Event block
The entry point for a flow: which user or system events trigger execution, what payload and context are available, and how this block wires into the rest of your automation.
Action group block
A container that runs an ordered set of actions together—messages, assignments, integrations—so you can reuse, reorder, and reason about steps as one unit.
API block
Calls external HTTP endpoints with configurable method, headers, and body; maps responses into variables and handles errors or timeouts in line with your scenario.