Créer un workflow dans n8n via Webhook

• •Point de terminaison HTTP Webhook (généré automatiquement par n8n)
• •Peut nécessiter les informations d'identification d'authentification de l'API cible

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  "name": "Create Workflow via Webhook in n8n",
  "tags": [],
  "nodes": [
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        "content": "1. **Webhook**: it receives a POST at `/webhook/create-workflow` with the workflow JSON.\n2. **Validate JSON**: it runs code that checks the JSON has the fields `name` and `nodes`, and that each node has `id`, `name`, `type`, and `position`. It returns `{ success: true }` if everything is valid, or `{ success: false, message: \"…\" }` if there’s an error.\n3. **Validation Successful?**: it looks at the result from “Validate JSON” and, depending on whether `success` is `true` or `false`, decides to continue creating the workflow or return the error.\n"
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        "content": "1. **Validation Error**: Sets a JSON response with `success: false` and uses the incoming `$json.message` as the error message when the initial payload validation fails.\n\n2. **API Error**: Sets a JSON response with `success: false`, a fixed `message: \"Error creating workflow\"`, includes the full error payload (`error: JSON.stringify($json)`), and the HTTP `statusCode` from the failed API request.\n"
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        "content": "1. **Create Workflow**: Sends a POST to `/api/v1/workflows` with the validated workflow payload, using header-based authentication.\n2. **API Successful?**: Checks if the HTTP response status code is ≤ 299.\n3. **Success Response**: If the API call succeeded, constructs the final JSON with `success: true`, `workflowId`, `workflowName`, `createdAt`, and the workflow `url`.\n"
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    {
      "id": "c798d2a9-577d-4f46-b269-ca2b4447560c",
      "name": "Webhook",
      "type": "n8n-nodes-base.webhook",
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      "webhookId": "baad3add-f74a-447a-9764-75967674fa9f",
      "parameters": {
        "path": "create-workflow",
        "options": {},
        "httpMethod": "POST",
        "responseMode": "lastNode"
      },
      "notesInFlow": false,
      "typeVersion": 1
    },
    {
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      "name": "Valider JSON",
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        "jsCode": "// Validate the received JSON\nconst payload = $input.item.json.body;\n\n// Check that required fields exist\nif (!payload) {\n  return {\n    json: {\n      success: false,\n      message: \"No payload received in the request\"\n    }\n  };\n}\n\n// Ensure correct format for a workflow\nconst requiredFields = ['name', 'nodes'];\nfor (const field of requiredFields) {\n  if (!payload[field]) {\n    return {\n      json: {\n        success: false,\n        message: `The field '${field}' is required in the workflow`\n      }\n    };\n  }\n}\n\n// Ensure connections and settings exist\nif (!payload.connections) payload.connections = {};\nif (!payload.settings) payload.settings = {};\n\n// Verify that there is at least one node\nif (!Array.isArray(payload.nodes) || payload.nodes.length === 0) {\n  return {\n    json: {\n      success: false,\n      message: \"The workflow must have at least one node\"\n    }\n  };\n}\n\n// Validate each node's required fields\nfor (const node of payload.nodes) {\n  const nodeRequiredFields = ['id', 'name', 'type', 'position'];\n  for (const field of nodeRequiredFields) {\n    if (!node[field]) {\n      return {\n        json: {\n          success: false,\n          message: `Node '${node.name || 'unknown'}' is missing required field '${field}'`\n        }\n      };\n    }\n  }\n  \n  // Ensure parameters exists\n  if (!node.parameters) node.parameters = {};\n  if (!node.typeVersion) node.typeVersion = 1;\n}\n\n// Prepare the workflow object for the API\nconst apiWorkflow = {\n  name: payload.name,\n  nodes: payload.nodes,\n  connections: payload.connections,\n  settings: payload.settings\n};\n\n// If everything is valid, proceed\nreturn {\n  json: {\n    success: true,\n    apiWorkflow: apiWorkflow\n  }\n};"
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      "name": "Validation réussie ?",
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        "conditions": {
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            {
              "value1": "={{ $json.success }}",
              "value2": true
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      },
      "typeVersion": 1
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    {
      "id": "ef3a310b-7673-40cc-985a-4e87dc99de70",
      "name": "Créer un workflow",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
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      "parameters": {
        "url": "=http://{{ $('Webhook').item.json.headers.host }}/api/v1/workflows",
        "options": {},
        "authentication": "headerAuth"
      },
      "credentials": {
        "httpHeaderAuth": {
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          "name": "N8N"
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      "continueOnFail": true
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      "parameters": {
        "conditions": {
          "number": [
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              "value1": "={{ $response.statusCode }}",
              "value2": 299,
              "operation": "smallerEqual"
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              "value": "true"
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            {
              "name": "message",
              "value": "Workflow created successfully"
            },
            {
              "name": "workflowId",
              "value": "={{ $json.data[0].id }}"
            },
            {
              "name": "workflowName",
              "value": "={{ $json.data[0].name }}"
            },
            {
              "name": "createdAt",
              "value": "={{ $json.data[0].createdAt }}"
            },
            {
              "name": "url",
              "value": "=http://localhost:5678/workflow/{{ $json.data[0].id }}"
            }
          ]
        },
        "options": {}
      },
      "typeVersion": 1
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              "value": "false"
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              "value": "Error creating workflow"
            },
            {
              "name": "error",
              "value": "={{ JSON.stringify($json) }}"
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            {
              "name": "statusCode",
              "value": "={{ $response.statusCode }}"
            }
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        },
        "options": {}
      },
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  "active": true,
  "pinData": {
    "Webhook": [
      {
        "json": {
          "body": {
            "name": "Workflow Created by ID mchujUnGa9RKf7dO",
            "nodes": [
              {
                "id": "start-node",
                "name": "Start",
                "type": "n8n-nodes-base.manualTrigger",
                "position": [
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                  100
                ],
                "parameters": {},
                "typeVersion": 1
              },
              {
                "id": "set-node",
                "name": "Set",
                "type": "n8n-nodes-base.set",
                "position": [
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                  100
                ],
                "parameters": {
                  "values": {
                    "string": [
                      {
                        "name": "message",
                        "value": "This workflow was created using the webhook in mchujUnGa9RKf7dO!"
                      }
                    ]
                  }
                },
                "typeVersion": 1
              }
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            "settings": {},
            "connections": {
              "Start": {
                "main": [
                  [
                    {
                      "node": "Set",
                      "type": "main",
                      "index": 0
                    }
                  ]
                ]
              }
            }
          },
          "query": {},
          "params": {},
          "headers": {
            "host": "127.0.0.1:5678",
            "connection": "keep-alive",
            "content-type": "application/json",
            "transfer-encoding": "chunked"
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          "webhookUrl": "http://localhost:5678/webhook/create-workflow",
          "executionMode": "production"
        }
      }
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    "executionOrder": "v1"
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