An AI agent on official WhatsApp, a CRM and payments in one system, delivered in 10 days for a disability tax-exemption car dealer
A company that sells cars with tax exemptions for people with disabilities was handling everything by hand on WhatsApp. Customer service moved to an AI agent on Meta's official API, with a CRM, payments and sales tracking in the same system.
- Client
- CSS Digital
- Who did it
- Lucas Barreto
- See the live work
- cssdigital.com.br
01
Problem
Every lead arrived on WhatsApp with the same questions about the tax exemptions, and answering, following up and collecting payment all depended on one person. There was no sales pipeline, no follow-up reminders and no way to know which ad had brought in a sale. The website lived on a visual builder, outside the company's server.
02
Solution
A single system on the company's own server: an AI agent on official WhatsApp that answers questions without promising approval and hands a summarized case to the owner; a panel to edit what the bot knows, pause it and take over the conversation; a CRM with pipeline, history and reminders; payment links with automatic confirmation; automatic follow-ups, in the sequence the owner sets, for people who stopped replying; a secure link for customers to send medical reports and documents; and sales tracking from click to payment. The website was moved to the same server, and the code sits in a repository in the client's name, with a video manual for every feature.
03
Result
System delivered in 10 days, from October 6 to October 16, 2026. The new website scored 96 and 97 on mobile Lighthouse, 100 on desktop and 100 for accessibility, best practices and SEO.
“Excelente profissional, rápido e dinâmico.”