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Andrés Matte
Dec 9, 2025
Build mini-apps inside WhatsApp [English]
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Build mini-apps inside WhatsApp [English]
Andrés Matte
·
Dec 9, 2025
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00:00
With WhatsApp, flows you can build mini apps inside WhatsApp.
00:03
and I'm going to show you how easy it is to build them.
00:06
With Kapso, what we are going to do is create a flow that allows me to schedule an appointment by connecting with the Cal.com API.
00:16
So we are going to create the flow.
00:19
This is the view where we can edit the flow.
00:21
So I have a prompt already copied from before and I will give it directly to the Kapso agent.
00:33
Here the agent is working on replacing the JSON that will give the most important parts of the flow.
00:38
And then the agent is going to create a function so that the data is dynamic and we can connect with the Cal.com API.
00:46
Now the agent is creating the function.
00:52
So here we can see that it has already created a base and we will see if it works.
00:58
I am going to fill in my email, I am going to select a date which will be Thursday.
01:08
Let's find available slots and we aim to select at 9:20am and if you notice there's an error here.
01:20
So I'm going to ask the agent to debug.
01:26
So the agent here will get the logs, it will get the function calls we use for this and he is going to fix it.
01:36
Okay, so now we are going to try it again.
01:51
Okay, now let's select the slot.
02:00
Cool.
02:01
It looks like it worked.
02:02
Now let's go check my email.
02:05
Yes, this really did work.
02:06
Indeed.
02:07
We can see that it scheduled me for 9:40 with the correct email address.
02:11
So it's working.
02:12
Now the last step is to publish it.
02:18
And it's done.
02:19
It's published.
02:20
This is ready for use on WhatsApp.
02:23
I can send it to test numbers to try it directly on my phone.
02:27
So tell me what you think.
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