Workflow: HTTP Cron Automation

{
    "id": 3,
    "name": "NameCheap Dynamic DNS (DDNS)",
    "nodes": [
        {
            "name": "Cron",
            "type": "n8n-nodes-base.cron",
            "position": [
                380,
                300
            ],
            "parameters": {
                "triggerTimes": {
                    "item": [
                        {
                            "mode": "everyX",
                            "unit": "minutes",
                            "value": 15
                        }
                    ]
                }
            },
            "typeVersion": 1
        },
        {
            "name": "Checks IP if new",
            "type": "n8n-nodes-base.function",
            "position": [
                740,
                300
            ],
            "parameters": {
                "functionCode": "const staticData = getWorkflowStaticData('global');\nconst newItem = items.map(item => item.json[\"ip\"]);\nconst ildItem = staticData.ildItem; \n\nif (!ildItem) {\n  staticData.ildItem = newItem;\n  return items;\n}\n\n\nconst actualnewItem = newItem.filter((id) => !ildItem.includes(id));\nconst actualItem = items.filter((data) => actualnewItem.includes(data.json['ip']));\nstaticData.ildItem = [...actualnewItem, ...ildItem];\n\nreturn actualItem;"
            },
            "typeVersion": 1
        },
        {
            "name": "subdomains",
            "type": "n8n-nodes-base.function",
            "position": [
                1100,
                300
            ],
            "parameters": {
                "functionCode": "items[0].json = {\n    value: [\n        {id: \"subdomain1\"},\n        {id: \"subdomain2\"},\n        {id: \"subdomain3\"}\n    ]\n};\nreturn items;"
            },
            "typeVersion": 1
        },
        {
            "name": "Loops trough Subdomain list",
            "type": "n8n-nodes-base.function",
            "position": [
                1280,
                300
            ],
            "parameters": {
                "functionCode": "const newItems = [];\n\nfor (const item of items[0].json.value) {\n  newItems.push({json: item});\n}\n\nreturn newItems;"
            },
            "typeVersion": 1
        },
        {
            "name": "Send data to Namecheap",
            "type": "n8n-nodes-base.httpRequest",
            "position": [
                1460,
                300
            ],
            "parameters": {
                "url": "=https:\/\/dynamicdns.park-your-domain.com\/update?host={{$node[\"Loops trough Subdomain list\"].parameter[\"functionCode\"]}}test&domain={{$node[\"yourdomain.com\"].parameter[\"values\"][\"string\"][0][\"value\"]}}&password={{$node[\"yourdomain.com\"].parameter[\"values\"][\"string\"][1][\"value\"]}}&ip={{$node[\"Get Public IP address\"].json[\"ip\"]}}",
                "options": [],
                "responseFormat": "string"
            },
            "typeVersion": 1
        },
        {
            "name": "Get Public IP address",
            "type": "n8n-nodes-base.httpRequest",
            "position": [
                560,
                300
            ],
            "parameters": {
                "url": "https:\/\/api.ipify.org?format=json",
                "options": [],
                "jsonParameters": true,
                "allowUnauthorizedCerts": true
            },
            "retryOnFail": true,
            "typeVersion": 1,
            "continueOnFail": true
        },
        {
            "name": "yourdomain.com",
            "type": "n8n-nodes-base.set",
            "position": [
                920,
                300
            ],
            "parameters": {
                "values": {
                    "string": [
                        {
                            "name": "domain",
                            "value": "yourdomain.com"
                        },
                        {
                            "name": "password",
                            "value": "your-namecheap-ddns-password"
                        }
                    ]
                },
                "options": [],
                "keepOnlySet": true
            },
            "typeVersion": 1
        }
    ],
    "active": false,
    "settings": [],
    "connections": {
        "Cron": {
            "main": [
                [
                    {
                        "node": "Get Public IP address",
                        "type": "main",
                        "index": 0
                    }
                ]
            ]
        },
        "subdomains": {
            "main": [
                [
                    {
                        "node": "Loops trough Subdomain list",
                        "type": "main",
                        "index": 0
                    }
                ]
            ]
        },
        "yourdomain.com": {
            "main": [
                [
                    {
                        "node": "subdomains",
                        "type": "main",
                        "index": 0
                    }
                ]
            ]
        },
        "Checks IP if new": {
            "main": [
                [
                    {
                        "node": "yourdomain.com",
                        "type": "main",
                        "index": 0
                    }
                ]
            ]
        },
        "Get Public IP address": {
            "main": [
                [
                    {
                        "node": "Checks IP if new",
                        "type": "main",
                        "index": 0
                    }
                ]
            ]
        },
        "Loops trough Subdomain list": {
            "main": [
                [
                    {
                        "node": "Send data to Namecheap",
                        "type": "main",
                        "index": 0
                    }
                ]
            ]
        }
    }
}