Integration
Connect MailerLite Classic to Lettr
When New Group fires in MailerLite Classic, your agent runs Add contact in Lettr. Describe the whole flow and it is built, tested on every scenario and kept running.
What the catalog holds today. Ask for anything missing and your agent reads the API documentation and adds it.
Build solutions, not workarounds.
What do you want MailerLite Classic and Lettr to do together?
Ask the assistant
Connect your AI client
Give your AI client this address.
https://mcp.apiant.aiOne connection does both: ask your client to act in an app once, or have it build an automation that keeps running. Any client that takes a remote MCP server. Nothing to install. Create your free account, then sign in once in your browser.
Set it up in your client
Claude Code
Run this in the directory you want to work in.
claude mcp add --transport http -s project apiant-ai https://mcp.apiant.aiStart Claude Code there, approve the server, and sign in in the browser page it opens.
Claude Code guide (opens in a new tab)Claude, web and desktop
Open Customize, then Connectors, then Add custom connector, and paste the address. On Team and Enterprise an owner adds it first.
Setup guide (opens in a new tab)Cursor
Add the address to your MCP configuration as a server URL. Cursor signs you in in your browser.
Setup guide (opens in a new tab)Zed
Open Settings, then AI, then MCP Servers, then Add Server, then Add Remote Server.
Setup guide (opens in a new tab)Codex and the ChatGPT desktop app
Open Settings, then MCP servers, then Add server, and choose Streamable HTTP. From the terminal, Codex takes the address with its own add command and then signs you in.
Setup guide (opens in a new tab)Any other MCP client
Paste the address where the client asks for a remote MCP server URL, and name the server apiant-ai where it lets you. APIANT's skills reach the client over the same connection.
Setup guide (opens in a new tab)Example flows
What MailerLite Classic can start in Lettr
When New Group in MailerLite Classic
then Add contact in Lettr
When New Group in MailerLite Classic
then Add contact to list in Lettr
Starting points drawn from the triggers and actions in the catalog today. Describe the flow you need, at any depth, and your agent builds it and tests every scenario before it ships.
Everything your agent can do with MailerLite Classic and Lettr
Triggers and actions 1 trigger · 29 actions
Trigger
New GroupTriggered when a new subscriber group is created in MailerLite.
Action
Add Subscriber to GroupAdds a subscriber to a MailerLite group, creating the subscriber if they do not exist yet.
Action
Create CampaignCreates a new regular or A/B email campaign addressed to the chosen groups or segments. Its HTML content is added afterwards.
Action
Create GroupCreates a new subscriber group in the MailerLite account and returns the created group.
Action
Delete CampaignDeletes a campaign from the MailerLite account. A scheduled campaign cannot be deleted until it has been cancelled.
Action
Delete GroupDeletes a subscriber group from the MailerLite account.
Action
Find Group by NameReturns the subscriber groups that match the specified group name.
Action
Get GroupReturns one subscriber group by its id, including its name, subscriber counts, email activity totals and dates.
Action
List CampaignsReturns the campaigns in your MailerLite account with the chosen status, with a basic summary and open and click stats for each campaign.
Action
List GroupsReturns the subscriber groups in the MailerLite account, with each group's subscriber counts, email stats and created and updated dates.
Action
List SegmentsReturns the segments stored in your MailerLite account, with each segment's title, rules, subscriber count and email engagement totals.
Action
List Subscriber GroupsReturns the groups a subscriber belongs to, with each group's subscriber counts and sent, opened and clicked totals.
Action
List SubscribersReturns the subscribers in the MailerLite account, optionally limited to one status such as active or unsubscribed.
Action
Remove Subscriber From a GroupRemoves a subscriber from a group, identified by the subscriber's id or email address. The subscriber stays in the account and in any other groups.
Action
Search SubscribersReturns the subscribers in your MailerLite account that match a search term, such as an email address or name.
Action
Send CampaignSends a draft campaign immediately or schedules it for a later time, and returns the campaign with its status and emails.
Action
Set Campaign ContentSets the HTML and plain-text content of a draft campaign, replacing what the campaign's email contains.
Action
Unsubscribe SubscriberMarks a subscriber as unsubscribed across the MailerLite account and returns the updated subscriber. Their name and fields can be updated in the same step.
Action
Update GroupRenames an existing subscriber group and returns the updated group with its subscriber and email counts.
Action
Add audience listCreates a new audience list in Lettr with the given name and returns the created list.
Action
Add contactAdds a new contact to your Lettr audience, optionally placing it on a list, setting custom properties, and sending a double opt-in confirmation email.
Action
Add contact to listAdds an existing contact to one of your audience lists. Succeeds whether the contact was newly added or was already on the list.
Action
Add templateCreates a new email template in Lettr from HTML or Topol editor JSON content, and publishes its first version with the merge tags found in the content.
Action
Delete contactPermanently deletes a contact from your Lettr audience.
Action
Get contactReturns a single audience contact, including its subscription status, custom properties, lists and topics.
Action
Get templateReturns a single email template by its slug, including its HTML, editor content, purpose, status and version details.
Action
List audience listsReturns all audience lists in your Lettr team, with each list's name and contact count.
Action
List contactsReturns the contacts in your Lettr audience, optionally narrowed by a search term, subscription status, list or segment.
Action
List templatesReturns the email templates in a Lettr project, optionally limited to one folder or to transactional or campaign templates.
Action
Update contactUpdates an existing contact in your Lettr audience, changing its email address, subscription status or custom properties. Fields left blank are not changed.
No trigger or action matches that. Ask your agent to add it: it reads the API documentation and builds what you describe.
Each app on its own
Reviews
What our customers say
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Questions
MailerLite Classic and Lettr, answered
What can start an automation from MailerLite Classic?
Any of MailerLite Classic's 1 trigger in the catalog, including New Group. Describe the moment in plain language and your agent picks the right one.
What can your agent do in Lettr when something happens in MailerLite Classic?
Any of Lettr's 11 actions, including Update contact, Add audience list, Add contact and Add contact to list. Your agent maps the data both ways and tests every scenario before it ships.
Can it also run from Lettr to MailerLite Classic?
Lettr has no triggers in the catalog today, so automations start in MailerLite Classic. If you need the other direction, ask: your agent reads Lettr's API documentation and adds it.
Do I have to build a connector for MailerLite Classic or Lettr?
No. Both are in the catalog with their triggers and actions. You describe the automation; your agent builds it, tests every scenario and keeps it running.
Can my AI client use MailerLite Classic and Lettr without building an automation?
Yes. With your AI client connected to APIANT, ask it to do something in either app once and it runs that action on the spot. Ask for an automation and your agent builds it, tests every scenario and keeps it running. One connection covers both.
What happens when something fails?
Your agent works that out for you. It plans the failure paths along with the happy path, then tests every scenario before it ships.
Is there a free plan?
Yes. Every plan includes the agent, including free, and building from your own AI client spends no assistant credits.