The workflow JSON
Copy or download the full n8n JSON below. Paste it into a new n8n workflow, add your credentials, activate. Full import guide →
{
"name": "Uptime Monitor - Multi Service (v3)",
"nodes": [
{
"parameters": {},
"type": "n8n-nodes-base.noOp",
"typeVersion": 1,
"position": [
16,
368
],
"id": "b3052d77-41b3-4966-8c76-6991ded70923",
"name": "No Change"
},
{
"parameters": {
"httpMethod": "POST",
"path": "monitor-alert",
"options": {}
},
"type": "n8n-nodes-base.webhook",
"typeVersion": 2.1,
"position": [
-880,
336
],
"id": "3ce1ac31-23ea-4504-acc8-156cdd9187d6",
"name": "Webhook"
},
{
"parameters": {
"fileSelector": "/home/node/.n8n-files/monitor_states.json",
"options": {}
},
"type": "n8n-nodes-base.readWriteFile",
"typeVersion": 1.1,
"position": [
-672,
336
],
"id": "1fc4b9af-23c0-49c1-8caf-bdda6442be42",
"name": "Read States JSON",
"onError": "continueRegularOutput"
},
{
"parameters": {
"jsCode": "// 1. OBTENER DATOS DEL WEBHOOK\nconst webhookData = $('Webhook').first().json.body;\n\n// Usar service si existe, sino usar site como nombre\nconst serviceName = webhookData.service || webhookData.site || 'Servicio Desconocido';\nconst newStatus = String(webhookData.error_code).trim();\nconst site = webhookData.site;\nconst timestamp = webhookData.timestamp || new Date().toISOString();\n\n// 2. LEER ESTADOS ANTERIORES DEL JSON\nlet allStates = {};\nlet oldStatus = 'Primer chequeo';\n\nconst binaryData = $input.first().binary;\nif (binaryData && binaryData.data) {\n try {\n const buffer = await this.helpers.getBinaryDataBuffer(0, 'data');\n const jsonContent = buffer.toString('utf8').trim();\n if (jsonContent && jsonContent !== '{}') {\n allStates = JSON.parse(jsonContent);\n }\n if (allStates[serviceName]) {\n oldStatus = allStates[serviceName].current || 'Primer chequeo';\n }\n } catch (error) {\n console.log('Error leyendo JSON:', error);\n }\n}\n\n// 3. DETECTAR SI HAY CAMBIO\nconst hasChanged = (newStatus !== oldStatus);\nconst isUp = (newStatus === '200' || newStatus === '302');\n\n// 4. ACTUALIZAR ESTADO DEL SERVICIO\nif (!allStates[serviceName]) {\n allStates[serviceName] = {\n current: newStatus,\n previous: null,\n last_change: timestamp,\n history: []\n };\n} else {\n if (hasChanged) {\n allStates[serviceName].history.push({\n from: oldStatus,\n to: newStatus,\n timestamp: timestamp\n });\n if (allStates[serviceName].history.length > 50) {\n allStates[serviceName].history.shift();\n }\n allStates[serviceName].last_change = timestamp;\n }\n allStates[serviceName].previous = oldStatus;\n allStates[serviceName].current = newStatus;\n}\n\nlet displayStatus = newStatus;\nif (newStatus === '000') displayStatus = '000 (Sin Conexi\u00f3n)';\n\nreturn {\n json: {\n alert: hasChanged,\n service: serviceName,\n site: site,\n new_status: displayStatus,\n old_status: oldStatus,\n type: isUp ? 'recovered' : 'down',\n timestamp: timestamp,\n all_states: allStates,\n json_to_save: JSON.stringify(allStates, null, 2)\n }\n};"
},
"type": "n8n-nodes-base.code",
"typeVersion": 2,
"position": [
-448,
336
],
"id": "d2bd5243-13c7-475c-9db2-4e363fdd4069",
"name": "Process Status Change"
},
{
"parameters": {
"conditions": {
"options": {
"caseSensitive": true,
"leftValue": "",
"typeValidation": "strict",
"version": 3
},
"conditions": [
{
"id": "9350a1ce-3382-4a58-b138-ef25d26a51a3",
"leftValue": "={{ $json.alert }}",
"rightValue": "true",
"operator": {
"type": "boolean",
"operation": "true",
"singleValue": true
