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Workflows are directed graphs where nodes execute sequentially. Each node performs a specific action—sending messages, waiting for input, routing logic, or executing code.

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Node categories

Start node - Entry point
  • Triggers when a message arrives or API calls the workflow
  • Every workflow has exactly one Start node
  • Automatically advances to the first connected node
Action nodes - Execute and continue
  • Send messages (text, templates, interactive)
  • Execute functions
  • Call other workflows
  • Transfer to human agents (handoff)
  • Execute immediately and advance to next node
Wait nodes - Pause for input
  • Halt workflow execution until user responds
  • Store response in {{last_user_input}} or custom variable
  • Resume execution when message arrives
Decide nodes - Route execution
  • Branch workflow to different paths
  • Use AI to interpret intent or custom function logic
  • Return label determines which edge to follow
Agent nodes - AI conversations
  • Multi-turn conversations with tool access
  • Can call webhooks, functions, and app integrations
  • Maintains execution at node until complete_task tool is called
  • New user messages automatically injected during conversation

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Execution flow

Workflows follow edges between nodes. Execution continues until:
  • Reaching a Wait node (pauses for user input)
  • Reaching an Agent node (remains at node until agent calls complete_task)
  • Reaching a Handoff node (stops, transfers to human)
  • No more connected nodes (workflow completes)

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Learn more

Step types

Action nodes, wait nodes, decide nodes, and agent nodes

Variables and context

Access user data and workflow state with template variables

Triggers

Start workflows from messages or API calls

Webhooks

Connect workflows to external services