/common/locales/en/settings.json
+++ b/website/common/locales/en/settings.json
@@ -159,6 +159,7 @@
     "missingWebhookId": "The webhook's id is required.",
     "invalidWebhookType": "\"<%= type %>\" is not a valid value for the parameter \"type\".",
     "webhookBooleanOption": "\"<%= option %>\" must be a Boolean value.",
+    "webhookIdAlreadyTaken": "A webhook with the id <%= id %> already exists.",
     "noWebhookWithId": "There is no webhook with the id <%= id %>.",
     "regIdRequired": "RegId is required",
     "invalidPushClient": "Invalid client. Only Official Habitica clients can receive push notifications.",
diff --git a/website/server/controllers/api-v3/webhook.js b/website/server/controllers/api-v3/webhook.js
index 4c6baaf0eb..4c51140285 100644
--- a/website/server/controllers/api-v3/webhook.js
+++ b/website/server/controllers/api-v3/webhook.js
@@ -1,7 +1,7 @@
 import { authWithHeaders } from '../../middlewares/auth';
 import { model as Webhook } from '../../models/webhook';
 import { removeFromArray } from '../../libs/collectionManipulators';
-import { NotFound } from '../../libs/errors';
+import { NotFound, BadRequest } from '../../libs/errors';
 
 let api = {};
 
@@ -53,6 +53,7 @@ let api = {};
 * @apiSuccess {Object} data.options The options for the webhook (See examples)
 *
 * @apiError InvalidUUID The `id` was not a valid `UUID`
+* @apiError IdTaken The `id` is already being used by another webhook
 * @apiError InvalidEnable The `enable` param was not a `Boolean` value
 * @apiError InvalidUrl The `url` param was not valid url
 * @apiError InvalidWebhookType The `type` param was not a supported Webhook type
@@ -67,6 +68,14 @@ api.addWebhook = {
     let user = res.locals.user;
     let webhook = new Webhook(req.body);
 
+    let existingWebhook = user.webhooks.find((wh) => {
+      return wh.id === webhook.id;
+    });
+
+    if (existingWebhook) {
+      throw new BadRequest(res.t('webhookIdAlreadyTaken', { id: webhook.id }));
+    }
+
     webhook.formatOptions(res);
 
     user.webhooks.push(webhook);