}
}
],
"combinator": "and"
},
"options": {}
},
"type": "n8n-nodes-base.if",
"typeVersion": 2.3,
"position": [
-224,
336
],
"id": "10f52d6d-9834-4eb6-8a68-120c5841d22a",
"name": "If Status Changed"
},
{
"parameters": {
"chatId": "794033826",
"text": "={{ $json.type == 'recovered' ? '\ud83d\udfe2 \u00a1SERVICIO RECUPERADO!' : '\ud83d\udea8 \u00a1ALERTA: SITIO CA\u00cdDO!' }}\n\n\ud83d\udd27 **Servicio:** {{ $json.service }}\n\ud83c\udf10 **URL:** {{ $json.site }}\n\ud83d\udcca **Estado Actual:** {{ $json.new_status }}\n\ud83d\udccb **Estado Anterior:** {{ $json.old_status }}\n\ud83d\udcc5 **Hora:** {{ $json.timestamp }}",
"additionalFields": {}
},
"type": "n8n-nodes-base.telegram",
"typeVersion": 1.2,
"position": [
16,
176
],
"id": "1de1e8dd-497c-4ae6-b3c6-226237a690f3",
"name": "Send Alert to Telegram",
"credentials": {
"telegramApi": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"operation": "toText",
"sourceProperty": "data",
"options": {
"fileName": "monitor_states.json"
}
},
"type": "n8n-nodes-base.convertToFile",
"typeVersion": 1.1,
"position": [
-272,
544
],
"id": "5ea55742-d4b3-46a2-98bd-7d2b0d4bef85",
"name": "Convert States to JSON File"
},
{
"parameters": {
"operation": "write",
"fileName": "/home/node/.n8n-files/monitor_states.json",
"options": {
"append": false
}
},
"type": "n8n-nodes-base.readWriteFile",
"typeVersion": 1.1,
"position": [
-80,
544
],
"id": "d9464f1f-97c0-467c-a91f-10be5b6c14e6",
"name": "Save States JSON",
"executeOnce": false,
"retryOnFail": false,
"onError": "continueRegularOutput"
},
{
"parameters": {
"assignments": {
"assignments": [
{
"id": "json-states",
"name": "=data",
"value": "={{ JSON.stringify($json.all_states, null, 2) }}",
"type": "string"
}
]
},
"options": {}
},
"type": "n8n-nodes-base.set",
"typeVersion": 3.4,
"position": [
-448,
544
],
"id": "55134575-6462-4a5c-b41d-106e9f7c422c",
"name": "Prepare JSON for Save"
}
],
"connections": {
"Webhook": {
"main": [
[
{
"node": "Read States JSON",
"type": "main",
"index": 0
}
]
]
},
"Read States JSON": {
"main": [
[
{
"node": "Process Status Change",
"type": "main",
"index": 0
}
]
]
},
"Process Status Change": {
"main": [
[
{
"node": "If Status Changed",
"type": "main",
"index": 0
},
{
"node": "Prepare JSON for Save",
"type": "main",
"index": 0
}
]
]
},
"If Status Changed": {
"main": [
[
{
"node": "Send Alert to Telegram",
"type": "main",
"index": 0
}
],
[
{
"node": "No Change",
"type": "main",
"index": 0
}
]
]
},
"Prepare JSON for Save": {
"main": [
[
{
"node": "Convert States to JSON File",
"type": "main",
"index": 0
}
]
]
},
"Convert States to JSON File": {
"main": [
[
{
"node": "Save States JSON",
"type": "main",
"index": 0
}
]
]
}
},
"active": true,
"settings": {
"executionOrder": "v1",
"availableInMCP": false,
"timeSavedMode": "fixed",
"callerPolicy": "workflowsFromSameOwner"
},
"versionId": "ff1dd1b3-aec1-492a-b0cd-90daec70e706",
"meta": {
"templateCredsSetupCompleted": true
},
"id": "AjBDxecKidHHOm2c6NYg9",
"tags": []
}
Credentials you'll need
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telegramApi
Pro
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About this workflow
Uptime Monitor - Multi Service (v3). Uses readWriteFile, telegram. Webhook trigger; 9 nodes.
Source: https://github.com/RogerPugaRuiz/uptime-ai-notifier/blob/c604d68dd376f6f1fb8a7cd157cb002654a19beb/workflows/v3.0.0.json — original creator credit. Request a take-down →
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