AI Agent with Human Approval (gatewerk)

The workflow JSON

Copy or download the full n8n JSON below. Paste it into a new n8n workflow, add your credentials, activate. Full import guide →

{
  "name": "AI Agent with Human Approval (Gatewerk)",
  "nodes": [
    {
      "parameters": {
        "httpMethod": "POST",
        "path": "ai-agent-with-approval",
        "responseMode": "responseNode",
        "options": {}
      },
      "id": "trigger",
      "name": "Webhook Trigger",
      "type": "n8n-nodes-base.webhook",
      "typeVersion": 2,
      "position": [
        240,
        300
      ]
    },
    {
      "parameters": {
        "model": "gpt-4o-mini",
        "options": {
          "systemMessage": "You are a customer-service drafting agent. Given an incoming request, draft a polite reply. Output JSON: {\"subject\":\"...\",\"body\":\"...\"}"
        }
      },
      "id": "agent",
      "name": "AI Agent (Draft Reply)",
      "type": "@n8n/n8n-nodes-langchain.agent",
      "typeVersion": 1.6,
      "position": [
        460,
        300
      ]
    },
    {
      "parameters": {
        "template": "email-review",
        "payload": "={{ $json.output }}",
        "priority": "normal",
        "actions": [
          "approve",
          "reject",
          "edit"
        ],
        "timeoutAction": "expire",
        "timeoutSeconds": 86400,
        "additionalOptions": {
          "waitTimeoutMinutes": 1440
        },
        "resource": "review",
        "operation": "sendAndWait"
      },
      "id": "gatewerk-review",
      "name": "Gatewerk: Request Review",
      "type": "n8n-nodes-gatewerk.gatewerk",
      "typeVersion": 1,
      "position": [
        680,
        300
      ],
      "credentials": {
        "gatewerkApi": {
          "name": "<your credential>"
        }
      }
    },
    {
      "parameters": {
        "conditions": {
          "options": {
            "caseSensitive": true,
            "typeValidation": "strict"
          },
          "conditions": [
            {
              "leftValue": "={{ $json.outcome }}",
              "rightValue": "approved",
              "operator": {
                "type": "string",
                "operation": "equals"
              }
            }
          ],
          "combinator": "and"
        }
      },
      "id": "branch",
      "name": "Approved?",
      "type": "n8n-nodes-base.if",
      "typeVersion": 2,
      "position": [
        900,
        300
      ]
    },
    {
      "parameters": {
        "fromEmail": "agent@example.com",
        "toEmail": "={{ $('Webhook Trigger').item.json.body.recipient }}",
        "subject": "={{ $('Gatewerk: Request Review').item.json.editedPayload?.subject ?? $('AI Agent (Draft Reply)').item.json.output.subject }}",
        "text": "={{ $('Gatewerk: Request Review').item.json.editedPayload?.body ?? $('AI Agent (Draft Reply)').item.json.output.body }}",
        "options": {}
      },
      "id": "send-email",
      "name": "Send Email (Approved)",
      "type": "n8n-nodes-base.emailSend",
      "typeVersion": 2.1,
      "position": [
        1120,
        220
      ]
    },
    {
      "parameters": {
        "respondWith": "text",
        "responseBody": "Reply rejected by reviewer; no email sent.\nFeedback: {{ $json.feedback || 'no feedback provided' }}"
      },
      "id": "respond-rejected",
      "name": "Respond (Rejected)",
      "type": "n8n-nodes-base.respondToWebhook",
      "typeVersion": 1.1,
      "position": [
        1120,
        380
      ]
    }
  ],
  "connections": {
    "Webhook Trigger": {
      "main": [
        [
          {
            "node": "AI Agent (Draft Reply)",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "AI Agent (Draft Reply)": {
      "main": [
        [
          {
            "node": "Gatewerk: Request Review",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Gatewerk: Request Review": {
      "main": [
        [
          {
            "node": "Approved?",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Approved?": {
      "main": [
        [
          {
            "node": "Send Email (Approved)",
            "type": "main",
            "index": 0
          }
        ],
        [
          {
            "node": "Respond (Rejected)",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  },
  "settings": {
    "executionOrder": "v1"
  },
  "meta": {
    "description": "AI agent drafts a customer reply, a human reviews it via Gatewerk's webhook-wait, and the workflow either sends the (possibly edited) email or returns the rejection feedback. Replace the gatewerkApi credential id with your Gatewerk API credential and create an `email-review` template in your Gatewerk project before running.",
    "templateCredsSetupCompleted": false
  },
  "tags": [
    {
      "name": "ai-agents"
    },
    {
      "name": "human-in-the-loop"
    },
    {
      "name": "gatewerk"
    }
  ]
}

Credentials you'll need

Each integration node will prompt for credentials when you import. We strip credential IDs before publishing — you'll add your own.

• gatewerkApi

About this workflow

AI Agent with Human Approval (Gatewerk). Uses agent, n8n-nodes-gatewerk, emailSend. Webhook trigger; 6 nodes.

Source: https://github.com/gatewerk/gatewerk/blob/master/packages/n8n-nodes-gatewerk/templates/ai-agent-with-approval.json — original creator credit. Request a take-down →

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