diff --git a/test/api/v3/integration/groups/POST-groups_groupId_quests_invite.test.js b/test/api/v3/integration/groups/POST-groups_groupId_quests_invite.test.js
index 4311cf7911..973a51a1a5 100644
--- a/test/api/v3/integration/groups/POST-groups_groupId_quests_invite.test.js
+++ b/test/api/v3/integration/groups/POST-groups_groupId_quests_invite.test.js
@@ -1,6 +1,7 @@
 import {
   createAndPopulateGroup,
   translate as t,
+  sleep,
 } from '../../../../helpers/api-v3-integration.helper';
 import { v4 as generateUUID } from 'uuid';
 import { quests as questScrolls } from '../../../../../common/script/content';
@@ -122,8 +123,8 @@ describe('POST /groups/:groupId/quests/invite/:questKey', () => {
       ]);
     });
 
-    xit('adds quest details to group object', async () => {
-      await leader.post(`groups/${questingGroup._id}/quests/invite/${PET_QUEST}`);
+    it('adds quest details to group object', async () => {
+      await leader.post(`/groups/${questingGroup._id}/quests/invite/${PET_QUEST}`);
 
       await questingGroup.sync();
 
@@ -131,47 +132,61 @@ describe('POST /groups/:groupId/quests/invite/:questKey', () => {
 
       expect(quest.key).to.eql(PET_QUEST);
       expect(quest.active).to.eql(false);
-      expect(quest.leader).to.eql(false);
-      expect(quest.members).to.have.property(leader._id, null);
+      expect(quest.leader).to.eql(leader._id);
+      expect(quest.members).to.have.property(leader._id, true);
       expect(quest.members).to.have.property(member._id, null);
       expect(quest).to.have.property('progress');
     });
 
-    xit('adds quest details to user objects', async () => {
-      await leader.post(`groups/${questingGroup._id}/quests/invite/${PET_QUEST}`);
+    it('adds quest details to user objects', async () => {
+      await leader.post(`/groups/${questingGroup._id}/quests/invite/${PET_QUEST}`);
+
+      await sleep(0.1); // member updates happen in the background
 
       await Promise.all([
         leader.sync(),
         member.sync(),
       ]);
 
-      [leader, member].forEach((user) => {
-        let quest = user.party.quest;
-
-        expect(quest.key).to.eql(PET_QUEST);
-        expect(quest.active).to.eql(false);
-        expect(quest.leader).to.eql(false);
-        expect(quest.members).to.have.property(leader._id, null);
-        expect(quest.members).to.have.property(member._id, null);
-        expect(quest).to.have.property('progress');
-      });
+      expect(leader.party.quest.key).to.eql(PET_QUEST);
+      expect(member.party.quest.key).to.eql(PET_QUEST);
+      expect(leader.party.quest.RSVPNeeded).to.eql(false);
+      expect(member.party.quest.RSVPNeeded).to.eql(true);
     });
 
-    xit('sends back the quest object', async () => {
-      let inviteResponse = await leader.post(`groups/${questingGroup._id}/quests/invite/${PET_QUEST}`);
+    it('sends back the quest object', async () => {
+      let inviteResponse = await leader.post(`/groups/${questingGroup._id}/quests/invite/${PET_QUEST}`);
 
       expect(inviteResponse.key).to.eql(PET_QUEST);
       expect(inviteResponse.active).to.eql(false);
-      expect(inviteResponse.leader).to.eql(false);
-      expect(inviteResponse.members).to.have.property(leader._id, null);
+      expect(inviteResponse.leader).to.eql(leader._id);
+      expect(inviteResponse.members).to.have.property(leader._id, true);
       expect(inviteResponse.members).to.have.property(member._id, null);
       expect(inviteResponse).to.have.property('progress');
     });
 
-    xit('allows non-leader party members to send invites', async () => {
-      let inviteResponse = await member.post(`groups/${questingGroup._id}/quests/invite/${PET_QUEST}`);
+    it('allows non-party-leader party members to send invites', async () => {
+      let inviteResponse = await member.post(`/groups/${questingGroup._id}/quests/invite/${PET_QUEST}`);
+
+      await questingGroup.sync();
 
       expect(inviteResponse.key).to.eql(PET_QUEST);
+      expect(questingGroup.quest.key).to.eql(PET_QUEST);
+    });
+
+    it('starts quest automatically if user is in a solo party', async () => {
+      let leaderDetails = { balance: 10 };
+      leaderDetails[`items.quests.${PET_QUEST}`] = 1;
+      let { group, groupLeader } = await createAndPopulateGroup({
+        groupDetails: { type: 'party', privacy: 'private' },
+        leaderDetails,
+      });
+
+      await groupLeader.post(`/groups/${group._id}/quests/invite/${PET_QUEST}`);
+
+      await group.sync();
+
+      expect(group.quest.active).to.eql(true);
     });
   });
 });
diff --git a/website/src/controllers/api-v3/quests.js b/website/src/controllers/api-v3/quests.js
index 38020fcae5..77cec58d6a 100644
--- a/website/src/controllers/api-v3/quests.js
+++ b/website/src/controllers/api-v3/quests.js
@@ -1,14 +1,25 @@
+import _ from 'lodash';
+import Q from 'q';
 import { authWithHeaders } from '../../middlewares/api-v3/auth';
 import cron from '../../middlewares/api-v3/cron';
 import {
   model as Group,
 } from '../../models/group';
+import {
+  model as User,
+} from '../../models/user';
 import {
   NotFound,
   NotAuthorized,
 } from '../../libs/api-v3/errors';
 import { quests as questScrolls } from '../../../../common/script/content';
 
+function canStartQuestAutomatically (group)  {
+  // If all members are either true (accepted) or false (rejected) return true
+  // If any member is null/undefined (undecided) return false
+  return _.every(group.quest.members, Boolean);
+}
+
 let api = {};
 
 /**
@@ -44,24 +55,43 @@ api.inviteToQuest = {
     if (user.stats.lvl < quest.lvl) throw new NotAuthorized(res.t('questLevelTooHigh', { level: quest.lvl }));
     if (group.quest.key) throw new NotAuthorized(res.t('questAlreadyUnderway'));
 
+    let members = await User.find({ 'party._id': group._id }, 'auth.facebook auth.local preferences.emailNotifications').exec();
+    let backgroundOperations = [];
+
     group.markModified('quest');
     group.quest.key = questKey;
     group.quest.leader = user._id;
     group.quest.members = {};
+    group.quest.members[user._id] = true;
 
-    // let memberUpdate = {
-    //   '$set': {
-    //     'party.quest.key': questKey,
-    //     'party.quest.progress.down': 0,
-    //     'party.quest.completed': null,
-    //   },
-    // };
+    user.party.quest.RSVPNeeded = false;
+    user.party.quest.key = questKey;
 
-    // TODO collect members of party
-    // TODO Logic for quest invite and send back quest object
+    _.each(members, (member) => {
+      if (member._id !== user._id) {
+        group.quest.members[member._id] = null;
+        member.party.quest.RSVPNeeded = true;
+        member.party.quest.key = questKey;
+        // TODO: Send Quest invite email
+        backgroundOperations.push(member.save());
+      }
+    });
 
-    await group.save();
-    res.respond(200, {});
+    if (canStartQuestAutomatically(group)) {
+      group.startQuest(user);
+    }
+
+    let [savedGroup] = await Q.all([
+      group.save(),
+      user.save(),
+    ]);
+
+    res.respond(200, savedGroup.quest);
+
+    Q.allSettled(backgroundOperations).catch(err => {
+      // TODO what to do about errors in background ops
+      throw err;
+    });
   },
 };