MailerLite MCP server

What the model can do

MailerLite email marketing: subscribers by email, status or group with their fields and engagement, the subscriber total, groups with counts and rates, campaigns with sent, open, click, unsubscribe and bounce numbers and who opened or clicked, forms with conversions, and automations with their stats; and, when granted, add, update, delete or forget subscribers, manage groups and membership, draft, edit, schedule (send), cancel or delete campaigns, and create custom fields (MailerLite allows 120 requests per minute per token.).

Reads

• mailerlite_overviewThe MailerLite account at a glance: total subscribers, the largest groups with active/unsubscribed/bounced counts and rates…
• mailerlite_subscribersMailerLite subscribers: one by exact email (with fields, groups and engagement), or a list by status (active, unsubscribed, unconfirmed, bounced…
• mailerlite_groupsMailerLite groups with their counts (active, unsubscribed, unconfirmed, bounced, junk), emails sent and open/click rates.
• mailerlite_campaignsMailerLite campaigns, newest first: name, type (regular, ab, resend, rss), status (sent, draft, ready), subject and sender…
• mailerlite_campaignOne MailerLite campaign by id: every email in it (subject, sender, preview link), timing…
• mailerlite_formsMailerLite sign-up forms — pop-ups, embedded forms and promotions — with opens, conversions (sign-ups), conversion rate…
• mailerlite_automationsMailerLite automations: name, whether enabled, complete or broken, number of emails, subscribers who entered, completed or are queued, and stats…

Acts, when you ask

These change something in MailerLite. The model is told to use them only when you ask for exactly that, and each one is granted by name: per team on a shared connection, by the owner on a personal one.

• mailerlite_add_subscriberAdds a subscriber to MailerLite by email, or updates the one with that email (MailerLite upserts, and never removes fields or groups on this call)…
• mailerlite_update_subscriberUpdates one MailerLite subscriber (by id or email): fields (only those passed change), status, or the full set of groups…
• mailerlite_delete_subscriberDeletes a subscriber (by id or email) from the MailerLite account.
• mailerlite_forget_subscriberGDPR-forgets a subscriber (by id or email): removed from the account now and every record of them permanently erased by MailerLite after 30 days.
• mailerlite_create_groupCreates a subscriber group in MailerLite.
• mailerlite_rename_groupRenames a MailerLite group.
• mailerlite_delete_groupDeletes a MailerLite group permanently.
• mailerlite_assign_to_groupAdds an existing subscriber (by id or email) to a group.
• mailerlite_unassign_from_groupRemoves a subscriber (by id or email) from a group.
• mailerlite_create_campaignDrafts a regular MailerLite email campaign: name, subject, sender (an address already verified in MailerLite)…
• mailerlite_update_campaignEdits a draft MailerLite campaign: name, subject, sender, reply-to, HTML content (Advanced plan) or the groups/segments it goes to…
• mailerlite_schedule_campaignSends a MailerLite campaign to every subscriber in its groups or segments: now (instant, cannot be undone), at a date and time (scheduled…
• mailerlite_cancel_campaignCancels a MailerLite campaign that is ready (scheduled but not started) and returns it to draft.
• mailerlite_delete_campaignDeletes a MailerLite campaign permanently, with its report if it was sent.
• mailerlite_create_fieldCreates a custom subscriber field (text, number or date) in MailerLite, available on every subscriber.

Connect it

First connect MailerLite on Dashboard → Connections, then add Memtro to your client once. The MailerLite tools appear alongside the tools of everything else you have connected; nothing is configured per connector.

claude plugin marketplace add memtro-org/claude-memtro
claude plugin install memtro@memtro --config api_key=sk-memtro-...

{
  "mcpServers": {
    "memtro": {
      "url": "https://platform.memtro.com/api/mcp",
      "headers": {
        "Authorization": "Bearer sk-memtro-..."
      }
    }
  }
}

{
  "mcp": {
    "memtro": {
      "type": "remote",
      "url": "https://platform.memtro.com/api/mcp",
      "headers": {
        "Authorization": "Bearer sk-memtro-..."
      }
    }
  }
}

Who may use it

The key identifies the person, and the server offers that person the tools they may use everywhere else in Memtro. A shared MailerLite connection is used by the teams an administrator granted it to, tool by tool, on the Permissions page; a personal connection is used by its owner alone, and its tools that act stay off until the owner allows them. See Teams and permissions and Connectors.

Ask it like this

• › How did the 'Autumn offers' campaign do, and who clicked?
• › Which groups have the highest open rate, and which has the most bounces?
• › Is tom.ashby@example.co.uk subscribed, which groups is he in, and does he open anything?
• › Is the welcome automation still running and how many people are queued in it?
• › Add jane.cole@northwind.example to the Webinar group

Questions

Is this an official MailerLite MCP server?

No. It is Memtro's MCP server with Memtro's MailerLite connector behind it: the connector reads MailerLite through its API with the credentials you connect on Dashboard → Connections, and MailerLite publishes nothing here. The same endpoint carries every other system you connect and Memtro's memory tools.

What does it cost?

Nothing on top of Memtro. One price per organisation by its number of users, from $50 a month for up to 10 users after a 7-day free trial, with every connector, the MCP server, jobs and memory included. You bring your own model keys.

Can it change anything in MailerLite?

Only when you ask, and only what it has been granted: add a subscriber, or update the one with that email, optionally into groups; update a subscriber's fields, status or full set of groups; delete a subscriber (their data is kept in case they resubscribe); forget a subscriber under GDPR, erased permanently after 30 days; create a group; rename a group; delete a group permanently; add a subscriber to a group; remove a subscriber from a group; draft a regular email campaign; edit a draft campaign; send a campaign now or schedule it, emailing its whole audience; cancel a scheduled campaign back to draft; delete a campaign permanently; create a custom subscriber field. Every other tool reads, searches or lists. An administrator grants each acting tool by name per team, and a personal connection acts only after its owner allows it.

Which clients work?

Any MCP client that speaks Streamable HTTP: Claude Code, Cursor, Claude Desktop, OpenCode, Codex, Zed, Windsurf, Cline and the Anthropic and OpenAI SDKs. There is no local process to run; the server is remote and authenticated with your key.

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