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

# Linking Churnkey as a source

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

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

## On this page

- [Prerequisites](#prerequisites)
- [Adding a data source](#adding-a-data-source)
- [Sync modes](#sync-modes)
- [Configuration](#configuration)
- [Supported tables](#supported-tables)
- [Troubleshooting](#troubleshooting)

![](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 Churnkey connector pulls your cancel-flow session data into the PostHog Data warehouse, so you can analyze churn, retention, and cancellation behavior alongside your product data.

## Prerequisites

You need a Churnkey account and a Data API key. The Data API key is distinct from your Cancel Flow API key and is requested from Churnkey support at [support@churnkey.co](mailto:support@churnkey.co).

## Adding a data source

1.  In PostHog, go to the [Sources tab](https://app.posthog.com/data-management/sources) of the data pipeline section.
2.  Click **\+ New source** and click **Link** next to this source.
3.  Enter your credentials (see [Configuration](#configuration) below) and click **Next**.
4.  Select the tables you want to sync, choose a sync method and frequency, then click **Import**.

Once the syncs are complete, you can start querying this data in PostHog.

When linking Churnkey, you'll need:

-   **Data API key** – request one from [support@churnkey.co](mailto:support@churnkey.co). This is distinct from your Cancel Flow API key. Once issued, it is shown in Churnkey under **Settings → Account**.
-   **App ID** – shown in Churnkey under **Settings → Account**.

## Sync modes

Each table can be synced in one of several modes, depending on what the source supports:

-   **Webhook** (when available) – the source pushes changes to PostHog in real time. Fastest freshness, lowest ongoing cost, and the only mode that reliably captures updates and deletes.
-   **Incremental** – only new or updated rows are synced on each run, using a cursor field (such as an `updated_at` timestamp). Cheaper than a full refresh, but deletes aren't captured.
-   **Append only** – new rows are appended using a cursor field; existing rows are never updated. Ideal for immutable, append-only tables like event logs.
-   **Full refresh** – the whole table is reloaded on every sync. Use it when a table has no reliable cursor or when you need deletions reflected.

See [sync methods](https://posthog.com/docs/data-pipelines/sources.md#sync-methods) for a full explanation of how each mode works and how to choose between them.

This source is full refresh only.

## Configuration

| Option | Type | Required |
| --- | --- | --- |
| `Data API key` | password | Yes |
| `App ID` | text | Yes |

## Supported tables

| Table | Description | Sync method | Incremental field | Primary key |
| --- | --- | --- | --- | --- |
| `Sessions` | A single cancel-flow session: one customer's pass through Churnkey's cancellation flow, including the offers presented, what they accepted, and the eventual outcome. | Full refresh | — | \_id |

## Troubleshooting

-   If you see an authentication error, check your Data API key and App ID under **Settings → Account**, then reconnect.
-   If you see a forbidden error, confirm you are using a Data API key and not a Cancel Flow key, then reconnect.
-   If your App ID is not recognized, check the App ID under **Settings → Account**, then reconnect.

If your sync is failing or data looks wrong, see the [Data warehouse troubleshooting guide](https://posthog.com/docs/data-warehouse/troubleshooting.md). If that doesn't help, [contact support](https://us.posthog.com/#panel=support%3Asupport%3Adata_warehouse%3A%3Atrue) – we're happy to help.