# API Reference
All generated APIs relate to the core vert.x APIs, so for better understanding one should read the vert.x manuals (opens new window) and adapt the manual imports/examples as explained in vert.x interop.
The Vert.x core APIs contain the backbone for writing Vert.x applications and low-level support for HTTP, TCP, UDP, file system, asynchronous streams and many other building blocks. It is also used by many other components of Vert.x.
A tool-kit for writing sophisticated modern web applications and HTTP microservices.
# Authentication / Authorization
Modules to perform authentication and/or authorization.
# Data Access
Modules for accessing data.
Modules to work with monitoring tools.
Microservice related modules.
# EventBus Bridges
EventBus bridge modules.
Other uncategorized modules.