In your Sendpulse account, please select Transactional emails
On Transactional Campaigns page, please click 'API keys'
On Account settings page, in API tab, you can both create API key, that nGrow will use to send emals, and add a webhook, provided to you during nGrow app onboarding on 'Select Email Service Provider' page (that looks like https://email-webhooks.ngrow.ai/api/v1/web2wave-webhook/<ngrow_app_id>).
Please note that the webhook should capture the following events: