Valid AI Agent Workflow

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": "Valid AI Agent Workflow",
  "nodes": [
    {
      "id": "a1000000-0000-0000-0000-000000000001",
      "name": "Chat Trigger",
      "type": "n8n-nodes-base.webhook",
      "typeVersion": 2,
      "position": [
        240,
        300
      ],
      "parameters": {
        "path": "chat",
        "responseMode": "lastNode"
      }
    },
    {
      "id": "a1000000-0000-0000-0000-000000000002",
      "name": "AI Agent",
      "type": "@n8n/n8n-nodes-langchain.agent",
      "typeVersion": 1,
      "position": [
        460,
        300
      ],
      "parameters": {
        "systemMessage": "You are a helpful assistant.",
        "options": {}
      }
    },
    {
      "id": "a1000000-0000-0000-0000-000000000003",
      "name": "OpenAI Chat Model",
      "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
      "typeVersion": 1,
      "position": [
        460,
        480
      ],
      "parameters": {
        "model": "gpt-4o-mini",
        "options": {}
      },
      "retryOnFail": true,
      "credentials": {
        "lmChatOpenAiApi": {
          "name": "<your credential>"
        }
      }
    },
    {
      "id": "a1000000-0000-0000-0000-000000000004",
      "name": "Window Buffer Memory",
      "type": "@n8n/n8n-nodes-langchain.memoryBufferWindow",
      "typeVersion": 1,
      "position": [
        640,
        480
      ],
      "parameters": {
        "sessionKey": "={{ $json.sessionId }}",
        "contextWindowLength": 10
      }
    }
  ],
  "connections": {
    "Chat Trigger": {
      "main": [
        [
          {
            "node": "AI Agent",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "OpenAI Chat Model": {
      "ai_languageModel": [
        [
          {
            "node": "AI Agent",
            "type": "ai_languageModel",
            "index": 0
          }
        ]
      ]
    },
    "Window Buffer Memory": {
      "ai_memory": [
        [
          {
            "node": "AI Agent",
            "type": "ai_memory",
            "index": 0
          }
        ]
      ]
    }
  },
  "settings": {},
  "staticData": null
}

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.

• lmChatOpenAiApi

About this workflow

Valid AI Agent Workflow. Uses agent, lmChatOpenAi, memoryBufferWindow. Webhook trigger; 4 nodes.

Source: https://github.com/AutomateLab-tech/n8n-mcp/blob/main/eval/workflows/valid-ai-agent.json — original creator credit. Request a take-down →

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