VeraDial Zapier Integration API
REST Hooks integration API used by VeraDial's native Zapier app and documented for direct callers - test a vdk_ API key, list selectable phone lines, fetch event samples, and subscribe or unsubscribe REST Hooks for call.screened, voicemail.received, sms.reply_sent and appointment.booked events, plus session-token API-key management routes. OpenAPI contract generated from the documentation by API Evangelist (2026-09-23); not the provider's own document.