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Python 3 Flask Whatsapp Web API Example to Build Whatsapp Bot to Send Messages & Files in Browser
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Jun 3, 2025
Get the full source code of application here:
View Video Transcript
0:00
uh hello guys uh welcome to this video
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So in this video I will show you how to
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build out a WhatsApp bot which can
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actually automatically send messages for
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you using a flask web application So for
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this we are using this API I have given
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the link in the description of this
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video So first of all you just need to
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create a free account here After
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creating a free account you can login
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with your Google account and then it
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will grant you with 150 messages free
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messages You can try out this free
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API It will give you 150
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messages and uh it will give you your
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token as well I have already created
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this So this will be your token So just
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link with your own I've already linked
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in with my mobile number WhatsApp number
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So you just need to link it and just
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create a simple channel So I am there
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inside this So let me build out a flash
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cap
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So let me just show you the application
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that we will be building here So this
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will be a simple web application which
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will actually contain this two input
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fields where you will write the number
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and actually the message and there is a
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send button out there So it's actually a
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web application as you can see it is
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running on local host and here you will
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input the number of the user to which
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you are sending out the
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message So followed by the message and
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now as I click the send button you will
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basically see it will make the response
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to the API and the response will be
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returned to us Message
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sent And if I show you WhatsApp web you
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will see this message is automatically
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sent to to this phone number As you can
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see it's a WhatsApp
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bot So we input the number we input the
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actual message that needs to be sent So
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again if I repeat
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this and
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uh again if I click send here you will
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see again the message will be sent
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automatically you will see that So it's
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a simple WhatsApp bot kind of a
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application inside flask I will show you
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how to get started here step by step So
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first of all just create a simple
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account here I've already created this
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login with your Google account and it
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will give you this 150 free
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messages So after that you need to
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create a flask
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application So all the source code I
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have given in the description of the
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video So first of all just
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Make a simple app py file and after
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that you need to import the flask from
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that import flask and uh the request
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module and the
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JSON and also render
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template And then we also need the
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request module as well to actually make
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the request to the API And then we'll be
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initializing the new flask app like
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this And then here we need to specify
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the a API token So this API token it
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will be giving So simply copy this from
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here Once you create the account the
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token will be assigned to you So you
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need to use the token After that
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uh we will have this hook here which
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will
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be I have given all this script in the
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description of the video So if you need
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the full
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script the link is given in the
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description you can directly copy paste
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the full overall
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script So inside this web hook we will
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be listening for all the messages which
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will be coming
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So data request
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JSON So this is essentially we are
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listening it's kind of a hook where we
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are listening for any sort of messages
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which will be coming right here inside
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this
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hook So received message So if someone
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sends you a message then this will be
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printed
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out But for this application we just
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need a simple index.html file where we
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allow the user to input the message So
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here we are loading this index.html So
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right in the templates
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folder in the flags we will create this
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index html file And right here we will
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allow the user
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to having a simple
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form where inside the form we will have
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two input fields for entering the phone
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number and actually the actual message
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and we have will be having a button So
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this will be a simple form uh if I try
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to run the application now by going to
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localhost So now it will look something
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like this This is will be a form So when
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you submit the form right here you just
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need to
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write make a simple fetch request a post
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request So write in the JavaScript
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just after the body So right here we are
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making this post request fetch request
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slash
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send It's a post request So we are
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sending this data which is these to and
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body So now we just need to make this
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post
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request inside your Python file
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So so right in this post request inside
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slash send just after
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this we are getting the data that is
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submitted through the form
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here to body everything and then now we
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here we are calling this function which
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is send response So now we just need to
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define this function which is send
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response which will get
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executed which will be responsible for
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sending the WhatsApp message So
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send response and uh to and
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body So right here making a
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simple request to the API
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https
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gate So we will providing the payload
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which will be the two values the two
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And then we also be passing the headers
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which will contain the API
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token and
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then our response will be sent So as
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soon as the response is sent our message
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will also be
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sent like this
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So this completes the application
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So if I just show you the application
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Now if
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I enter a 10digit mobile number then I
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enter my message Click on send Now you
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will see message will be sent And if I
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check now you will
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see your message is successfully sent So
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in this way guys you can build out a
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simple WhatsApp web bot kind of a bot
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which can where you can actually send
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messages automatically using this API
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So first of all you need to create an
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account here It will give you 150 free
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messages and uh after that you just need
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to subscribe to their API to get more
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messages As you can see I've used up six
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messages out of 150 So when you sign up
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you will get this
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free token free messages as well So
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there is some limitations to it as well
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So you can upgrade the if you want the
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unlimited access So thank you very much
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for watching this video and also check
9:16
out my website freemediatools.com
9:20
uh which contains uh thousands of tools
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