How do I lookup emails from Clay to verify if they exist in HubSpot and check their lifecycle stage status?

Use HubSpot's Lookup Contact feature in Clay with the email as your unique identifier. Go to Enrichment panel → HubSpot → Lookup Contact, enter the email in the Contact Query field, and run a 10-row test to confirm matches are being returned. Once the lookup returns the contact record, you can use the results to filter by lifecycle stage or drive other conditional logic based on the contact's existing data in HubSpot.