# Linking Paddle as a source - Docs

The Paddle connector syncs customers, discounts, prices, products, subscriptions, transactions, and adjustments from your Paddle account into PostHog.

## 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 Paddle.

3.  Next, you need an API key from Paddle. In your Paddle dashboard, go to **Developer tools** > **Authentication** and click **New API key**. Give the key a name and grant it **Read** access to the following entities:

    -   Customers
    -   Discounts
    -   Prices
    -   Products
    -   Subscriptions
    -   Transactions
    -   Adjustments

    Copy the generated API key (it starts with `pdl_live_...` for live keys or `pdl_sdbx_...` for sandbox keys).

4.  Back in PostHog, paste the API key into the **API Key** field and click **Next**.

5.  Select the tables you want to sync and modify the method and frequency as needed. Once done, click **Import**.

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

## Configuration

| Option | Type | Required |
| --- | --- | --- |
| API Key | password | Yes |

## Sync methods

Only the `transactions` table supports incremental and append-only syncing, using `billed_at` as the replication key. All other tables (customers, discounts, prices, products, subscriptions, and adjustments) are synced via full table refresh.

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