When creating a new Lead Capture form you can choose to send submissions directly to your Drip account.
Step 1 - Add A New Provider
Under the integrations tab select 'providers' and click the 'add a new provider button'
Step 2 - Connect To Drip
Enter these details in the form as shown below:
Step 3 - Select A Tag
When someone opts-in to your form, a tag of your choice will be applied to their record: