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Vobiz is a developer-first communications platform. One account and one API give you programmable voice, SIP trunking, SMS, MMS and RCS messaging, the WhatsApp Business API, and native integrations with AI voice platforms, in 130+ countries with pay-as-you-go pricing.

Voice and SIP trunking

Place and control calls, script call flows with VobizXML, run conferences and campaigns, and connect your PBX or carrier over SIP.

SMS, MMS and RCS

Send and receive text, media and rich RCS messages, run broadcasts, and register for US 10DLC, toll-free and India DLT.

WhatsApp Business API

Send template, media and interactive messages, manage channels and conversations, and take WhatsApp calls.

AI voice agents

Put Vapi, Retell AI, ElevenLabs, LiveKit, Pipecat and more on real phone numbers over SIP or WebSocket streaming.

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Start here

Make your first call

Place an outbound call and play a message in about five minutes.

Send your first SMS

Send a message from your number and track its delivery.

Buy a phone number

Find, buy and route a number in the console or by API.

Build an AI voice agent

Connect a phone number to your AI agent end to end.

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How the API works

All Vobiz APIs are served from one host:
Base URL
Each product has its own path under that host: Authenticate every request with your Auth ID and Auth Token in the X-Auth-ID and X-Auth-Token headers. Find both on the Vobiz Console dashboard, and see Authentication for common 401 causes. For status codes across the platform, see Error handling.

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What you can build

  • AI voice agents - answer and place calls with Vapi, Retell AI, ElevenLabs, LiveKit, Pipecat, Sarvam or your own model over SIP or WebSocket audio streaming.
  • Outbound dialers and campaigns - call lists at a controlled rate with the campaign manager, with CPS and concurrency you can size and buy.
  • IVR and call routing - build menus with VobizXML, DTMF and speech input, transfers and conferences.
  • Contact centres - inbound routing, call recording, call records and live call control.
  • Notifications and two-way messaging - OTPs, alerts and reminders over SMS, MMS and RCS with delivery tracking, replies and opt-out handling.
  • WhatsApp journeys - templates, campaigns and a shared inbox on the WhatsApp Business API.
  • Platforms for your customers - give each customer their own numbers, balance and limits with sub-accounts or the Partner API.

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APIs by product

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Voice and SIP

Calls

Make, transfer, record and control live calls.

VobizXML

Script call flows: speak, play, gather, dial, record, stream.

Conferences

Run multi-party calls and manage members.

Audio streams

Stream live call audio over WebSocket in both directions.

Recordings

List, fetch and delete call and conference recordings.

Call detail records

Search, retrieve and export call records.

SIP trunking

Trunks, credentials, IP access control and origination URIs.

Applications and endpoints

Answer URLs for your numbers and SIP endpoints for softphones.

Campaign manager

Outbound voice campaigns with agents, caller pools and controls.

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Messaging

SMS, MMS and RCS

Messages, broadcasts, conversations, opt-outs and webhooks.

Messaging compliance

US 10DLC brands and campaigns, toll-free verification, India DLT.

WhatsApp Business API

Messages, templates, campaigns, conversations and calls.

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Account and numbers

Account and balance

Account details, balance, transactions and capacity.

Phone numbers

Search, buy, assign and release numbers.

Sub-accounts

Separate credentials, balance and numbers per team or customer.

Partner API

Create and manage customer accounts as a reseller.

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AI voice integrations

Connect Vobiz to the AI voice platform you already use. See all integrations.

Vapi

Retell AI

ElevenLabs

LiveKit

Pipecat

Sarvam

Bolna

Dograh

Rapida AI

Ultravox

Smallest AI

Agora

xAI

OpenAI Realtime

Gemini Live

Deepgram

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SDKs and developer tools

Official SDKs for Python, Node.js, Go, Java, Ruby, C# and PHP cover voice, numbers, SIP trunking, accounts and messaging.

OpenAPI specification

The machine-readable API contract.

MCP server

Let Claude, Cursor and other MCP clients search these docs live.

Agent Skills

Install the 15 Vobiz skills into your coding agent.

Developer Console

Create an account and manage your credentials.

GitHub

SDKs, examples and reference applications.

API status

Service availability and incident history.

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Learn more

Core concepts

SIP trunking, WebSockets, callbacks, IP whitelisting and more.

Best practices

Number utilisation, DLT registration and capacity planning.

FAQ

Concurrency, CPS, integrations, number series and support.

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Frequently asked questions

Vobiz is a developer-first communications platform with programmable voice, SIP trunking, SMS, MMS and RCS messaging, the WhatsApp Business API, real-time audio streaming and native AI voice agent integrations, available in 130+ countries with pay-as-you-go pricing.
Every Vobiz API is served from https://api.vobiz.ai. Voice, numbers, SIP trunking and account APIs live under /api/v1, SMS, MMS and RCS under /api/v1/sms, WhatsApp under /api/v1/messaging, and the Partner API under /api/v1/partner. Authenticate every request with the X-Auth-ID and X-Auth-Token headers.
Sign up at console.vobiz.ai, copy your Auth ID and Auth Token, buy a phone number, then POST to https://api.vobiz.ai/api/v1/Account/{auth_id}/Call/ with from, to and answer_url. Full steps are in the Quick Start.
POST to https://api.vobiz.ai/api/v1/sms/messages with from (one of your messaging numbers), to (a list of E.164 numbers), channel: "sms" and text. US numbers need 10DLC or toll-free registration, and messages to India need your DLT IDs. Full steps are in Send your first SMS.
Vapi, Retell AI, ElevenLabs, LiveKit, Pipecat, Sarvam, Bolna, Dograh, Rapida AI, Ultravox, Smallest AI, Agora, xAI, OpenAI Realtime, Gemini Live and Deepgram, over SIP trunking or bidirectional WebSocket audio streaming. See Integrations.
Python, Node.js, Go, Java, Ruby, C# and PHP. Each SDK covers voice, numbers, SIP trunking, accounts and messaging. The REST API works with any language that can make HTTP requests.
Yes. Vobiz is available in 130+ countries with local phone numbers and low-latency infrastructure. India-specific features such as TRAI compliance, DLT, INR billing and GST invoices are available for Indian accounts.