This workflow follows the HTTP Request → Supabase recipe pattern — see all workflows that pair these two integrations.
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 →
{
"nodes": [
{
"parameters": {
"jsCode": "const webhookData = $input.first().json;\nconst messages = webhookData.body?.messages || [];\nconst lastUserMsg = messages.filter(m => m.role === 'user').pop()?.content || '';\nconst text = lastUserMsg.toLowerCase();\n\n// Intent: Tax Calculation\nconst taxKeywords = ['ganancias', 'sueldo', 'bruto', 'neto', 'impuesto', 'calculadora', 'deducciones', 'pago de'];\nconst isTaxQuery = taxKeywords.some(kw => text.includes(kw));\n\n// Intent: Short/Greeting\nconst isShort = text.length < 60;\nconst hasQuestion = text.includes('?');\nconst isJustEmail = /[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\\.[a-zA-Z]{2,}/.test(text) && text.length < 80;\n\nlet requires_rag = true;\nlet intent = 'general';\n\nif (isTaxQuery) {\n intent = 'tax';\n requires_rag = false;\n} else if ((isShort && !hasQuestion && isJustEmail) || ['hola', 'hi', 'hello', 'buenos d\u00edas', 'gracias', 'thanks'].includes(text.trim())) {\n requires_rag = false;\n intent = 'greeting';\n}\n\nreturn [{\n json: {\n ...webhookData,\n requires_rag,\n intent\n }\n}];"
},
"id": "1eff4a18-b4d0-4cb2-882a-4b95c4b6bd35",
"name": "Analyze Intent",
"type": "n8n-nodes-base.code",
"typeVersion": 2,
"position": [
-2272,
1104
]
},
{
"parameters": {
"rules": {
"values": [
{
"conditions": {
"options": {
"caseSensitive": true,
"leftValue": "",
"typeValidation": "strict",
"version": 1
},
"conditions": [
{
"id": "cond1",
"leftValue": "={{ $json.intent }}",
"rightValue": "tax",
"operator": {
"type": "string",
"operation": "equals"
}
}
],
"combinator": "and"
},
"renameOutput": true,
"outputKey": "tax"
},
{
"conditions": {
"options": {
"caseSensitive": true,
"leftValue": "",
"typeValidation": "strict",
"version": 1
},
"conditions": [
{
"id": "cond2",
"leftValue": "={{ $json.requires_rag }}",
"rightValue": "={{ true }}",
"operator": {
"type": "boolean",
"operation": "true"
}
}
],
"combinator": "and"
},
"renameOutput": true,
"outputKey": "rag"
}
]
},
"fallbackOutput": 2
},
"id": "15d55ac8-06ae-4d22-8d1a-8f0d40e4e43f",
"name": "Router by Intent",
"type": "n8n-nodes-base.switch",
"typeVersion": 3,
"position": [
-2048,
1104
]
},
{
"parameters": {
"httpMethod": "POST",
"path": "mga-ai-agent",
"responseMode": "responseNode",
"options": {
"allowedOrigins": "https://www.mgatc.com,https://mgatc.pages.dev,http://localhost:3000,http://localhost:3001,https://mgatc.com"
}
},
"id": "ed1c921c-da89-452e-8411-0797d3a29ea6",
"name": "Webhook Trigger1",
"type": "n8n-nodes-base.webhook",
"typeVersion": 2,
"position": [
-2496,
1104
]
},
{
"parameters": {
"jsCode": "const response = $input.first().json;\nconst error = response.error;\nconst assistantMessage = error ? '' : (response.choices?.[0]?.message?.content || '');\n\nconst webhookBody = $('Webhook Trigger1').first().json.body;\nconst allMessages = webhookBody.messages || [];\nconst conversationStr = JSON.stringify(allMessages);\n\nlet email = webhookBody.user_info?.email || null;\nlet name = webhookBody.user_info?.name || null;\n\nif (!email) {\n const emailRegex = /[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\\.[a-zA-Z]{2,}/g;\n const emails = conversationStr.match(emailRegex) || [];\n email = emails[0] || null;\n}\n\nconst systemMsg = allMessages.find(m => m.role === 'system');\nconst sourceLang = systemMsg?.content?.includes('currently set to English') ? 'en' : 'es';\n\nlet chatHtml = \"\";\ntry {\n const chatMessages = allMessages.filter(m => m.role !== 'system').slice(-6);\n if (chatMessages.length > 0) {\n chatHtml = chatMessages.map(msg => {\n const isUser = msg.role === 'user';\n const label = isUser ? 'Usuario' : 'Asistente';\n const bgColor = isUser ? '#f8fafc' : '#ffffff';\n const borderColor = isUser ? '#2563eb' : '#10b981';\n return `<div style=\"margin-bottom: 12px; padding: 12px; border-radius: 8px; background-color: ${bgColor}; border-left: 4px solid ${borderColor}; font-family: sans-serif;\"><strong style=\"display: block; font-size: 11px; color: #64748b; text-transform: uppercase; margin-bottom: 4px;\">${label}</strong><div style=\"font-size: 14px; color: #1e293b; line-height: 1.5;\">${msg.content}</div></div>`;\n }).join('');\n } else {\n chatHtml = \"<p>No hay mensajes recientes.</p>\";\n }\n} catch (e) { chatHtml = \"<p>Error.</p>\"; }\n\nreturn [{\n json: {\n error,\n assistantMessage,\n email,\n name,\n sourceLang,\n hasLead: !!(email || name),\n chatHtml,\n conversation: allMessages.slice(-6)\n }\n}];"
},
"id": "e3476c48-cc05-42ab-bf9e-bef99b7db74c",
"name": "Extract Lead Data1",
"type": "n8n-nodes-base.code",
"typeVersion": 2,
"position": [
-1152,
1104
]
},
{
"parameters": {
"respondWith": "json",
"responseBody": "={{ { content: $json.assistantMessage || ($json.error ? 'Error: ' + $json.error.message : 'No se pudo obtener respuesta de la IA.') } }}",
"options": {}
},
"id": "8930e3b4-b2a2-4bf5-a652-53e8a699fede",
"name": "Respond to Frontend2",
"type": "n8n-nodes-base.respondToWebhook",
"typeVersion": 1,
"position": [
-928,
1008
]
},
{
"parameters": {
"operation": "select",
"schema": "public",
"tableId": "tax_calculator_params",
"filtersUi": {
"conditions": [
{
"id": "[ID]",
"leftValue": "id",
"rightValue": 1,
"operator": "eq"
}
]
}
},
"id": "tax-p-1",
"name": "Get Tax Params",
"type": "n8n-nodes-base.supabase",
"typeVersion": 1,
"position": [
-1900,
800
],
"credentials": {
"supabaseApi": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"operation": "select",
"schema": "public",
"tableId": "tax_scale_brackets",
"additionalOptions": {
"sort": [
{
"column": "bracket_order",
"direction": "asc"
}
]
}
},
"id": "tax-b-1",
"name": "Get Tax Brackets",
"type": "n8n-nodes-base.supabase",
"typeVersion": 1,
"position": [
-1900,
950
],
"credentials": {
"supabaseApi": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"jsCode": "const params = $('Get Tax Params').first().json;\nconst brackets = $('Get Tax Brackets').all().map(i => i.json);\nconst webhookData = $('Webhook Trigger1').first().json;\nconst lastMsg = webhookData.body.messages.filter(m => m.role === 'user').pop().content;\n\n// Extraer monto\nconst amountMatch = lastMsg.match(/(\\d+[\\d\\.,]*)/);\nif (!amountMatch) return { json: { ...webhookData, tax_calc: null, needs_data: true } };\n\nlet brutoMensual = parseFloat(amountMatch[0].replace(/\\./g, '').replace(',', '.'));\nif (brutoMensual < 100) brutoMensual *= 1000000;\nelse if (brutoMensual < 10000) brutoMensual *= 1000;\n\n// Deducciones Familiares (Regex simple)\nlet hijos = 0;\nconst hMatch = lastMsg.match(/(\\d+)\\s*hijo/i);\nif (hMatch) hijos = parseInt(hMatch[1]);\nelse if (lastMsg.includes('un hijo')) hijos = 1;\n\nconst conyuge = lastMsg.toLowerCase().includes('conyuge') || lastMsg.toLowerCase().includes('pareja');\n\n// C\u00e1lculo\nconst gni = parseFloat(params.gni);\nconst especial = parseFloat(params.deduccion_especial);\nconst aportesPct = parseFloat(params.aportes_pct);\n\nconst netoAnual = (brutoMensual * 13) * (1 - aportesPct);\nlet deducciones = gni + especial;\ndeducciones += hijos * parseFloat(params.hijo);\nif (conyuge) deducciones += parseFloat(params.conyuge);\n\nconst base = Math.max(0, netoAnual - deducciones);\n\nlet impuestoAnual = 0;\nif (base > 0) {\n let bracket = brackets[0];\n for (const b of brackets) {\n if (base > parseFloat(b.limit_amount)) bracket = b;\n else break;\n }\n const exceso = base - parseFloat(bracket.limit_amount);\n impuestoAnual = parseFloat(bracket.fixed_amount) + (exceso * parseFloat(bracket.pct));\n}\n\nreturn [{\n json: {\n ...webhookData,\n tax_calc: {\n bruto: brutoMensual,\n netoMensual: (netoAnual - impuestoAnual) / 13,\n impuestoMensual: impuestoAnual / 12,\n base,\n hijos,\n conyuge\n }\n }\n}];"
