MailerLite Classic

MailerLite Classic

#199 most-used

Grow your list, send campaigns, nurture subscribers

MarketingEmailAutomationEmail MarketingLead Generation

MailerLite Classic is the email marketing platform trusted by small businesses and creators to build and manage subscriber lists, send targeted campaigns, and nurture leads through automated sequences. Connect it to Actionist and your agents can create or update subscribers, remove contacts from groups, track campaign activity, respond to unsubscribes and bounces, and keep your CRM in sync with your mailing list — all without logging into MailerLite manually.

Average time saved
10 hours
per person · per month
≈ 1 workdays back

Eliminates manual work. Agents eliminate the manual cycle of exporting leads, importing subscribers, updating subscriber groups across deal stage changes, pulling campaign statistics into spreadsheets, and processing opt-out requests across multiple systems.

Schedule

What your MailerLite Classic agent runs on autopilot

A week of scheduled jobs your Actionist agent will execute on your behalf.

28Scheduled jobs
7Agents at work
24/7Always on
Agents
Wed–Fri
Wed
Thu
Fri
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
Multi-app workflows

MailerLite Classic × every other app you use

End-to-end automations that span multiple apps — each one a real business outcome.

6Workflows
5Apps spanned
~13 hrsSaved / week
5Personas served
For marketing
Featured4 apps

New subscriber synced to CRM on sign-up

When a visitor submits a MailerLite Classic webform, the agent fetches their subscriber details, creates a contact in HubSpot with the lead source tagged, appends a row to the lead tracker in Google Sheets, and posts a new-lead notification to the #leads Slack channel. Every sign-up is in the CRM and visible to the team within about a minute.

~3 hrs

Time saved for your team — every week, on autopilot

The flow
Trigger·When a new subscriber signs up via a MailerLite Classic webform
Result
Create or update contact in HubSpot with subscriber data and lead sourceAppend subscriber to the lead tracking sheet with timestamp and groupPost new lead notification to the #leads Slack channel
The win
Saved per run
5 min
Runs / week
~40×
Every web sign-up reaches the CRM and Slack without manual action
Driven byMarketing Agent
ROI

Savings

What your team gets back — two angles: what you stop doing manually, and what that's worth.

Without Actionist

What you do manually today

With Actionist

What your agent runs for you

  • Sales
    40 min / week
    Manual CRM-to-list syncs

    Sales reps manually export leads from the CRM, import them into MailerLite Classic, and assign groups — a process repeated every time a deal stage changes.

    Sales Agent
    0 min
    Agent keeps CRM and email list in sync automatically

    When a deal stage changes, the agent updates the subscriber's group in MailerLite Classic within about a minute — no exports, no imports, no manual group assignments.

  • Marketing
    30 min / week
    Manual campaign stats retrieval

    Marketers log into MailerLite Classic after each send, copy open rates and click rates manually into a spreadsheet, and share updates via email.

    Marketing Agent
    0 min
    Agent posts campaign stats to Slack and Sheets after every send

    After each campaign send, the agent fetches performance data and posts it to the Slack channel and appends it to the Google Sheets dashboard within about a minute.

  • Customer Support
    25 min / week
    Manual opt-out propagation

    When a subscriber opts out, the support team manually updates the CRM, adds the address to the suppression list, and logs the action in the compliance tracker — three separate manual steps per opt-out.

    Customer Support Agent
    0 min
    Agent propagates opt-outs to CRM and compliance log automatically

    When a subscriber unsubscribes, the agent updates the CRM, appends the address to the suppression list, and logs the action in the compliance tracker within about a minute.

  • Human Resources
    20 min / week
    Manual new-hire list entry

    HR manually adds each new hire's email to MailerLite Classic, selects the onboarding group, and confirms the welcome sequence is active — a task easily forgotten during busy hiring periods.

    Human Resources Agent
    0 min
    Agent adds new hires to onboarding group automatically on HRIS entry

    When a new hire appears in the HRIS, the agent creates their MailerLite Classic subscriber record and adds them to the onboarding group within about a minute — the welcome sequence starts before HR even closes the record.

  • Finance
    10 min / week
    Manual plan usage monitoring

    Finance checks the MailerLite Classic account page monthly to verify subscriber counts, often discovering plan overages only after the billing cycle has closed.

    Finance Agent
    0 min
    Agent monitors plan usage and alerts before overages occur

    Every Friday, the agent checks the subscriber count against the plan limit and sends a proactive Slack alert if the account is approaching 80% of its cap — no surprise billing events.

  • Operations
    60 min / week
    Manual list hygiene checks

    Operations manually reviews subscriber groups monthly to find empty or stale segments, check webform connections, and confirm automation sequences are still active — a process that takes several hours.

    Operations Agent
    0 min
    Agent audits list health and webforms automatically each week

    Every week, the agent checks all subscriber group sizes, confirms webforms point to valid groups, and verifies automation sequences are running — posting a Slack summary with any issues found.

