You can see a list of your SendGrid API keys via the API Keys section of your SendGrid account’s Settings page. You’ll need to create a new API key to use with Paragon - press the “Create API Key” button to create a new key save it.
To add SendGrid to Paragon, click the ”+” button in the workflow canvas and choose Sendgrid from the sidebar. Under Connect your SendGrid account, choose “Add new account for SendGrid” and enter your SendGrid API key.