},
"id": "tax-c-1",
"name": "Tax Calculator Logic",
"type": "n8n-nodes-base.code",
"typeVersion": 2,
"position": [
-1600,
900
]
},
{
"parameters": {
"method": "POST",
"url": "https://router.huggingface.co/v1/chat/completions",
"authentication": "genericCredentialType",
"genericAuthType": "httpHeaderAuth",
"sendHeaders": true,
"headerParameters": {
"parameters": [
{
"name": "Content-Type",
"value": "application/json"
}
]
},
"sendBody": true,
"specifyBody": "json",
"jsonBody": "={{ \n JSON.stringify({ \n messages: (function() { \n const data = $input.first().json; \n const history = data.body.messages; \n const calc = data.tax_calc; \n const systemMsg = history.find(m => m.role === 'system'); \n const otherMsgs = history.filter(m => m.role !== 'system'); \n let taxContext = \"\";\n if (calc) {\n taxContext = `\\n\\nCALCULATION RESULT (Usa esto para responder de forma amigable):\\nSueldo Bruto Mensual: $${Math.round(calc.bruto).toLocaleString()}\\nNeto Estimado (con Ganancias y Aportes): $${Math.round(calc.netoMensual).toLocaleString()}\\nRetenci\u00f3n mensual Ganancias: $${Math.round(calc.impuestoMensual).toLocaleString()}\\nDeducciones aplicadas: ${calc.hijos} hijos, ${calc.conyuge ? 'C\u00f3nyuge' : 'Sin c\u00f3nyuge'}.\\nExplica que es un c\u00e1lculo de Ganancias 2026 y ofrece contactar a Mariano para optimizaci\u00f3n financiera [ACTION:CONTACT].`;\n } else {\n taxContext = \"\\n\\nINSTRUCCI\u00d3N: El usuario quiere calcular su sueldo pero no proporcion\u00f3 el monto bruto. P\u00eddele amablemente el sueldo bruto mensual y si tiene hijos o c\u00f3nyuge para ser exacto.\";\n }\n return [ \n { role: 'system', content: (systemMsg?.content || '') + taxContext }, \n ...otherMsgs \n ]; \n })(), \n model: 'zai-org/GLM-4.7-Flash:novita', \n stream: false \n }) \n}}",
"options": {}
},
"type": "n8n-nodes-base.httpRequest",
"typeVersion": 4.4,
"position": [
-1376,
900
],
"id": "tax-h-1",
"name": "Call HF Tax Response",
"credentials": {
"httpHeaderAuth": {
"name": "<your credential>"
}
}
}
],
"connections": {
"Webhook Trigger1": {
"main": [
[
{
"node": "Analyze Intent",
"type": "main",
"index": 0
}
]
]
},
"Analyze Intent": {
"main": [
[
{
"node": "Router by Intent",
"type": "main",
"index": 0
}
]
]
},
"Router by Intent": {
"main": [
[
{
"node": "Get Tax Params",
"type": "main",
"index": 0
}
],
[
{
"node": "Hugging Face Embedding Model",
"type": "main",
"index": 0
}
],
[
{
"node": "Call Hugging Face General",
"type": "main",
"index": 0
}
]
]
},
"Get Tax Params": {
"main": [
[
{
"node": "Get Tax Brackets",
"type": "main",
"index": 0
}
]
]
},
"Get Tax Brackets": {
"main": [
[
{
"node": "Tax Calculator Logic",
"type": "main",
"index": 0
}
]
]
},
"Tax Calculator Logic": {
"main": [
[
{
"node": "Call HF Tax Response",
"type": "main",
"index": 0
}
]
]
},
"Call HF Tax Response": {
"main": [
[
{
"node": "Extract Lead Data1",
"type": "main",
"index": 0
}
]
]
}
}
}
Credentials you'll need
Each integration node will prompt for credentials when you import. We strip credential IDs before publishing — you'll add your own.
httpHeaderAuthsupabaseApi
Pro
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About this workflow
Ai Assistant Tax Workflow. Uses supabase, httpRequest. Webhook trigger; 9 nodes.
Source: https://github.com/Mgobeaalcoba/Mgobeaalcoba.github.io/blob/main/docs/automations/ai_assistant_tax_workflow.json — original creator credit. Request a take-down →
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