Next-Generation Vapi Voice AI
Engineered with Autonomous Tool Calling.
We architect resilient Vapi assistant pipelines that execute live backend functions, query external APIs during phone conversations, and route callers through natural, low-latency dialogue trees.
What VAPX Engineers Inside Your Voice Stack
Custom tools, private LLM servers, and enterprise telephony orchestration.
Custom LLM Tool & Function Calling
Our Vapi agents can fetch customer account balances, verify passwords, check stock inventory, or create support tickets live while talking to the caller.
Custom Private Server URL
We connect Vapi to your own serverless endpoints (FastAPI, Express, Cloudflare Workers) for encrypted business logic and authentication.
BYOT (Bring Your Own Telephony)
Seamlessly integrate your existing Twilio, Vonage, or Telnyx SIP trunks without porting numbers or interrupting existing operations.
Multi-LLM Model Selection
Swap between Claude 3.5 Sonnet, GPT-4o, and specialized fine-tuned open-source models based on speed, cost, and analytical depth requirements.
Fallback Routing & Human Escalation
If a caller demands human support or becomes distressed, the assistant warm-transfers the live call to a designated human operator with full context.
Automated Call Evaluation (LLM-as-Judge)
Every completed call is graded against compliance checklists, sales objection handling, and lead sentiment scores.
Build Enterprise Voice AI with Vapi
Deploy low-latency voice assistants that actually execute complex tasks.
Book a Vapi Technical Walkthrough