WhatsApp Appointment Scheduler

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": "WhatsApp AI - Appointment Scheduler",
  "active": true,
  "nodes": [
    {
      "parameters": {
        "httpMethod": "POST",
        "path": "schedule-appointment",
        "responseMode": "onReceived"
      },
      "name": "Webhook Schedule Request",
      "type": "n8n-nodes-base.webhook",
      "typeVersion": 1,
      "position": [
        240,
        300
      ]
    },
    {
      "parameters": {
        "operation": "executeQuery",
        "query": "SELECT d.id, u.name, s.name as specialty, s.price, s.duration FROM doctors d JOIN users u ON d.user_id = u.id JOIN specialties s ON d.specialty_id = s.id WHERE u.active = true AND s.name ILIKE '%{{ $json.specialty }}%' ORDER BY u.name LIMIT 5;"
      },
      "name": "Find Available Doctors",
      "type": "n8n-nodes-base.postgres",
      "typeVersion": 1,
      "position": [
        460,
        300
      ],
      "credentials": {
        "postgres": {
          "name": "<your credential>"
        }
      }
    },
    {
      "parameters": {
        "operation": "executeQuery",
        "query": "SELECT appointment_date FROM appointments WHERE doctor_id = {{ $json.doctor_id }} AND appointment_date::date = '{{ $json.requested_date }}'::date AND status IN ('SCHEDULED', 'CONFIRMED') ORDER BY appointment_date;"
      },
      "name": "Check Doctor Schedule",
      "type": "n8n-nodes-base.postgres",
      "typeVersion": 1,
      "position": [
        680,
        300
      ],
      "credentials": {
        "postgres": {
          "name": "<your credential>"
        }
      }
    },
    {
      "parameters": {
        "operation": "executeQuery",
        "query": "INSERT INTO users (name, phone, email, role, created_at) VALUES ('{{ $json.patient_name }}', '{{ $json.phone_number }}', '{{ $json.email || $json.phone_number + '@whatsapp.temp' }}', 'PATIENT', NOW()) ON CONFLICT (phone) DO UPDATE SET name = EXCLUDED.name, email = EXCLUDED.email RETURNING id;"
      },
      "name": "Find or Create Patient",
      "type": "n8n-nodes-base.postgres",
      "typeVersion": 1,
      "position": [
        900,
        200
      ],
      "credentials": {
        "postgres": {
          "name": "<your credential>"
        }
      }
    },
    {
      "parameters": {
        "operation": "executeQuery",
        "query": "INSERT INTO appointments (patient_id, doctor_id, appointment_date, status, notes, created_at) VALUES ({{ $json.patient_id }}, {{ $json.doctor_id }}, '{{ $json.appointment_datetime }}', 'SCHEDULED', 'Agendado via WhatsApp AI - N8N', NOW()) RETURNING id, appointment_date;"
      },
      "name": "Create Appointment",
      "type": "n8n-nodes-base.postgres",
      "typeVersion": 1,
      "position": [
        1120,
        300
      ],
      "credentials": {
        "postgres": {
          "name": "<your credential>"
        }
      }
    },
    {
      "parameters": {
        "url": "http://host.docker.internal:3000/api/v1/webhooks/whatsapp",
        "sendHeaders": true,
        "headerParameters": {
          "parameters": [
            {
              "name": "Content-Type",
              "value": "application/json"
            }
          ]
        },
        "sendBody": true,
        "bodyParameters": {
          "parameters": [
            {
              "name": "to",
              "value": "{{ $json.phone_number }}"
            },
            {
              "name": "message",
              "value": "\u2705 Consulta agendada com sucesso!\\n\\n\ud83d\udcc5 Data: {{ $json.appointment_date }}\\n\ud83d\udc68\u200d\u2695\ufe0f M\u00e9dico: {{ $json.doctor_name }}\\n\ud83c\udfe5 Especialidade: {{ $json.specialty }}\\n\\n\ud83d\udccb Detalhes enviados por SMS/email.\\n\\nObrigado por escolher a EO Cl\u00ednica! \ud83c\udfe5"
            }
          ]
        }
      },
      "name": "Send Confirmation WhatsApp",
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 1,
      "position": [
        1340,
        300
      ]
    }
  ],
  "connections": {
    "Webhook Schedule Request": {
      "main": [
        [
          {
            "node": "Find Available Doctors",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Find Available Doctors": {
      "main": [
        [
          {
            "node": "Check Doctor Schedule",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Check Doctor Schedule": {
      "main": [
        [
          {
            "node": "Find or Create Patient",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Find or Create Patient": {
      "main": [
        [
          {
            "node": "Create Appointment",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Create Appointment": {
      "main": [
        [
          {
            "node": "Send Confirmation WhatsApp",
            "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.

• postgres

About this workflow

WhatsApp AI - Appointment Scheduler. Uses postgres, httpRequest. Webhook trigger; 6 nodes.

Source: https://github.com/josivantarcio/jtarcio-clinica/blob/5a32b5aefd7b5b26708a538f33cd13647eac413f/n8n-workflows/workflow2.json — original creator credit. Request a take-down →

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