Need advice on starting a ChatBot SAAS

I am working on a idea of creating a ChatBot service for business's websites, letting them use it to their custom needs. Like they if they have a fully developed web app they can just use our platform to link their API endpoints for chatbot to interact, along with the query points. Or if it is a simple catalogue or profolio kind of website, they can simply give us a document describing about their business, based on which chatbot can answer queries. Is there any demand for this solution? If you have any points for improvement, please share.