You can configure New Relic to flow alerts into Rootly following those instructions
Create a rootly webhook like shown below with
url: https://rootly.com/webhooks/incoming/new_relic_webhooks. With Bearer token the token shown in your integration page:
That's how the configuration should look end to end:
Click Test Notification to test your webhook and you should see something similar to the image below in https://rootly.com/account/alerts
All set !