diff --git a/ghost/members-api/lib/repositories/event.js b/ghost/members-api/lib/repositories/event.js
index 11a90e5228..c9a34b2830 100644
--- a/ghost/members-api/lib/repositories/event.js
+++ b/ghost/members-api/lib/repositories/event.js
@@ -36,6 +36,9 @@ module.exports = class EventRepository {
         if (filters['data.created_at']) {
             options.filter.push(filters['data.created_at'].replace(/data.created_at:/g, 'created_at:'));
         }
+        if (filters['data.source']) {
+            options.filter.push(filters['data.source'].replace(/data.source:/g, 'source:'));
+        }
         if (filters['data.member_id']) {
             options.filter.push(filters['data.member_id'].replace(/data.member_id:/g, 'member_id:'));
         }
diff --git a/ghost/verification-trigger/lib/verification-trigger.js b/ghost/verification-trigger/lib/verification-trigger.js
index 1a3e5824d8..d9c50d42d4 100644
--- a/ghost/verification-trigger/lib/verification-trigger.js
+++ b/ghost/verification-trigger/lib/verification-trigger.js
@@ -1,4 +1,6 @@
 const errors = require('@tryghost/errors');
+const DomainEvents = require('@tryghost/domain-events');
+const {MemberSubscribeEvent} = require('@tryghost/member-events');
 
 const messages = {
     emailVerificationNeeded: `We're hard at work processing your import. To make sure you get great deliverability on a list of that size, we'll need to enable some extra features for your account. A member of our team will be in touch with you by email to review your account make sure everything is configured correctly so you're ready to go.`,
@@ -34,6 +36,24 @@ class VerificationTrigger {
         this._membersStats = membersStats;
         this._Settings = Settings;
         this._eventRepository = eventRepository;
+
+        DomainEvents.subscribe(MemberSubscribeEvent, async (event) => {
+            if (event.data.source === 'api' && isFinite(this._configThreshold)) {
+                const createdAt = new Date();
+                createdAt.setDate(createdAt.getDate() - 30);
+                const events = await this._eventRepository.getNewsletterSubscriptionEvents({}, {
+                    'data.source': 'data.source:api',
+                    'data.created_at': `data.created_at:>${createdAt.toISOString().replace('T', ' ').substring(0, 19)}`
+                });
+
+                if (events.meta.pagination.total > this._configThreshold) {
+                    await this.startVerificationProcess({
+                        amountImported: events.meta.pagination.total,
+                        throwOnTrigger: false
+                    });
+                }
+            }
+        });
     }
 
     async getImportThreshold() {
diff --git a/ghost/verification-trigger/test/verification-trigger.test.js b/ghost/verification-trigger/test/verification-trigger.test.js
index 8e37bf170e..5c568cb88b 100644
--- a/ghost/verification-trigger/test/verification-trigger.test.js
+++ b/ghost/verification-trigger/test/verification-trigger.test.js
@@ -3,6 +3,8 @@
 const sinon = require('sinon');
 require('./utils');
 const VerificationTrigger = require('../lib/verification-trigger');
+const DomainEvents = require('@tryghost/domain-events');
+const {MemberSubscribeEvent} = require('@tryghost/member-events');
 
 describe('Import threshold', function () {
     it('Creates a threshold based on config', async function () {
@@ -152,4 +154,40 @@ describe('Email verification flow', function () {
             amountImported: 10
         });
     });
-});
+
+    it('Triggers when a number of API events are dispatched', async function () {
+        const emailStub = sinon.stub().resolves(null);
+        const settingsStub = sinon.stub().resolves(null);
+        const eventStub = sinon.stub().resolves({
+            meta: {
+                pagination: {
+                    total: 10
+                }
+            }
+        });
+        
+        new VerificationTrigger({
+            configThreshold: 2,
+            Settings: {
+                edit: settingsStub
+            },
+            isVerified: () => false,
+            isVerificationRequired: () => false,
+            sendVerificationEmail: emailStub,
+            eventRepository: {
+                getNewsletterSubscriptionEvents: eventStub
+            }
+        });
+
+        DomainEvents.dispatch(MemberSubscribeEvent.create({
+            memberId: 'hello!',
+            source: 'api'
+        }, new Date()));
+
+        eventStub.callCount.should.eql(1);
+        eventStub.lastCall.lastArg.should.have.property('data.source');
+        eventStub.lastCall.lastArg.should.have.property('data.created_at');
+        eventStub.lastCall.lastArg['data.source'].should.eql('data.source:api');
+        eventStub.lastCall.lastArg['data.created_at'].should.startWith('data.created_at:>');
+    });
+});
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