---
canonical: "https://www.softatlas.io/zernio/products/communication-api"
name: "Communication API"
provider: "Zernio"
category: "Developer & Engineering / Communication APIs / CPaaS (SMS, Voice & WhatsApp APIs)"
review_count: 0
ai_powered: false
website: "https://zernio.com/voice-api"
updated: "2026-10-29"
---

# Communication API

By [Zernio](/zernio.md)

An API that allows users to send WhatsApp messages, SMS, and make calls from a single number, with a unified inbox for replies.

## Features
- Enable inbound and outbound calling with a single API call
- Route incoming calls to AI agents, phones, or custom SIP URIs
- Provide browser-based calling without the need for a phone
- Record and transcribe calls automatically
- Set inbound call rules for voicemail, business hours, and call blocking
- Track call history and access call recordings
- Estimate call costs before dialing
- Subscribe to call lifecycle events via webhooks

## Built for
DEVELOPERS, CUSTOMER_SUPPORT

Source: https://www.softatlas.io/zernio/products/communication-api