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WhatsApp Business Calling: where conversations meet voice

Turn WhatsApp into a full voice channel. Support.Monster brings the WhatsApp Business Calling API to your team — and our engineers integrate it with your CRM, tune the AI behind it, and keep it running.

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What is the WhatsApp Business Calling API?

The WhatsApp Business Calling API is Meta's official voice extension to the WhatsApp Business Platform. It lets businesses make and receive voice calls inside the same WhatsApp thread customers already use to message — with no separate phone line, no app switching and no carrier charge on incoming calls.

Support.Monster is a Meta Business Partner, so we handle the application, verification and configuration end to end. Once your verified WhatsApp number is connected, customers tap the call icon in WhatsApp to reach you, and you can call them back with consent — with your verified business name on display rather than an unknown number.

Why add WhatsApp Business Calling to your support?

Messaging is fast, but some problems only get solved out loud. Calling inside WhatsApp gives you both without pushing customers off the app, into a phone tree, or onto an unknown number they will not answer.

$0
Carrier cost on every call your customer starts
1
Number for chat, voice notes and calls — the one they already have
24/7
Voice coverage, with AI answering the hours nobody is on shift
2B
People already have the app your support runs on — nothing to download
MANAGED AI SUPPORT OPERATIONS

The API is the easy part. Running it isn't.

Anyone can switch calling on. Making it resolve real problems means connecting your systems, training the agent on your own calls and watching it every week. That is what our engineers do.

Wired into your CRM

Calls, recordings and outcomes land in Salesforce, Zendesk, Genesys or whatever you run — not in a separate dashboard nobody opens.

Tuned to your accents

Transcription trained against how your customers actually speak, in their own language, rather than a generic model that fails on the first call.

Handed off cleanly

When the AI should stop, your agent picks up mid-call with the full history — the customer never starts over.

Frequently asked questions

What is the WhatsApp Business Calling API?

It's Meta's official voice extension to the WhatsApp Business Platform. It lets businesses make and receive voice calls inside the same WhatsApp thread customers already use to message — no separate phone line, no app switching, and no carrier charge on incoming calls.

Do we need our own Meta Business verification to use it?

No — Support.Monster is a Meta Business Partner, so we handle the application, verification and configuration end to end. Once your verified WhatsApp number is connected, customers just tap the call icon in WhatsApp to reach you.

Does calling work on our existing WhatsApp Business number?

Yes. Voice runs on the same verified number your customers already message, with your verified business name on display rather than an unknown number.

Can calls connect to our CRM or helpdesk?

Yes — our engineers wire calls, recordings and outcomes into Salesforce, Zendesk, Genesys or whatever you already run, instead of leaving them in a separate dashboard nobody opens.

Does transcription handle our customers' accents and languages?

Yes. We tune transcription against how your customers actually speak, in their own language, rather than relying on a generic model.

Can a human agent take over a call from the AI?

Yes. When the AI should stop, your agent picks up mid-call with the full history in view, so the customer never has to start over.

Add voice to your WhatsApp support

Book a 30-minute review and we'll scope what calling looks like on your number, with your systems.

Book a deployment review