Get your Customer.io App API key
The App API key gives StackOne access to your workspace’s campaigns, broadcasts, segments, messages and other App API data.
Open Account settings
Sign in to your Customer.io account.
- Click the settings icon in the top right corner.
- Select Account settings.

Open API credentials
On the Account settings page, click API credentials.

Create an App API key
Click the App API keys tab, then click Create App API key.
- Name: enter a name that identifies the key, e.g.
StackOne Integration. - Click Create App API key in the new row to save the key.

Copy the API key
The New API key dialog shows your new key. Copy it and paste it into the App API Key field in StackOne Hub.
- The API key is shown only once and cannot be retrieved later. Store it securely for use later.
- Click Finish to close the dialog.

Find your data center
The App API Region field tells StackOne which Customer.io data center hosts your account.
Check the Data center
Go back to Account settings and click Privacy & data. The Data center panel shows where your account is hosted.
- If it shows European Data center, select European Union (api-eu) in the App API Region field in StackOne Hub.
- Otherwise, select United States (api).

Link the Account
Connect
- Click Connect.
- If applicable, the provider will redirect you to a sign-in or authorization page. Complete the provider’s authorization flow.
- Once authorization is successful, you will see a confirmation popup.
Use Actions
Next Steps
Webhooks setup
Configure receiving Events for Customer.io into StackOne.