# Node reference

> Reference for the nodes available in Flow, including built-in nodes and connector nodes.

This section is a reference for the nodes you place on the Flow canvas. It groups the built-in nodes that ship with Flow and the connector nodes that integrate with external systems.

The reference entries describe what each node does, its inputs and outputs, and its configuration.

These are the node reference categories:

* [Built-in nodes](./flow-built-in-nodes.md)
* [Connector nodes](./integration-nodes.md)