--- title: "Connect MailerLite and PostStack - APIANT.ai" description: "When \"Subscriber Added to Group\" fires in MailerLite, your agent runs \"Add a contact\" in PostStack." canonical: "https://apiant.ai/connect/mailerlite-to-poststack" --- # Connect MailerLite and PostStack When **Subscriber Added to Group** fires in [MailerLite](https://apiant.ai/connections/mailerlite), your agent runs **Add a contact** in [PostStack](https://apiant.ai/connections/poststack), or **Contact Updated (instant)** in PostStack to **Change Subscriber Email** in MailerLite. Describe the whole flow and it is built, tested on every scenario and kept running. MailerLite **10** triggers MailerLite **9** actions PostStack **7** triggers PostStack **31** actions What the catalog holds today. Ask for anything missing and your agent reads the API documentation and adds it. ## What do you want MailerLite and PostStack to do together? Give your AI client this address. `https://mcp.apiant.ai` One 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.ai` Start Claude Code there, approve the server, and sign in in the browser page it opens. [Claude Code guide (opens in a new tab)](https://apiant.ai/docs/mcp/claude-code) ### 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)](https://apiant.ai/docs/mcp) ### 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)](https://apiant.ai/docs/mcp) ### Zed Open Settings, then AI, then MCP Servers, then Add Server, then Add Remote Server. [Setup guide (opens in a new tab)](https://apiant.ai/docs/mcp) ### 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)](https://apiant.ai/docs/mcp) ### 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)](https://apiant.ai/docs/mcp) Example flows ## What MailerLite and PostStack can do together ### From MailerLite to PostStack - When **Subscriber Added to Group** in MailerLite then **Add a contact** in PostStack - When **Subscriber Completed Automation** in MailerLite then **Add contacts to segment** in PostStack ### From PostStack to MailerLite - When **Contact Updated (instant)** in PostStack then **Change Subscriber Email** in MailerLite - When **New Contact (instant)** in PostStack then **Add Subscriber to a Group** in MailerLite 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 PostStack ## Triggers and actions 17 triggers · 40 actions - Trigger **Campaign Sent** Triggers when a campaign has been sent out. - Trigger **Spam Complaint** Triggers when a subscriber issues a spam complaint about an email. - Trigger **Subscriber Added to Group** Triggers when a subscriber is added to a group. - Trigger **Subscriber Bounced** Triggers when an email to a subscriber bounces. - Trigger **Subscriber Completed Automation** Triggers when a subscriber completed a selected workflow. - Trigger **Subscriber Created** Triggers when a subscriber was created on your mailing list. - Trigger **Subscriber Fields Updated** Triggers when the subscriber fields have been updated. - Trigger **Subscriber Removed From Group** Triggers when a subscriber has been removed from a group. - Trigger **Subscriber Triggered Automation** Triggers when a subscriber triggers a selected workflow. - Trigger **Subscriber Unsubscribed** Triggers when a subscriber has unsubscribed from your mailing list. - Action **Add Subscriber to a Group** Add existing subscriber to a specific group by email address. - Action **Change Subscriber Email** Change subscriber email to another. - Action **Create a Draft Campaign** Create a Draft Campaign - Action **Create or Update Subscriber** Create a new subscriber or Update an existing subscriber based on their email. - Action **Create Subscribers Group** Create a new subscribers group. - Action **Find a Group** Search for a group by name - Action **Find a Subscriber** Search for a subscriber by email or name - Action **Remove Subscriber From a Group** Remove subscriber from a specific group by email address. - Action **Unsubscribe Subscriber** Sets the contact's status to "Unsubscribed". - Trigger **Contact Deleted (instant)** Fires when a contact is deleted (event: contact.deleted). - Trigger **Contact Updated (instant)** Fires when a contact is updated (event: contact.updated). - Trigger **Email Bounced (instant)** Fires when an email bounces (event: email.bounced). - Trigger **Email Delivered (instant)** Fires when an email is delivered (event: email.delivered). - Trigger **New Contact (instant)** Fires when a contact is created (event: contact.created). - Trigger **New Inbound Email** Polls for newly received inbound emails. - Trigger **New Sent Email (instant)** Fires when an email is sent (event: email.sent). - Action **Add a broadcast** Create a new marketing broadcast. - Action **Add a contact** Create a new contact. - Action **Add a segment** Create a new manual contact segment. - Action **Add a template** Create a new email template. - Action **Add contacts to segment** Add contacts to an existing segment. - Action **Add suppression** Add an address to the suppression list. - Action **Cancel