AI System Prompt Generator & Optimizer (n8n + Openai)

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 →

{
  "meta": {
    "templateCredsSetupCompleted": true
  },
  "nodes": [
    {
      "id": "8f16c045-53e2-4405-9053-7dd634d6e82f",
      "name": "Sticky Note33",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
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      ],
      "parameters": {
        "width": 400,
        "height": 752,
        "content": "## \u2699\ufe0f Setup Instructions\n\n### 1\ufe0f\u20e3 Set Up OpenAI Connection\n1. Go to [OpenAI Platform](https://platform.openai.com/api-keys)  \n2. Navigate to [OpenAI Billing](https://platform.openai.com/settings/organization/billing/overview)  \n3. Add funds to your billing account  \n4. Copy your API key into the **OpenAI credentials** in n8n  \n\n\n\n## \ud83d\udcec Contact Information\nNeed help customizing this workflow or building similar automations?\n\n\ud83d\udce7 [robert@ynteractive.com](mailto:robert@ynteractive.com)  \n\ud83d\udd17 [Robert Breen](https://www.linkedin.com/in/robert-breen-29429625/)  \n\ud83c\udf10 [ynteractive.com](https://ynteractive.com)\n"
      },
      "typeVersion": 1
    },
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      "position": [
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      "parameters": {
        "color": 7,
        "width": 1104,
        "height": 752,
        "content": "# \ud83d\udee0\ufe0f AI System Prompt Generator & Optimizer (n8n + OpenAI)\n\nThis workflow acts as a **System Prompt Optimizer Agent**.  \nYou send it a draft prompt or goal, and it returns:  \n1. A rewritten **optimized system prompt** that is clear, specific, and actionable.  \n2. A recommendation for the **best OpenAI model** to use based on reasoning needs, complexity, and latency/cost tradeoffs.  \n\n"
      },
      "typeVersion": 1
    },
    {
      "id": "39899c3c-ec7e-4598-873a-0172a79db705",
      "name": "OpenAI Chat Model10",
      "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
      "position": [
        -1040,
        9040
      ],
      "parameters": {
        "model": {
          "__rl": true,
          "mode": "list",
          "value": "gpt-5",
          "cachedResultName": "gpt-5"
        },
        "options": {}
      },
      "credentials": {
        "openAiApi": {
          "name": "<your credential>"
        }
      },
      "typeVersion": 1.2
    },
    {
      "id": "b325fa59-0b59-4535-a0a9-7f3be237044f",
      "name": "Sticky Note35",
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      "position": [
        -1152,
        8864
      ],
      "parameters": {
        "color": 3,
        "width": 288,
        "height": 304,
        "content": "### 1\ufe0f\u20e3 Set Up OpenAI Connection\n1. Go to [OpenAI Platform](https://platform.openai.com/api-keys)  \n2. Navigate to [OpenAI Billing](https://platform.openai.com/settings/organization/billing/overview)  \n3. Add funds to your billing account  \n4. Copy your API key into the **OpenAI credentials** in n8n  "
      },
      "typeVersion": 1
    },
    {
      "id": "fae4be3e-f184-490e-bd98-4108ac657d5f",
      "name": "Simple Memory2",
      "type": "@n8n/n8n-nodes-langchain.memoryBufferWindow",
      "position": [
        -688,
        9024
      ],
      "parameters": {},
      "typeVersion": 1.3
    },
    {
      "id": "12da8616-e4ac-4a4d-8e3b-0387a4c3748f",
      "name": "AI Prompt Generator",
      "type": "@n8n/n8n-nodes-langchain.agent",
      "position": [
        -976,
        8672
      ],
      "parameters": {
        "options": {
          "systemMessage": "You are a System Prompt Optimizer.  \nYour job is to take a user\u2019s goal or draft prompt and return an optimized system prompt that is clear, specific, and actionable.  \n\n### Rules:\n- Always rewrite the input into a polished, professional **system prompt**.  \n- Ensure the system prompt includes explicit rules, roles, and constraints where useful.  \n- Make it concise but detailed enough to remove ambiguity.  \n- Recommend the **best OpenAI model** to use for this prompt, based on complexity, reasoning needs, and latency/cost tradeoffs.  \n"
        },
        "hasOutputParser": true
      },
      "typeVersion": 2.2
    },
    {
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      "name": "Sticky Note36",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
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      ],
      "parameters": {
        "color": 3,
        "width": 288,
        "height": 304,
        "content": "### example question\n\nI need a system prompt for an agent that summarizes meeting transcripts into 3 bullet points for executives.\n  "
      },
      "typeVersion": 1
    },
    {
      "id": "a5c3ebce-f05b-4985-96ef-b98b8db66a22",
      "name": "Chat Message",
      "type": "@n8n/n8n-nodes-langchain.chatTrigger",
      "position": [
        -1440,
        8880
      ],
      "parameters": {
        "options": {}
      },
      "typeVersion": 1.3
    }
  ],
  "connections": {
    "Chat Message": {
      "main": [
        [
          {
            "node": "AI Prompt Generator",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Simple Memory2": {
      "ai_memory": [
        [
          {
            "node": "AI Prompt Generator",
            "type": "ai_memory",
            "index": 0
          }
        ]
      ]
    },
    "AI Prompt Generator": {
      "main": [
        []
      ]
    },
    "OpenAI Chat Model10": {
      "ai_languageModel": [
        [
          {
            "node": "AI Prompt Generator",
            "type": "ai_languageModel",
            "index": 0
          }
        ]
      ]
    }
  }
}

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.

• openAiApi

About this workflow

This workflow acts as a System Prompt Optimizer Agent. You send it a draft prompt or goal, and it returns: A rewritten optimized system prompt that is clear, specific, and actionable. A recommendation for the best OpenAI model to use based on reasoning needs, complexity, and…

Source: https://n8n.io/workflows/7606/ — original creator credit. Request a take-down →

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