Build on voice infrastructure
REST APIs, webhooks, custom tools, and multi-engine sync. Integrate VirtualCall.AI into your product or automate agent deployment from CI.
Agent API
Create, update, and sync agents to VAPI, Retell, and other engines programmatically.
Webhooks
Real-time call events, transcripts, tool executions, and cost data.
Custom tools
Define JSON-schema tools that agents invoke mid-call against your backend.
API keys & tenants
Multi-tenant isolation with scoped credentials per organization.
Documentation
Guides for prompts, compliance, integrations, and cost optimization.
API surface
POST/api/agentsCreate and sync voice agents
GET/api/callsList call history and transcripts
POST/api/webhooks/retellRetell call events & billing
POST/api/contactLead capture from marketing forms
Need a sandbox tenant?
We'll provision a dev environment with sample agents and webhook logging.