1Phone Number ID: 1234567890
2Access Token: EAAxxxxxxxx...

1docker run -d \
2  --name n8n \
3  -p 5678:5678 \
4  -v ~/.n8n:/home/node/.n8n \
5  -e WEBHOOK_URL=https://tu-dominio.com \
6  n8nio/n8n

1npm install -g n8n
2n8n start

1{
2  "from": "{{ $json.entry[0].changes[0].value.messages[0].from }}",
3  "message": "{{ $json.entry[0].changes[0].value.messages[0].text.body }}",
4  "timestamp": "{{ $json.entry[0].changes[0].value.messages[0].timestamp }}",
5  "messageId": "{{ $json.entry[0].changes[0].value.messages[0].id }}"
6}

1Model: gpt-4o
2Messages:
3- System: "Eres un asistente de atención al cliente para [Tu Empresa].
4           Responde de forma amable y concisa en español.
5           Si no puedes ayudar, indica que un humano responderá pronto."
6- User: {{ $json.message }}

1Method: POST
2URL: https://api.anthropic.com/v1/messages
3Headers:
4  - x-api-key: tu-api-key
5  - anthropic-version: 2024-01-01
6  - content-type: application/json
7Body:
8{
9  "model": "claude-3-5-sonnet-20241022",
10  "max_tokens": 500,
11  "messages": [
12    {
13      "role": "user",
14      "content": "{{ $json.message }}"
15    }
16  ],
17  "system": "Eres un asistente de atención al cliente..."
18}

1Method: POST
2URL: https://graph.facebook.com/v18.0/{{ $env.PHONE_NUMBER_ID }}/messages
3Headers:
4  - Authorization: Bearer {{ $env.WHATSAPP_TOKEN }}
5  - Content-Type: application/json
6Body:
7{
8  "messaging_product": "whatsapp",
9  "to": "{{ $json.from }}",
10  "type": "text",
11  "text": {
12    "body": "{{ $json.aiResponse }}"
13  }
14}

1CREATE TABLE conversations (
2  id SERIAL PRIMARY KEY,
3  phone VARCHAR(20),
4  role VARCHAR(10),
5  content TEXT,
6  created_at TIMESTAMP DEFAULT NOW()
7);

1INSERT INTO conversations (phone, role, content)
2VALUES ('{{ $json.from }}', 'user', '{{ $json.message }}')

1SELECT role, content
2FROM conversations
3WHERE phone = '{{ $json.from }}'
4ORDER BY created_at DESC
5LIMIT 10

1const history = items.map(item => ({
2  role: item.json.role === 'user' ? 'user' : 'assistant',
3  content: item.json.content
4})).reverse();
5 
6return { messages: history };

1// Nodo "IF"
2const message = $json.message.toLowerCase();
3const escalateKeywords = ['hablar con humano', 'agente', 'persona real', 'queja'];
4 
5const shouldEscalate = escalateKeywords.some(kw => message.includes(kw));
6 
7return { escalate: shouldEscalate };

1// Nodo "Code"
2const now = new Date();
3const hour = now.getHours();
4const isBusinessHours = hour >= 9 && hour < 18;
5const isWeekday = now.getDay() >= 1 && now.getDay() <= 5;
6 
7return {
8  available: isBusinessHours && isWeekday,
9  message: isBusinessHours && isWeekday
10    ? null
11    : "Gracias por tu mensaje. Nuestro horario es L-V 9-18h. Te responderemos pronto."
12};

1{
2  "messaging_product": "whatsapp",
3  "to": "{{ $json.from }}",
4  "type": "interactive",
5  "interactive": {
6    "type": "button",
7    "body": {
8      "text": "¿En qué puedo ayudarte?"
9    },
10    "action": {
11      "buttons": [
12        {"type": "reply", "reply": {"id": "info", "title": "Información"}},
13        {"type": "reply", "reply": {"id": "soporte", "title": "Soporte"}},
14        {"type": "reply", "reply": {"id": "ventas", "title": "Ventas"}}
15      ]
16    }
17  }
18}

1{
2  "messaging_product": "whatsapp",
3  "to": "{{ $json.from }}",
4  "type": "image",
5  "image": {
6    "link": "https://tu-dominio.com/catalogo.pdf",
7    "caption": "Aquí tienes nuestro catálogo"
8  }
9}

1┌─────────────┐
2│  Webhook    │ ← Mensaje de WhatsApp
3└─────┬───────┘
4      ▼
5┌─────────────┐
6│ Extraer     │
7│ Datos       │
8└─────┬───────┘
9      ▼
10┌─────────────┐
11│ Cargar      │
12│ Historial   │ ← PostgreSQL
13└─────┬───────┘
14      ▼
15┌─────────────┐
16│ Verificar   │
17│ Escalado    │ ──► [Si escalado] ──► Notificar Humano
18└─────┬───────┘
19      ▼
20┌─────────────┐
21│ Procesar    │
22│ con IA      │ ← OpenAI/Claude
23└─────┬───────┘
24      ▼
25┌─────────────┐
26│ Guardar     │
27│ Respuesta   │ → PostgreSQL
28└─────┬───────┘
29      ▼
30┌─────────────┐
31│ Enviar      │
32│ WhatsApp    │ → API de WhatsApp
33└─────────────┘