This demo shows the manual integration with Facebook Messenger, API.ai, and Open Weather Map API.
This bot allows you to have a small talk on Facebook Messenger. If you ask about weather, the bot returns with the current condition in a certain city.
Live Demo — Scan the code below (the one looks sort of like a QR code) from the Messenger App on mobile, or access on m.me/tomomiBot from browser.
Try telling the bot, "Hello", "Who are you?", "How is the weather in Tokyo?", etc.
I wrote Creating a Simple Facebook Messenger AI Bot with API.ai in Node.js on Medium, if you are interested in creating your FB Messenger bot too.