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The voice agent that sells voice agents

A bilingual voice agent on a real phone number runs the discovery call itself, files a structured briefing in Notion before the call ends, and is bounded by a database-enforced spend cap.

Client
Axera Flow
Sector
Technology · Micro business
Timeline
Since May 2026
Status
In production

The problem

Selling AI voice agents is a credibility problem before it's a sales problem. Prospects who've never used one don't trust demo videos. Meanwhile the warming Canadian pipeline meant unpaid 30–45 minute discovery calls — repeated questions about industry, stack, and goals — were starting to dominate the calendar.

The solution

A bilingual voice agent reachable at a real phone number that runs the discovery call itself, then files a structured briefing in Notion (plus a WhatsApp summary) before the call has fully ended. Three defensive layers — rate limiting, a database-enforced CAD 20/day spend cap, and a heartbeat monitor — keep a misconfigured telephony vendor from quietly burning a five-figure phone bill.

Stack

  • Retell AI — Real-time voice agent platform
  • Claude API — Modelos da Anthropic via API (Opus, Sonnet, Haiku)
  • n8n — Automação self-hosted, fluxos visuais
  • Postgres — Relational database
  • Notion — Notion as interface / CMS
  • Cal.com — Open-source scheduling
  • Hetzner — VPS hosting
  • Docker — Containerized deployment

Measured impact

Daily hard cap (DB-enforced)

CAD 20

Concurrent calls

20

Best model in test

Haiku 4.5

Axera Flow · AI & automation, built and operated axeraflow.ai