Integration
Connect MailerLite to OnceOnly
When Subscriber Added to Group fires in MailerLite, your agent runs Add event in OnceOnly. 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 and OnceOnly to do together?
Ask the assistant
Connect your AI client
Give your AI client this address.
https://mcp.apiant.aiAny 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 can start in OnceOnly
When Subscriber Added to Group in MailerLite
then Add event in OnceOnly
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 and OnceOnly
Triggers and actions 10 triggers · 20 actions
- Campaign Sent
Triggers when a campaign has been sent out.
- Spam Complaint
Triggers when a subscriber issues a spam complaint about an email.
- Subscriber Added to Group
Triggers when a subscriber is added to a group.
- Subscriber Bounced
Triggers when an email to a subscriber bounces.
- Subscriber Completed Automation
Triggers when a subscriber completed a selected workflow.
- Subscriber Created
Triggers when a subscriber was created on your mailing list.
- Subscriber Fields Updated
Triggers when the subscriber fields have been updated.
- Subscriber Removed From Group
Triggers when a subscriber has been removed from a group.
- Subscriber Triggered Automation
Triggers when a subscriber triggers a selected workflow.
- Subscriber Unsubscribed
Triggers when a subscriber has unsubscribed from your mailing list.
- Add Subscriber to a Group
Add existing subscriber to a specific group by email address.
- Change Subscriber Email
Change subscriber email to another.
- Create a Draft Campaign
Create a Draft Campaign
- Create or Update Subscriber
Create a new subscriber or Update an existing subscriber based on their email.
- Create Subscribers Group
Create a new subscribers group.
- Find a Group
Search for a group by name
- Find a Subscriber
Search for a subscriber by email or name
- Remove Subscriber From a Group
Remove subscriber from a specific group by email address.
- Unsubscribe Subscriber
Sets the contact's status to "Unsubscribed".
- Add event
Adds an event to an agent run's timeline in OnceOnly, such as a step starting, a tool call, or a failure.
- Add policy
Creates or updates the governance policy for an agent, such as rate limits, spend limits and allowed or blocked tools.
- Add tool
Creates or updates a tool in your OnceOnly tool registry, pointing at your backend URL. Returns the saved tool without its secret.
- Check & Lock
Checks an idempotency key and locks it if it is new, telling you whether the event is a first occurrence or a duplicate.
- Delete tool
Permanently deletes a tool from your OnceOnly tool registry.
- Get policy
Returns the governance policy configured for an agent.
- Get run
Returns a run's timeline: the run id, the total number of events and the list of events recorded for it.
- Get tool
Returns the details of a registered tool by name, including its URL, scope, enabled state and retry settings.
- List policies
Returns every agent policy on the OnceOnly account, each with its agent id and policy settings.
- List runs
Returns the runs recorded on your OnceOnly account, with each run's latest status and event count.
- List tools
Returns the tools registered in your OnceOnly tool registry for a scope.
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 and OnceOnly, answered
What can start an automation from MailerLite?
Any of MailerLite's 10 triggers in the catalog, including Subscriber Added to Group, Subscriber Completed Automation, Subscriber Created and Subscriber Fields Updated. Describe the moment in plain language and your agent picks the right one.
What can your agent do in OnceOnly when something happens in MailerLite?
Any of OnceOnly's 11 actions, including Add event, Add policy, Add tool and Check & Lock. Your agent maps the data both ways and tests every scenario before it ships.
Can it also run from OnceOnly to MailerLite?
OnceOnly has no triggers in the catalog today, so automations start in MailerLite. If you need the other direction, ask: your agent reads OnceOnly's API documentation and adds it.
Do I have to build a connector for MailerLite or OnceOnly?
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.
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.