{
  "name": "ComfyUI Image Generation Pipeline",
  "nodes": [
    {
      "parameters": {
        "httpMethod": "POST",
        "path": "generate-image",
        "responseMode": "responseNode",
        "options": {}
      },
      "id": "webhook-trigger",
      "name": "Webhook Trigger",
      "type": "n8n-nodes-base.webhook",
      "typeVersion": 2,
      "position": [
        250,
        300
      ]
    },
    {
      "parameters": {
        "jsCode": "// Extract prompt from webhook body or use default\nconst input = $input.first().json;\nconst prompt = input.body?.prompt || input.prompt || 'a beautiful sunset over mountains, highly detailed, 4k';\nconst negativePrompt = input.body?.negative_prompt || input.negative_prompt || 'blurry, low quality, distorted';\nconst seed = input.body?.seed || input.seed || Math.floor(Math.random() * 1000000000);\nconst steps = input.body?.steps || input.steps || 20;\nconst cfg = input.body?.cfg || input.cfg || 7;\nconst width = input.body?.width || input.width || 512;\nconst height = input.body?.height || input.height || 512;\n\n// ComfyUI API workflow format\n// This is a basic txt2img workflow - customize as needed\nconst comfyWorkflow = {\n  "3": {\n    "inputs": {\n      "seed": seed,\n      "steps": steps,\n      "cfg": cfg,\n      "sampler_name": "euler",\n      "scheduler": "normal",\n      "denoise": 1,\n      "model": ["4", 0],\n      "positive": ["6", 0],\n      "negative": ["7", 0],\n      "latent_image": ["5", 0]\n    },\n    "class_type": "KSampler",\n    "_meta": { "title": "KSampler" }\n  },\n  "4": {\n    "inputs": {\n      "ckpt_name": "v1-5-pruned-emaonly.safetensors"\n    },\n    "class_type": "CheckpointLoaderSimple",\n    "_meta": { "title": "Load Checkpoint" }\n  },\n  "5": {\n    "inputs": {\n      "width": width,\n      "height": height,\n      "batch_size": 1\n    },\n    "class_type": "EmptyLatentImage",\n    "_meta": { "title": "Empty Latent Image" }\n  },\n  "6": {\n    "inputs": {\n      "text": prompt,\n      "clip": ["4", 1]\n    },\n    "class_type": "CLIPTextEncode",\n    "_meta": { "title": "CLIP Text Encode (Positive)" }\n  },\n  "7": {\n    "inputs": {\n      "text": negativePrompt,\n      "clip": ["4", 1]\n    },\n    "class_type": "CLIPTextEncode",\n    "_meta": { "title": "CLIP Text Encode (Negative)" }\n  },\n  "8": {\n    "inputs": {\n      "samples": ["3", 0],\n      "vae": ["4", 2]\n    },\n    "class_type": "VAEDecode",\n    "_meta": { "title": "VAE Decode" }\n  },\n  "9": {\n    "inputs": {\n      "filename_prefix": "n8n_generated",\n      "images": ["8", 0]\n    },\n    "class_type": "SaveImage",\n    "_meta": { "title": "Save Image" }\n  }\n};\n\nreturn {\n  json: {\n    prompt: comfyWorkflow,\n    original_prompt: prompt,\n    negative_prompt: negativePrompt,\n    seed: seed,\n    steps: steps,\n    cfg: cfg,\n    width: width,\n    height: height\n  }\n};"
      },
      "id": "prepare-workflow",
      "name": "Prepare ComfyUI Workflow",
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "position": [
        470,
        300
      ]
    },
    {
      "parameters": {
        "method": "POST",
        "url": "http://comfyui:8188/prompt",
        "sendBody": true,
        "specifyBody": "json",
        "jsonBody": "={{ JSON.stringify({ prompt: $json.prompt }) }}",
        "options": {}
      },
      "id": "submit-to-comfyui",
      "name": "Submit to ComfyUI",
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.2,
      "position": [
        690,
        300
      ]
    },
    {
      "parameters": {
        "jsCode": "const response = $input.first().json;\nconst promptId = response.prompt_id;\n\nif (!promptId) {\n  throw new Error('No prompt_id received from ComfyUI');\n}\n\nreturn {\n  json: {\n    prompt_id: promptId,\n    status: 'queued',\n    check_count: 0,\n    max_checks: 60,\n    ...$input.first().json\n  }\n};"
      },
      "id": "extract-prompt-id",
      "name": "Extract Prompt ID",
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "position": [
        910,
        300
      ]
    },
    {
      "parameters": {
        "amount": 2,
        "unit": "seconds"
      },
      "id": "wait-node",
      "name": "Wait 2 Seconds",
      "type": "n8n-nodes-base.wait",
      "typeVersion": 1.1,
      "position": [
        1130,
        300
      ]
    },
    {
      "parameters": {
        "url": "=http://comfyui:8188/history/{{ $json.prompt_id }}",
        "options": {}
      },
      "id": "check-history",
      "name": "Check Generation Status",
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.2,
      "position": [
        1350,
        300
      ]
    },
    {
      "parameters": {
