Could you help me to integrate chatbot with payment gateway.
For example when click on “Pay by credit” button, open popup window within facebook messenger then redirects me to payment page.
like: tap2pay NOTE that, I don’t ask about specif payment gateway, but my question I need any hint about acheive this scenario.
You will need to implement that in your front-end. You cannot do it in Rasa X.
And don’t use Rasa Buttons, those are made for sending intents. Use your own Custom Output Payload to make a special button which contains whatever information you want.
The rest depends on your programming skills and is unrelated to Rasa. Good luck 
@GhadyAlhamad Hi, if you have payment page, you can payload that url with the intents, and that’s url can be shown in the chatbot screen. I don’t know how it will be shown on the FB, but using rasa open source or rasa x you can render URL links. I hope this idea will help you, for your use case.