Get conversations for contacts

Find real email, SMS, and call conversations by the contacts’ stored email addresses and phone numbers, without a helpdesk ticket requirement. Includes open and closed threads by default, with no recent-date cutoff. Excludes junk/deleted streams and synthetic bulk-campaign activity. Newest message first, across accessible inboxes. API keys have company scope; delegate tokens need contacts:* read scope and follow current membership, inbox/team/monitor and contact-type sharing permissions (respecting channel opt-outs). Every contact must be active and in the authenticated company. Empty addresses return an empty page.