Creating Custom Voice Experiences in HubSpot: A Step-by-Step Guide to Voice API Integration

Creating Custom Voice Experiences in HubSpot: A Step-by-Step Guide to Voice API Integration TL;DR Most voice integrations fail because they treat HubSpot as a passive log—contact data arrives after the call ends. Real-time personalization requires pulling contact context during the call, patching deal objects mid-conversation, and handling authentication without blocking audio. This guide shows how to wire Twilio's voice API to HubSpot's CRM API scopes, sync contact data in <200ms, and build conversational AI that actually knows your customer. Prerequisites HubSpot Setup You need a HubSpot account with API access enabled. Generate a private app token with scopes: crm.objects.contacts.read , crm.objects.contacts.write , crm.objects.deals.read , and crm.objects.deals.write . Store this in your environment as HUBSPOT_API_KEY . Verify your account tier supports custom properties—Enterprise or Professional plans required for contact/deal object patching. Twilio Credentials Sign up for a Twi