Please ensure that your Customer.io IP Address Allowlist is either open for all IPs or includes the Less IP](/guides/less-ip). This enables Less to connect to your Customer environment.

You can find the IP Address Allowlist under Account Settings → API Credentials → App API Keys.

Feel free to contact us if you need assistance whitelisting.

1

API Token

Go Account Settings → API Credentials → App API Keys. Create a new API token and paste it here.

To access your credentials on Customer.io, you must be an Account Admin or Member with the account-level permission, “Manage API credentials.”

2

Data Residency

Account Settings → Privacy and Data and check the Data Center in the top-right part of the screen. Input EU if your see “European Data Center” otherwise input “Other”.