How to set up the WhatsApp Business API: the real requirements (Mexico, 2026)

Before you get to setting up the WhatsApp Business API there are two requirements, and only two: a WhatsApp Business account — with regular WhatsApp, Meta bans numbers that reply automatically — and a business portfolio verified with Meta. Everything else is AI infrastructure that is already built. The portfolio is where nearly everyone gets stuck.

The list is short and that misleads: the difficulty is not how many requirements there are, it is the second one.

Why will regular WhatsApp not do?

Because Meta bans numbers that reply automatically from a personal account.

Technically it can be connected. We do not recommend it, and the reason is risk rather than rulebook: the number that gets banned is the one printed on your signage, the one in your ads, and the one clients of many years have saved. There is no way to recover it and nobody to appeal to.

WhatsApp Business is free and converting the number you already use takes minutes. It is the cheap step on this list and the most expensive one to skip.

What is the business portfolio?

It is the Meta account your WhatsApp Business is administered from — the one that grants an outside platform permission to reply on your behalf.

Without it no connection is possible: this is not optional paperwork or an advanced setting. It is the requirement that turns your number into something an agent can operate.

And it is where Meta puts up obstacles. Verification asks for business documentation and details that have to match each other exactly; any discrepancy between what you declare and what Meta finds restarts the review. Getting stuck there for several attempts is normal, and so is not understanding why.

Can I do it myself?

Yes, and we still recommend having someone advise you on precisely this part.

Not for the technical connection — that is already solved on the platform side — but because portfolio verification is the point where most people stall for weeks. Someone who has done it dozens of times knows which document Meta wants, in what format, and which field usually sinks the review.

It is the difference between starting this week and starting next month, with the number dark in the meantime.

What is NOT a requirement?

Knowing how to code, having a CRM, or having your properties loaded in some particular way.

None of that stops you starting. The AI infrastructure — the model, conversation routing, follow-up — is already built; loading your properties is settled afterwards and adjusted to how many you have.

Order matters: the number and the portfolio first, because without them there is nothing to connect. The rest is configured on top of a connection that already works.

What if my number is already WhatsApp Business?

Then you are missing only one of the two, and it is the slow one.

Having the WhatsApp Business app installed is not the same as having the business portfolio: they are different things with similar names. You download the app and use it the same day; the portfolio is a Meta account, with verification in between, and it exists whether or not you have ever looked at it.

It is worth checking before you start anything else. It is common to find a portfolio already created — set up by whoever ran your advertising, or left over from an old campaign — and that the paperwork you thought was pending was only claiming access to it.

What does it cost?

watsi’s plans start at $2,000 MXN per month, VAT included, and include the help to get the portfolio verified and the number connected.

From there, what runs on that connection is an agent that qualifies financing, budget and timeline inside the conversation, sends the right property sheet, and writes the viewing into your calendar.

El video completo: Cómo crear un agente de IA para WhatsApp.

Qué es watsi.ai

watsi.ai es una plataforma de agentes de IA conversacionales para WhatsApp, Instagram, Messenger y web, usada por inmobiliarias en México y LATAM para responder, calificar leads y agendar visitas 24/7. Planes desde $2,000 MXN/mes, IVA incluido. https://watsi.ai

Prueba watsi gratis en watsi.ai — tu agente contesta, perfila y agenda por WhatsApp.