diff --git a/common/locales/en/api-v3.json b/common/locales/en/api-v3.json
index 73fbcca279..7e763f56e0 100644
--- a/common/locales/en/api-v3.json
+++ b/common/locales/en/api-v3.json
@@ -136,5 +136,6 @@
   "notAccteptedType": "Type must be in [eggs, hatchingPotions, food, quests, gear]",
   "contentKeyNotFound": "Key not found for Content <%= type %>",
   "plusOneGem": "+1 Gem",
-  "purchased": "You purchsed a <%= key %> <%= type %>"
+  "purchased": "You purchsed a <%= key %> <%= type %>",
+  "notAllowedHourglass": "Pet/Mount not available for purchase with Mystic Hourglass."
 }
diff --git a/common/locales/en/subscriber.json b/common/locales/en/subscriber.json
index 087213d679..0e9158e878 100644
--- a/common/locales/en/subscriber.json
+++ b/common/locales/en/subscriber.json
@@ -113,7 +113,7 @@
     "hourglassBuyItemConfirm": "Buy this item for 1 Mystic Hourglass?",
     "petsAlreadyOwned": "Pet already owned.",
     "mountsAlreadyOwned": "Mount already owned.",
-    "typeNotAllowedHourglass": "Item type not supported for purchase with Mystic Hourglass. Allowed types: ",
+    "typeNotAllowedHourglass": "Item type not supported for purchase with Mystic Hourglass. Allowed types: <%= allowedTypes %>",
     "petsNotAllowedHourglass": "Pet not available for purchase with Mystic Hourglass.",
     "mountsNotAllowedHourglass": "Mount not available for purchase with Mystic Hourglass.",
     "hourglassPurchase": "Purchased an item using a Mystic Hourglass!",
diff --git a/common/script/index.js b/common/script/index.js
index 8edc435cae..7d3bc21314 100644
--- a/common/script/index.js
+++ b/common/script/index.js
@@ -115,6 +115,7 @@ import equip from './ops/equip';
 import changeClass from './ops/changeClass';
 import disableClasses from './ops/disableClasses';
 import purchase from './ops/purchase';
+import purchaseHourglass from './ops/hourglassPurchase';
 
 api.ops = {
   scoreTask,
@@ -131,6 +132,7 @@ api.ops = {
   changeClass,
   disableClasses,
   purchase,
+  purchaseHourglass,
 };
 
 import handleTwoHanded from './fns/handleTwoHanded';
diff --git a/common/script/ops/hourglassPurchase.js b/common/script/ops/hourglassPurchase.js
index b97f581bb6..b627704d7b 100644
--- a/common/script/ops/hourglassPurchase.js
+++ b/common/script/ops/hourglassPurchase.js
@@ -3,53 +3,58 @@ import i18n from '../i18n';
 import _ from 'lodash';
 import splitWhitespace from '../libs/splitWhitespace';
 import pickDeep from '../libs/pickDeep';
+import {
+  BadRequest,
+  NotAuthorized,
+} from '../libs/errors';
+
+module.exports = function purchaseHourglass (user, req = {}, analytics) {
+  let key = _.get(req, 'params.key');
+  if (!key) throw new BadRequest(i18n.t('missingKeyParam', req.language));
+
+  let type = _.get(req, 'params.type');
+  if (!type) throw new BadRequest(i18n.t('missingTypeParam', req.language));
 
-module.exports = function(user, req, cb, analytics) {
-  var analyticsData, key, ref, type;
-  ref = req.params, type = ref.type, key = ref.key;
   if (!content.timeTravelStable[type]) {
-    return typeof cb === "function" ? cb({
-      code: 403,
-      message: i18n.t('typeNotAllowedHourglass', req.language) + JSON.stringify(_.keys(content.timeTravelStable))
-    }) : void 0;
+    throw new NotAuthorized(i18n.t('typeNotAllowedHourglass', {allowedTypes: _.keys(content.timeTravelStable).toString()}, req.language));
   }
+
   if (!_.contains(_.keys(content.timeTravelStable[type]), key)) {
-    return typeof cb === "function" ? cb({
-      code: 403,
-      message: i18n.t(type + 'NotAllowedHourglass', req.language)
-    }) : void 0;
+    throw new NotAuthorized(i18n.t('notAllowedHourglass', req.language));
   }
+
   if (user.items[type][key]) {
-    return typeof cb === "function" ? cb({
-      code: 403,
-      message: i18n.t(type + 'AlreadyOwned', req.language)
-    }) : void 0;
+    throw new NotAuthorized(i18n.t(`${type}AlreadyOwned`, req.language));
   }
-  if (!(user.purchased.plan.consecutive.trinkets > 0)) {
-    return typeof cb === "function" ? cb({
-      code: 403,
-      message: i18n.t('notEnoughHourglasses', req.language)
-    }) : void 0;
+
+  if (user.purchased.plan.consecutive.trinkets <= 0) {
+    throw new NotAuthorized(i18n.t('notEnoughHourglasses', req.language));
   }
+
   user.purchased.plan.consecutive.trinkets--;
+
