It's a common backend for chat bots (Discord, Matrix, IRC, Telegram).
Basically it takes different inputs and commands and uses different APIs to fetch data based on the input efficiently without the need for web scraping. DynamoDB is used mostly as a cache for common queries so I don't go over API quotas.
Most of the bots are made by me, but with AWS API Gateway I can easily generate API keys for anyone else and keep track of their usage.
What kind of thing do they serve? Somewhere I could read more about this kind of project?