        "jsCode": "const input = $input.first().json;\nconst promptId = $('Extract Prompt ID').first().json.prompt_id;\nconst historyData = input;\n\n// Check if our prompt_id exists in history and has outputs\nconst promptHistory = historyData[promptId];\n\nif (promptHistory && promptHistory.outputs) {\n  // Find the SaveImage node output (node 9 in our workflow)\n  const outputs = promptHistory.outputs;\n  let images = [];\n  \n  for (const nodeId in outputs) {\n    if (outputs[nodeId].images) {\n      images = images.concat(outputs[nodeId].images);\n    }\n  }\n  \n  if (images.length > 0) {\n    return {\n      json: {\n        status: 'completed',\n        prompt_id: promptId,\n        images: images,\n        image_urls: images.map(img => \n          `http://comfyui:8188/view?filename=${img.filename}&subfolder=${img.subfolder || ''}&type=${img.type || 'output'}`\n        ),\n        original_prompt: $('Extract Prompt ID').first().json.original_prompt,\n        generation_params: {\n          seed: $('Extract Prompt ID').first().json.seed,\n          steps: $('Extract Prompt ID').first().json.steps,\n          cfg: $('Extract Prompt ID').first().json.cfg\n        }\n      }\n    };\n  }\n}\n\n// Not ready yet - increment check count\nconst checkCount = ($('Extract Prompt ID').first().json.check_count || 0) + 1;\nconst maxChecks = $('Extract Prompt ID').first().json.max_checks || 60;\n\nif (checkCount >= maxChecks) {\n  throw new Error(`Generation timed out after ${maxChecks} checks`);\n}\n\nreturn {\n  json: {\n    status: 'pending',\n    prompt_id: promptId,\n    check_count: checkCount,\n    max_checks: maxChecks,\n    original_prompt: $('Extract Prompt ID').first().json.original_prompt,\n    seed: $('Extract Prompt ID').first().json.seed,\n    steps: $('Extract Prompt ID').first().json.steps,\n    cfg: $('Extract Prompt ID').first().json.cfg\n  }\n};"
      },
      "id": "check-completion",
      "name": "Check if Complete",
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "position": [
        1570,
        300
      ]
    },
    {
      "parameters": {
        "conditions": {
          "options": {
            "caseSensitive": true,
            "leftValue": "",
            "typeValidation": "strict"
          },
          "conditions": [
            {
              "id": "condition-complete",
              "leftValue": "={{ $json.status }}",
              "rightValue": "completed",
              "operator": {
                "type": "string",
                "operation": "equals"
              }
            }
          ],
          "combinator": "and"
        },
        "options": {}
      },
      "id": "if-complete",
      "name": "Generation Complete?",
      "type": "n8n-nodes-base.if",
      "typeVersion": 2,
      "position": [
        1790,
        300
      ]
    },
    {
      "parameters": {
        "respondWith": "json",
        "responseBody": "={{ JSON.stringify($json) }}",
        "options": {}
      },
      "id": "respond-success",
      "name": "Respond with Image",
      "type": "n8n-nodes-base.respondToWebhook",
      "typeVersion": 1.1,
      "position": [
        2050,
        200
      ]
    },
    {
      "parameters": {
        "amount": 2,
        "unit": "seconds"
      },
      "id": "wait-retry",
      "name": "Wait and Retry",
      "type": "n8n-nodes-base.wait",
      "typeVersion": 1.1,
      "position": [
        2050,
        400
      ]
    },
    {
      "parameters": {
        "respondWith": "json",
        "responseBody": "={{ JSON.stringify({ error: 'Generation failed', details: $json }) }}",
        "options": {
          "responseCode": 500
        }
      },
      "id": "respond-error",
      "name": "Respond with Error",
      "type": "n8n-nodes-base.respondToWebhook",
      "typeVersion": 1.1,
      "position": [
        2270,
        500
      ]
    },
    {
      "parameters": {},
      "id": "no-op",
      "name": "No Operation",
      "type": "n8n-nodes-base.noOp",
      "typeVersion": 1,
      "position": [
        2270,
        400
      ]
    }
  ],
  "connections": {
    "Webhook Trigger": {
      "main": [
        [
          {
            "node": "Prepare ComfyUI Workflow",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Prepare ComfyUI Workflow": {
      "main": [
        [
          {
            "node": "Submit to ComfyUI",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Submit to ComfyUI": {
      "main": [
        [
          {
            "node": "Extract Prompt ID",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Extract Prompt ID": {
      "main": [
        [
          {
            "node": "Wait 2 Seconds",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Wait 2 Seconds": {
      "main": [
        [
          {
            "node": "Check Generation Status",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Check Generation Status": {
      "main": [
        [
          {
            "node": "Check if Complete",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Check if Complete": {
      "main": [
        [
          {
            "node": "Generation Complete?",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Generation Complete?": {
      "main": [
        [
          {
            "node": "Respond with Image",
            "type": "main",
            "index": 0
          }
        ],
        [
          {
            "node": "Wait and Retry",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Wait and Retry": {
      "main": [
        [
          {
            "node": "Check Generation Status",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  },
  "settings": {
    "executionOrder": "v1"
  },
  "staticData": null,
  "meta": {
    "templateCredsSetupCompleted": true
  },
  "versionId": "1",
  "triggerCount": 0,
  "tags": [
    {
      "name": "ComfyUI",
      "id": "1"
    },
    {
      "name": "Image Generation",
      "id": "2"
    },
    {
      "name": "AI Stack",
      "id": "3"
    }
  ]
}