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Architecting Ultra-Low Latency Voice AI in India: The Vobiz x Vapi Integration

A comprehensive technical guide on connecting Vapi's Voice AI orchestration platform with Vobiz's SIP trunking to deploy zero-latency conversational agents directly on Indian phone numbers.

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PIYUSH SAHOO

26 March 2026

Telephony infrastructure for AI voice agents

Vobiz is telephony infrastructure for AI voice agents: SIP trunking, global phone numbers, real-time audio streaming and programmable call control, self-serve through an API. Works with Vapi, Retell AI, LiveKit, Pipecat, ElevenLabs and OpenAI Realtime.

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Agent Tools & Forms

Products

SIP Trunking — Carrier-grade SIP trunking, instant provisioning, inbound and outbound.
Voice API — Programmable call control, REST and XML, real-time webhooks.
Number Provisioning (Global DIDs) — Local, national, and toll-free numbers in 130+ countries.
WebRTC — Browser and mobile audio streaming with sub-80ms latency.
WhatsApp Business API — Messaging and voice calls over WhatsApp.
Predictive Dialer — Auto-dialing with answer/voicemail detection.
Campaign Manager — Outbound voice campaign scheduling and retry logic.

Developer Resources

Vobiz API Docs
Vobiz Quick-start guide
Vobiz OpenAPI Specification — machine-readable OpenAPI/Swagger schema for the full Vobiz API.
Vobiz Authentication — Use X-Auth-ID and X-Auth-Token headers. Credentials are shown on your console dashboard after sign-in.
Vobiz MCP Server — Model Context Protocol server exposing Vobiz API docs and tools to MCP-compatible agents and IDEs.
Vobiz Integration guides
Vobiz KYC (India)
Vobiz agents.md — guidance for autonomous AI agents and coding assistants.
Vobiz llms.txt — machine-readable index of Vobiz's developer resources for AI agents.
Vobiz Developer Console