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Courses/Production agents with LangGraph and n8n/n8n as a tools layer
Lesson

n8n as a tools layer

n8n shines when you need to connect things: Gmail, forms, spreadsheets, CRMs, webhooks, and APIs. Use it as the agent's hands, not as a black box that decides everything without control.

  • Design n8n as an integration layer for agents.
  • Separate triggers, tools, approvals, and logs.
  • Prepare a workflow compatible with local or cloud models.

Base workflow in n8n

TerminalCode
Webhook o Email Trigger
  -> Normalizar entrada
  -> AI Agent o HTTP Request a LangGraph
  -> Switch por riesgo
  -> Crear borrador / pedir aprobación / rechazar
  -> Guardar log
  -> Notificar resultado

Tool contracts

Each tool must define input, output, and limits. Example:

TerminalCode
tool: create_email_draft
input:
  to: email
  subject: string
  body: string
output:
  draft_id: string
forbidden:
  - send_without_approval
  - attach_private_files
State, memory, and controlled loopsHuman approvals and permissions