Generate an API key

Resend authenticates requests with a secret API key that you create in the Resend dashboard.

On the API keys page, click Create API key.

In the Add API Key dialog, enter a name in the Name field, then choose a Permission.

Select Full access so StackOne can manage domains, contacts, broadcasts, and other resources — not only send email.
Choose Sending access instead if the key should only send emails, and optionally use the Domain menu to restrict it to a single domain.
Click Add to generate the key.

In the View API Key dialog, click Copy to clipboard, then paste the value into the API Key field in StackOne Hub.

The key is shown only once — You can only see this key once. Store it safely. — and cannot be retrieved later.
Click Done to close the dialog.

Linking the Account from the Hub

Use one of the three Linking Account Methods to access the Hub. Fill out the following fields using details from your provider:

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

If the account linking is successful, you will see the newly linked account in your Accounts page.