  • Legal
    20 min / week
    Manual GDPR opt-out processing

    The legal team manually processes each GDPR removal request, logs the action in the compliance tracker, and verifies the contact is now unsubscribed in MailerLite Classic — one by one.

    Legal Agent
    0 min
    Agent processes GDPR requests and logs compliance evidence automatically

    When a GDPR removal request arrives, the agent unsubscribes the contact in MailerLite Classic and logs the action in the compliance tracker within about a minute, with the request reference and timestamp.

+ 100s of other MailerLite Classic automations
Average time saved
21 hrs / person / month
Calculator

Calculate what your team saves

Team size
8 people
Hourly rate
$22 / hr
Hours saved / week
20
Hours saved / year
1,000
Annual ROI
$22,000

Based on MailerLite Classic's typical team usage — the visible tasks plus a few other automations the agent runs: ~2.5 hrs / person / week of admin work automated.

Connect

How to plug MailerLite Classic into Actionist

Pick the connection method that suits your environment.

Connect MailerLite Classic using your account's API key. Generate one from the Integrations → Developer API section of your MailerLite Classic account settings.

1
Open Developer API settings

Log into your MailerLite Classic account. In the left sidebar, go to Integrations → Developer API.

2
Copy your API Key

Your API key is displayed on the Developer API page. Copy it and treat it like a password — store it securely, not in plain text.

3
Paste into Actionist

Paste the API key into the field below and click Test Connection. Actionist will verify the key with a read-only call before activating the integration.

Credentials you'll need
API Key*
MailerLite Classic → Integrations → Developer API → Copy API Key
Actions

14 actions your agent can call

Read and write operations available to your Actionist agent.

Triggers

7 events your agent can react to

Events your agent watches for, and the actions it kicks off in response.

FAQs

Questions about MailerLite Classic + Actionist

How does Actionist connect to MailerLite Classic?
Go to the Apps tab, find MailerLite Classic, and click Connect. You will be prompted to enter your MailerLite Classic API key. To generate one, log into your MailerLite Classic account, go to Integrations → Developer API, and copy your API key. Paste it into Actionist and click Test Connection. Actionist runs a read-only verification call to confirm the key is valid before any actions run.
Does Actionist support MailerLite (the new version) as well as MailerLite Classic?
MailerLite Classic and the new MailerLite are separate products with different APIs. This integration connects to the MailerLite Classic API (v2). If your account was created after 2022, you are likely on the new MailerLite platform, which uses a different API key format and endpoint. Check which platform you are on by logging in — Classic accounts show 'Classic' in the account settings. A separate Actionist integration handles the new MailerLite.
How quickly does Actionist react to new subscribers or unsubscribes in MailerLite Classic?
Actionist polls MailerLite Classic triggers within about a minute, so events like New Subscriber, Subscriber Unsubscribed, Subscriber Bounced, and Campaign Sent reach your connected apps within approximately 60 seconds of occurring in MailerLite Classic. The polling interval means there is a short lag between the event and the agent's response — this is normal and expected.
Can Actionist add a subscriber to multiple MailerLite Classic groups at once?
MailerLite Classic's API assigns subscribers to one group at a time per API call. To add a subscriber to multiple groups, the agent makes one Create/Update Subscriber or Add Subscriber to Group call per group. Actionist handles this as sequential steps in the same agent task, so the subscriber lands in all target groups within the same minute without any manual intervention.
What happens if I try to add an email address that previously unsubscribed?
By default, adding a previously unsubscribed, bounced, or unconfirmed email to a MailerLite Classic group will fail with an error. The Create/Update Subscriber action includes an optional Resubscribe flag — set this to true only when you have obtained fresh explicit consent from the contact to re-add them. Use this option responsibly and in compliance with your local email marketing regulations.
Can Actionist send campaigns through MailerLite Classic?
The MailerLite Classic API (v2) does not expose an endpoint to create or send campaigns programmatically through the standard integration. Actionist can trigger actions based on campaign events (Campaign Sent) and read campaign statistics after a send, but cannot create new campaigns or schedule sends on your behalf. Campaign creation must be done directly inside the MailerLite Classic dashboard.
How can I use Actionist to maintain list hygiene in MailerLite Classic?
The most effective list hygiene pattern is to schedule a weekly agent task that checks subscriber group sizes using Get Account Groups and List Subscribers in Group, flags near-empty or stale segments, and confirms all active webforms are pointed at valid groups using Get Account Webforms. Separately, the Subscriber Bounced trigger can fire each time a bounce occurs, allowing the agent to update the CRM and log the event in a Google Sheets hygiene tracker automatically.
Can Actionist help me stay within my MailerLite Classic subscriber plan limit?
Yes. Set up a weekly Finance Agent task that calls Get Subscriber Count and compares the result to your plan's subscriber cap. When the count crosses 80% of the limit, the agent sends a proactive Slack alert to your Finance and Marketing teams so you have time to upgrade your plan before the billing cycle closes. This prevents unexpected overages without anyone needing to manually check the MailerLite Classic account page.
Get started

Connect your apps in minutes.

Start with a free instant demo, or talk to our team about a deployment designed for your business.