Process User Signups via Webhook

The workflow JSON

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{
  "name": "Webhook Processing",
  "description": "Handle incoming webhook requests with authentication and data processing",
  "category": "api-integration",
  "difficulty": "intermediate",
  "estimatedTime": "10 minutes",
  "prerequisites": [
    "Understanding of HTTP",
    "Webhook concepts"
  ],
  "learningObjectives": [
    "Learn webhook node configuration",
    "Practice request data processing",
    "Understand webhook security"
  ],
  "nodes": [
    {
      "parameters": {
        "path": "/webhook/user-signup",
        "httpMethod": "POST",
        "authentication": "headerAuth",
        "headerName": "X-API-Key",
        "headerValue": "{{ $env.WEBHOOK_SECRET }}"
      },
      "id": "webhook-trigger",
      "name": "User Signup Webhook",
      "type": "n8n-nodes-base.webhook",
      "typeVersion": 1,
      "position": [
        240,
        300
      ]
    },
    {
      "parameters": {
        "assignments": [
          {
            "name": "userId",
            "value": "{{ $json.body.user_id || 'unknown' }}"
          },
          {
            "name": "email",
            "value": "{{ lower(trim($json.body.email || '')) }}"
          },
          {
            "name": "fullName",
            "value": "{{ trim(($json.body.first_name || '') + ' ' + ($json.body.last_name || '')) }}"
          },
          {
            "name": "signupSource",
            "value": "{{ $json.body.source || 'web' }}"
          },
          {
            "name": "requestIP",
            "value": "{{ $json.headers['x-forwarded-for'] || $json.headers['x-real-ip'] || 'unknown' }}"
          },
          {
            "name": "userAgent",
            "value": "{{ $json.headers['user-agent'] || 'unknown' }}"
          },
          {
            "name": "receivedAt",
            "value": "{{ formatDate(now(), 'yyyy-MM-dd HH:mm:ss') }}"
          }
        ]
      },
      "id": "extract-user-data",
      "name": "Extract User Data",
      "type": "n8n-nodes-base.set",
      "typeVersion": 1,
      "position": [
        460,
        300
      ]
    },
    {
      "parameters": {
        "assignments": [
          {
            "name": "isValidEmail",
            "value": "{{ regex($json.email, '^[^@]+@[^@]+\\\\.[^@]+$') }}"
          },
          {
            "name": "hasRequiredFields",
            "value": "{{ and(isNotEmpty($json.email), isNotEmpty($json.fullName), isNotEmpty($json.userId)) }}"
          },
          {
            "name": "isSuspiciousRequest",
            "value": "{{ or(isEmpty($json.requestIP), includes(lower($json.userAgent), 'bot')) }}"
          }
        ]
      },
      "id": "validate-data",
      "name": "Validate Data",
      "type": "n8n-nodes-base.set",
      "typeVersion": 1,
      "position": [
        680,
        300
      ]
    },
    {
      "parameters": {
        "conditions": [
          {
            "field": "isValidEmail",
            "operation": "equal",
            "value": true
          },
          {
            "field": "hasRequiredFields",
            "operation": "equal",
            "value": true
          },
          {
            "field": "isSuspiciousRequest",
            "operation": "equal",
            "value": false
          }
        ],
        "mode": "all"
      },
      "id": "validation-switch",
      "name": "Validation Switch",
      "type": "n8n-nodes-base.switch",
      "typeVersion": 1,
      "position": [
        900,
        300
      ]
    },
    {
      "parameters": {
        "assignments": [
          {
            "name": "status",
            "value": "success"
          },
          {
            "name": "message",
            "value": "User registration processed successfully"
          },
          {
            "name": "processedUser",
            "value": "{{ {id: $json.userId, email: $json.email, name: $json.fullName, source: $json.signupSource, processedAt: $json.receivedAt} }}"
          }
        ]
      },
      "id": "process-valid-user",
      "name": "Process Valid User",
      "type": "n8n-nodes-base.set",
      "typeVersion": 1,
      "position": [
        1120,
        200
      ]
    },
    {
      "parameters": {
        "assignments": [
          {
            "name": "status",
            "value": "error"
          },
          {
            "name": "message",
            "value": "{{ if(not($json.isValidEmail), 'Invalid email format', if(not($json.hasRequiredFields), 'Missing required fields', 'Suspicious request detected')) }}"
          },
          {
            "name": "rejectedAt",
            "value": "{{ formatDate(now(), 'yyyy-MM-dd HH:mm:ss') }}"
          }
        ]
      },
      "id": "handle-invalid-user",
      "name": "Handle Invalid User",
      "type": "n8n-nodes-base.set",
      "typeVersion": 1,
      "position": [
        1120,
        400
      ]
    }
  ],
  "connections": {
    "User Signup Webhook": {
      "main": [
        [
          {
            "node": "Extract User Data",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Extract User Data": {
      "main": [
        [
          {
            "node": "Validate Data",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Validate Data": {
      "main": [
        [
          {
            "node": "Validation Switch",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Validation Switch": {
      "main": [
        [
          {
            "node": "Process Valid User",
            "type": "main",
            "index": 0
          }
        ],
        [
          {
            "node": "Handle Invalid User",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  },
  "active": false,
  "settings": {},
  "versionId": "1"
}

About this workflow

Webhook Processing. Webhook trigger; 6 nodes.

Source: https://github.com/neul-labs/m9m/blob/main/examples/api-integration/webhook-processing.json — original creator credit. Request a take-down →

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