In the dashboard, open the App Marketplace. Find Apollo in the Sequences category and select it. Click Connect.
For Apollo, click Get the API key via Apollo Developer Settings to create or copy an existing API Key.
If creating a new key, simply give it a Name, then click "Create API Key". Copy the key into Knock2 to complete the integration.
Connecting Apollo.io in the App Marketplace will not write any data to your Apollo sequences. To write data, you must set up a play or add contacts to a sequence from the Contacts tab.
From the Contacts tab and within Plays, you can add Contacts to Apollo Sequences ad-hoc or automatically!