For locksmiths
Answer your customers even when your hands are in a lock
A WhatsApp assistant that replies for you around the clock, takes down the job and hands it to you ready. Built so you don't lose the customer who calls while you work.
I sit down with you, learn how you actually work, and build you a tool that handles your WhatsApp when you can't. I don't invent problems that don't exist: I saw this one first-hand with a real locksmith.
The phone won't stop while you work
You're on your knees in front of a door, both hands busy, and the phone starts ringing. Pick it up and you stop the job. Leave it and that customer calls the next locksmith, and you've lost them. By mid-afternoon you've no idea how many jobs slipped away. A locksmith said exactly that to me, and the first tool I built came out of it.
What you get
Your customers get an answer right away, at any hour, and you get the job already sorted for when you can check your phone. You stay hands-on without leaving anyone hanging.
No job slips away
The assistant replies in seconds at any hour, including the small hours and weekends, and leaves the job written up for when you finish what you're holding.
It filters and hands it over ready
It asks only what matters (what's wrong, where, whether it's urgent) and passes you the contact and the reason already sorted, so you decide where to go first.
It never explains how to open a lock
I built in a safeguard made for your trade: no matter how hard someone pushes, it gives no instructions to force or open anything. Its job is to serve your customers, and it stays well clear of any explanation of how to get in.
It says it's an assistant
It makes clear it's an automated helper and passes the case to you when a person is needed. That keeps you on the right side of the EU transparency rule that applies from 2 August 2026.
How we set it up
No endless forms, no learning a new program. I do the work and leave it running on the WhatsApp you already use.
We talk about your day
You tell me what customers ask, which jobs are urgent and how you charge. I learn how you work before touching anything.
I build it with you
I set up the assistant with your answers, your prices and the way you speak, and we tune it together until it replies the way you would.
It starts answering
It goes live on your WhatsApp. You carry on with your work and check the jobs when you can. If something doesn't fit, I adjust it.
It's already working with a locksmith
I built the first assistant with a locksmith who lives this problem every day, and he uses it to keep answering customers while he works. Nearly 200 locksmiths are on a waiting list, most of them because another tradesperson told them about it. Spain has around 3.4 million self-employed workers (RETA, Social Security, Dec 2025) who know that same scene of a phone that won't stop.
«Our phones never stop ringing with questions while we work, and if you don't pick up, you lose the customer.»
Frequently asked
Do I have to change my number or install anything?
No. It runs on the WhatsApp you already use for work. You don't install or configure anything: I set it up and you just review the jobs that come in.
Will it really never explain how to open a lock?
I designed that safeguard specifically for your trade. However hard a user pushes or whatever excuse they make up, the assistant gives no instructions to force or open locks. Its job is to handle your customers' requests, and it stays well clear of any explanation of how to get in.
What happens with my customers' data?
Everything runs in Europe, on Google Vertex AI, and no conversation is used to train anyone. I work with signed data-processing agreements and in line with GDPR.
How do I start?
Try it yourself at aistant-eight.vercel.app/demo/cerrajero, then message me on WhatsApp at +34 632 402 668. I sit down with you, see how you work and we set up your assistant.
Tell me how you work and I'll build your assistant
Try the assistant at aistant-eight.vercel.app/demo/cerrajero. If it looks useful, message me on WhatsApp at +34 632 402 668 or email gaspar.garcia@fixender.com and we'll start with your daily routine.
or by email: gaspar.garcia@fixender.com