   if (type === 'pets') {
     user.items.pets[key] = 5;
   }
+
   if (type === 'mounts') {
     user.items.mounts[key] = true;
   }
-  analyticsData = {
-    uuid: user._id,
-    itemKey: key,
-    itemType: type,
-    acquireMethod: 'Hourglass',
-    category: 'behavior'
-  };
-  if (analytics != null) {
-    analytics.track('acquire item', analyticsData);
+
+  if (analytics) {
+    analytics.track('acquire item', {
+      uuid: user._id,
+      itemKey: key,
+      itemType: type,
+      acquireMethod: 'Hourglass',
+      category: 'behavior',
+    });
   }
-  return typeof cb === "function" ? cb({
-    code: 200,
-    message: i18n.t('hourglassPurchase', req.language)
-  }, pickDeep(user, splitWhitespace('items purchased.plan.consecutive'))) : void 0;
+
+  let res = {
+    data: pickDeep(user, splitWhitespace('items purchased.plan.consecutive')),
+    message: i18n.t('hourglassPurchase', req.language),
+  };
+
+  return res;
 };
diff --git a/tasks/gulp-eslint.js b/tasks/gulp-eslint.js
index 6208dfbeb5..d00294b83c 100644
--- a/tasks/gulp-eslint.js
+++ b/tasks/gulp-eslint.js
@@ -28,7 +28,6 @@ const COMMON_FILES = [
   '!./common/script/ops/deleteWebhook.js',
   '!./common/script/ops/getTag.js',
   '!./common/script/ops/getTags.js',
-  '!./common/script/ops/hourglassPurchase.js',
   '!./common/script/ops/openMysteryItem.js',
   '!./common/script/ops/readCard.js',
   '!./common/script/ops/rebirth.js',
diff --git a/test/api/v3/integration/user/POST-user_purchase_hourglass.test.js b/test/api/v3/integration/user/POST-user_purchase_hourglass.test.js
new file mode 100644
index 0000000000..cd43334d00
--- /dev/null
+++ b/test/api/v3/integration/user/POST-user_purchase_hourglass.test.js
@@ -0,0 +1,25 @@
+import {
+  generateUser,
+  translate as t,
+} from '../../../../helpers/api-integration/v3';
+
+describe('POST /user/purchase-hourglass/:type/:key', () => {
+  let user;
+
+  beforeEach(async () => {
+    user = await generateUser({
+      'purchased.plan.consecutive.trinkets': 2,
+    });
+  });
+
+  // More tests in common code unit tests
+
+  it('buys a hourglass pet', async () => {
+    let response = await user.post('/user/purchase-hourglass/pets/MantisShrimp-Base');
+    await user.sync();
+
+    expect(response.message).to.eql(t('hourglassPurchase'));
+    expect(user.purchased.plan.consecutive.trinkets).to.eql(1);
+    expect(user.items.pets).to.eql({'MantisShrimp-Base': 5});
+  });
+});
diff --git a/test/common/ops/hourglassPurchase.js b/test/common/ops/hourglassPurchase.js
new file mode 100644
index 0000000000..258e0c6f01
--- /dev/null
+++ b/test/common/ops/hourglassPurchase.js
@@ -0,0 +1,145 @@
+import hourglassPurchase from '../../../common/script/ops/hourglassPurchase';
+import {
+  BadRequest,
+  NotAuthorized,
+} from '../../../common/script/libs/errors';
+import i18n from '../../../common/script/i18n';
+import content from '../../../common/script/content/index';
+import {
+  generateUser,
+} from '../../helpers/common.helper';
+
+describe('user.ops.hourglassPurchase', () => {
+  let user;
+
+  beforeEach(() => {
+    user = generateUser();
+  });
+
+  context('failure conditions', () => {
+    it('return error when key is not provided', (done) => {
+      try {
+        hourglassPurchase(user, {params: {}});
+      } catch (err) {
+        expect(err).to.be.an.instanceof(BadRequest);
+        expect(err.message).to.eql(i18n.t('missingKeyParam'));
+        done();
+      }
+    });
+
+    it('returns error when type is not provided', (done) => {
+      try {
+        hourglassPurchase(user, {params: {key: 'Base'}});
+      } catch (err) {
+        expect(err).to.be.an.instanceof(BadRequest);
+        expect(err.message).to.eql(i18n.t('missingTypeParam'));
+        done();
+      }
+    });
+
+    it('returns error when inccorect type is provided', (done) => {
+      try {
+        hourglassPurchase(user, {params: {type: 'notAType', key: 'MantisShrimp-Base'}});
+      } catch (err) {
+        expect(err).to.be.an.instanceof(NotAuthorized);
+        expect(err.message).to.eql(i18n.t('typeNotAllowedHourglass', {allowedTypes: _.keys(content.timeTravelStable).toString()}));
+        done();
+      }
+    });
+
+    it('does not grant to pets without Mystic Hourglasses', (done) => {
+      try {
