Grounded support
Policy answers use RAG with citations and low-confidence refusal.
AI SOLUTIONS ENGINEERING PORTFOLIO
A voice receptionist that can explain, verify and act.
Northstar Voice AI combines grounded retrieval, safe business tools, MCP and provider-independent voice orchestration for a fictional New Zealand electronics retailer.
AI disclosure: You are interacting with an AI demonstration. All stores, products, orders and customers are fictional.
EXPERIENCENext.js + Firebase App HostingVoice, simulator and admin UI
↓ HTTPSORCHESTRATIONCloud Run agent serviceAgent, MCP, RAG, Vapi webhooks
↓FirestoreBusiness + vectors
AI providersHosted or fake
9MCP tools
35+Evaluation cases
3Runtime modes
0Keys needed for mock mode
CAPABILITIES
Built around the hard parts, not a voice-widget mockup.
Safe business tools
Verified orders, store inventory, idempotent tickets and transactional bookings.
Remote MCP
A stateless Streamable HTTP MCP server exposes nine strictly validated tools.
Production path
Firebase App Hosting, Cloud Run, Firestore Vector Search and Vapi adapters.
Evaluation
Deterministic safety, retrieval, tool-selection and idempotency regression cases.
Observable by design
Correlated request IDs, redacted audit records and latency metrics.
THREE-MINUTE RECRUITER DEMO
Try the core system without a microphone.
- Ask whether opened headphones can be returned after ten days.
- Find a gaming laptop under NZ$2,500 in Auckland.
- Check NS-10004 with demo.customer@example.com.