> AI agents: this is one page from PostHog's docs. Full index of Markdown docs for LLMs: https://posthog.com/llms.txt

# Linking MailerLite as a source

Canonical URL: https://posthog.com/docs/data-pipelines/sources/mailerlite

> **Cloud region:** This page uses US Cloud hosts. For an EU Cloud project, use `https://eu.posthog.com` instead of `https://app.posthog.com` (app host for links).

## On this page

- [Adding a data source](#adding-a-data-source)
- [Available tables](#available-tables)
- [Sync limitations](#sync-limitations)
- [Configuration](#configuration)
- [Supported tables](#supported-tables)

![](https://res.cloudinary.com/dmukukwp6/image/upload/texture_tan_9608fcca70)

![](https://res.cloudinary.com/dmukukwp6/image/upload/texture_tan_dark_a92b0e022d)

Let AI connect your sources for you

Skip the manual setup — run this in your project and the wizard auto-detects your databases and APIs and connects them to PostHog.

`npx @posthog/wizard warehouse`

![PostHog Wizard hedgehog](https://res.cloudinary.com/dmukukwp6/image/upload/wizard_3f8bb7a240.png)

![](https://res.cloudinary.com/dmukukwp6/image/upload/wizard_3f8bb7a240.png)Let AI connect your sources for you

The MailerLite connector pulls your MailerLite email marketing data into the PostHog data warehouse.

## Adding a data source

1.  Go to the [sources tab](https://app.posthog.com/data-management/sources) of the data pipeline section in PostHog.
2.  Click **\+ New source** and then click **Link** next to MailerLite.
3.  You need a MailerLite API key, which you can create in your [MailerLite integrations settings](https://dashboard.mailerlite.com/integrations/api).
4.  Back in PostHog, enter the key in the `API key` field and click **Next**.
5.  Select the tables you want to sync, set the sync method and frequency, then click **Import**.

Once the syncs are complete, you can start using MailerLite data in PostHog.

## Available tables

| Table | Description | Sync method |
| --- | --- | --- |
| `subscribers` | Subscribers in your account | Full refresh |
| `campaigns` | Email campaigns | Full refresh |
| `groups` | Subscriber groups | Full refresh |
| `segments` | Subscriber segments | Full refresh |
| `fields` | Custom subscriber field definitions | Full refresh |
| `automations` | Automation workflows | Full refresh |
| `forms_popup` | Pop-up forms | Full refresh |
| `forms_embedded` | Embedded forms | Full refresh |
| `forms_promotion` | Promotion forms | Full refresh |
| `webhooks` | Configured webhooks | Full refresh |

**Incremental** tables sync only new or updated records on each run. **Full refresh** tables reload all data on each sync.

## Sync limitations

The MailerLite API exposes no server-side timestamp filter on any list endpoint, so every table is full-refresh only.

## Configuration

| Option | Type | Required |
| --- | --- | --- |
| `API key` | password | Yes |

## Supported tables

| Table | Description | Sync method | Incremental field | Primary key |
| --- | --- | --- | --- | --- |
| `subscribers` | A subscriber (contact) in the MailerLite account, including status and custom fields. | Webhook, Full refresh | — | — |
| `campaigns` | An email campaign in MailerLite, including its type, status, and delivery settings. | Full refresh | — | — |
| `groups` | A group (segment-like collection) of subscribers in MailerLite. | Full refresh | — | — |
| `segments` | A dynamic segment of subscribers in MailerLite defined by filter conditions. | Full refresh | — | — |
| `fields` | A custom field definition used to store extra data on subscribers. | Full refresh | — | — |
| `automations` | An automation (workflow) in MailerLite that triggers emails based on subscriber events. | Full refresh | — | — |
| `forms_popup` | A pop-up subscription form in MailerLite used to capture new subscribers. | Full refresh | — | — |
| `forms_embedded` | An embedded subscription form in MailerLite used to capture new subscribers. | Full refresh | — | — |
| `forms_promotion` | A promotion form in MailerLite used to display promotional content to visitors. | Full refresh | — | — |
| `webhooks` | A webhook subscription in MailerLite that delivers event notifications to an external URL. | Full refresh | — | — |
| `campaign_subscriber_activity` | One row per recipient of a sent MailerLite campaign, with that recipient's opens and clicks. | Full refresh | — | — |
| `group_subscribers` | Active subscribers in each MailerLite group, one row per group and subscriber. | Full refresh | — | — |
| `segment_subscribers` | Active subscribers that match each MailerLite segment, one row per segment and subscriber. | Full refresh | — | — |
| `automation_activity` | A subscriber's run through a MailerLite automation, whether active, completed, canceled or failed. | Full refresh | — | — |
| `ecommerce_shops` | An external shop connected to the MailerLite account through the E-commerce API. | Full refresh | — | — |
| `ecommerce_orders` | An order placed in a connected shop, one row per shop and order. | Full refresh | — | — |
| `ecommerce_products` | A product synced from a connected shop, one row per shop and product. | Full refresh | — | — |
| `ecommerce_categories` | A product category synced from a connected shop, one row per shop and category. | Full refresh | — | — |