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Connect HubSpot with Opt-in Samurai

Login to your HubSpot account

Click on your profile icon on top left

From the drop down, click Integrations

From the left sidebar, click “Get your HubSpot API Key”

Next page will show a button to View API Key, click it

Copy your API Key

Now go to your WordPress’ WP-Admin > Opt-in Samurai > 3rd Party Integration

Click Activate button under HubSpot logo

Enter / Paste the API Key in the form below

Hit Save Changes button