+        hourglassPurchase(user, {params: {type: 'pets', key: 'MantisShrimp-Base'}});
+      } catch (err) {
+        expect(err).to.be.an.instanceof(NotAuthorized);
+        expect(err.message).to.eql(i18n.t('notEnoughHourglasses'));
+        done();
+      }
+    });
+
+    it('does not grant to mounts without Mystic Hourglasses', (done) => {
+      try {
+        hourglassPurchase(user, {params: {type: 'mounts', key: 'MantisShrimp-Base'}});
+      } catch (err) {
+        expect(err).to.be.an.instanceof(NotAuthorized);
+        expect(err.message).to.eql(i18n.t('notEnoughHourglasses'));
+        done();
+      }
+    });
+
+    it('does not grant pet that is not part of the Time Travel Stable', (done) => {
+      user.purchased.plan.consecutive.trinkets = 1;
+
+      try {
+        hourglassPurchase(user, {params: {type: 'pets', key: 'Wolf-Veteran'}});
+      } catch (err) {
+        expect(err).to.be.an.instanceof(NotAuthorized);
+        expect(err.message).to.eql(i18n.t('notAllowedHourglass'));
+        done();
+      }
+    });
+
+    it('does not grant mount that is not part of the Time Travel Stable', (done) => {
+      user.purchased.plan.consecutive.trinkets = 1;
+
+      try {
+        hourglassPurchase(user, {params: {type: 'mounts', key: 'Orca-Base'}});
+      } catch (err) {
+        expect(err).to.be.an.instanceof(NotAuthorized);
+        expect(err.message).to.eql(i18n.t('notAllowedHourglass'));
+        done();
+      }
+    });
+
+    it('does not grant pet that has already been purchased', (done) => {
+      user.purchased.plan.consecutive.trinkets = 1;
+      user.items.pets = {
+        'MantisShrimp-Base': true,
+      };
+
+      try {
+        hourglassPurchase(user, {params: {type: 'pets', key: 'MantisShrimp-Base'}});
+      } catch (err) {
+        expect(err).to.be.an.instanceof(NotAuthorized);
+        expect(err.message).to.eql(i18n.t('petsAlreadyOwned'));
+        done();
+      }
+    });
+
+    it('does not grant mount that has already been purchased', (done) => {
+      user.purchased.plan.consecutive.trinkets = 1;
+      user.items.mounts = {
+        'MantisShrimp-Base': true,
+      };
+
+      try {
+        hourglassPurchase(user, {params: {type: 'mounts', key: 'MantisShrimp-Base'}});
+      } catch (err) {
+        expect(err).to.be.an.instanceof(NotAuthorized);
+        expect(err.message).to.eql(i18n.t('mountsAlreadyOwned'));
+        done();
+      }
+    });
+  });
+
+  context('successful purchases', () => {
+    it('buys a pet', () => {
+      user.purchased.plan.consecutive.trinkets = 2;
+
+      let response = hourglassPurchase(user, {params: {type: 'pets', key: 'MantisShrimp-Base'}});
+
+      expect(response.message).to.eql(i18n.t('hourglassPurchase'));
+      expect(user.purchased.plan.consecutive.trinkets).to.eql(1);
+      expect(user.items.pets).to.eql({'MantisShrimp-Base': 5});
+    });
+
+    it('buys a mount', () => {
+      user.purchased.plan.consecutive.trinkets = 2;
+
+      let response = hourglassPurchase(user, {params: {type: 'mounts', key: 'MantisShrimp-Base'}});
+      expect(response.message).to.eql(i18n.t('hourglassPurchase'));
+      expect(user.purchased.plan.consecutive.trinkets).to.eql(1);
+      expect(user.items.mounts).to.eql({'MantisShrimp-Base': true});
+    });
+  });
+});
diff --git a/website/src/controllers/api-v3/user.js b/website/src/controllers/api-v3/user.js
index 8dcf87cad9..904fcf34a2 100644
--- a/website/src/controllers/api-v3/user.js
+++ b/website/src/controllers/api-v3/user.js
@@ -699,4 +699,27 @@ api.purchase = {
   },
 };
 
+/**
+* @api {post} /user/purchase-hourglass/:type/:key Purchase Hourglass.
+* @apiVersion 3.0.0
+* @apiName UserPurchaseHourglass
+* @apiGroup User
+*
+* @apiParam {string} type {pets|mounts}. The type of item to purchase
+* @apiParam {string} key Ex: {MantisShrimp-Base}. The key for the mount/pet
+*
+* @apiSuccess {Object} data `items purchased.plan.consecutive`
+*/
+api.userPurchaseHourglass = {
+  method: 'POST',
+  middlewares: [authWithHeaders(), cron],
+  url: '/user/purchase-hourglass/:type/:key',
+  async handler (req, res) {
+    let user = res.locals.user;
+    let purchaseHourglassResponse = common.ops.purchaseHourglass(user, req, res.analytics);
+    await user.save();
+    res.respond(200, purchaseHourglassResponse);
+  },
+};
+
 module.exports = api;