Task: Push your public IP to Namecheaps Dynamic DNS

n8n workflow:
{"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}]]}}}