broadcast** Cancel an in-flight broadcast. - Action **Cancel email** Cancel a scheduled or queued email before it sends. - Action **Delete a contact** Delete a contact. - Action **Delete a template** Delete an email template. - Action **Get a contact** Fetch one contact by ID. - Action **Get a template** Fetch one email template by ID. - Action **Get broadcast** Retrieve one broadcast by its public id, including the HTML and text bodies that the list endpoint omits. - Action **Get email** Fetch one sent or queued email by ID. - Action **Get email events** Get the delivery event timeline for one email. - Action **Get inbound email** Fetch one received inbound email by ID. - Action **Import contacts** Bulk-import a CSV list of contacts. - Action **List broadcasts** List marketing broadcasts. - Action **List contacts** List contacts in the account. - Action **List emails** List sent, queued, and scheduled emails. - Action **List inbound emails** List emails received via inbound parsing. - Action **List segments** List contact segments. - Action **List suppressed addresses** List addresses on the suppression list. - Action **List templates** List email templates. - Action **Send an email** Send a transactional email through PostStack. - Action **Send broadcast** Start sending a broadcast to its recipients. - Action **Send emails in batch** Send up to 100 emails in a single request. - Action **Update a contact** Update an existing contact's fields. - Action **Update a template** Update an email template, creating a new version. - Action **Update email** Reschedule a queued email's send time. - Action **Validate email address** Check whether an email address is valid and deliverable. ## Each app on its own - [ **MailerLite** MailerLite’s super-fast email marketing platform helps you grow your business online using innovative email...](https://apiant.ai/connections/mailerlite) - [ **PostStack** EU-hosted email API for transactional and marketing email, with contacts, broadcasts, and analytics](https://apiant.ai/connections/poststack) Reviews ## What our customers say ## More from MailerLite - [ **MailerLite to Frontrow** FrontRow software allows small businesses to easily generate reviews online by requesting reviews from...](https://apiant.ai/connect/mailerlite-to-frontrow) - [ **MailerLite to Hyperstack Certificates** Hyperstack helps you easily create and manage digital certificates & badges for your events or courses.](https://apiant.ai/connect/mailerlite-to-hyperstack-certificates) - [ **MailerLite to Salesforce** Salesforce is a leading enterprise customer relationship management (CRM) platform.](https://apiant.ai/connect/mailerlite-to-salesforce) - [ **MailerLite to Slack** Slack is a messaging platform for teams. Post messages, manage channels, users, reminders, and react to...](https://apiant.ai/connect/mailerlite-to-slack) - [ **MailerLite to Google Drive** Google Drive is a cloud storage solution for uploading, sharing, and collaborating on files across devices...](https://apiant.ai/connect/mailerlite-to-google-drive) - [ **MailerLite to Mailchimp** Mailchimp marketing automation and email platform.](https://apiant.ai/connect/mailerlite-to-mailchimp) ## More into PostStack - [ **HubSpot to PostStack** HubSpot is your all-in-one stop for all of your marketing software needs.](https://apiant.ai/connect/hubspot-to-poststack) - [ **Google Sheets to PostStack** Google Sheets is Google's online spreadsheet app for creating, editing and sharing spreadsheets.](https://apiant.ai/connect/google-sheets-to-poststack) - [ **Gmail to PostStack** Gmail is Google’s email service, featuring spam protection, search functions, and seamless integration with...](https://apiant.ai/connect/gmail-to-poststack) - [ **Google Calendar to PostStack** Google Calendar is a time management tool providing scheduling features, event reminders, and integration...](https://apiant.ai/connect/google-calendar-to-poststack) - [ **Google Drive to PostStack** Google Drive is a cloud storage solution for uploading, sharing, and collaborating on files across devices...](https://apiant.ai/connect/google-drive-to-poststack) - [ **Mailchimp to PostStack** Mailchimp marketing automation and email platform.](https://apiant.ai/connect/mailchimp-to-poststack) Questions ## MailerLite and PostStack, 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 PostStack when something happens in MailerLite? Any of PostStack's 31 actions, including Send an email, Send broadcast, Send emails in batch and Update a contact. Your agent maps the data both ways and tests every scenario before it ships. ### ### Can it also run from PostStack to MailerLite? Yes. When something happens in PostStack, your agent can act in MailerLite too. This page covers both directions: PostStack's triggers and MailerLite's actions are listed here as well. ### ### Do I have to build a connector for MailerLite or PostStack? 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 and PostStack 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.