Slack Calendar Bot

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": "Slack Calendar Bot",
  "nodes": [
    {
      "parameters": {
        "events": [
          "message"
        ],
        "options": {}
      },
      "name": "Slack Trigger",
      "type": "n8n-nodes-base.slackTrigger",
      "typeVersion": 1,
      "position": [
        250,
        300
      ],
      "credentials": {
        "slackApi": {
          "name": "<your credential>"
        }
      }
    },
    {
      "parameters": {
        "conditions": {
          "string": [
            {
              "value1": "={{$json.text}}",
              "operation": "contains",
              "value2": "agenda"
            }
          ]
        }
      },
      "name": "Check Command",
      "type": "n8n-nodes-base.if",
      "typeVersion": 2,
      "position": [
        450,
        300
      ]
    },
    {
      "parameters": {
        "authentication": "oAuth2",
        "calendarId": "primary",
        "startDate": "={{DateTime.now().toISO()}}",
        "endDate": "={{DateTime.now().plus({days: 7}).toISO()}}",
        "options": {
          "maxResults": 10,
          "singleEvents": true,
          "orderBy": "startTime"
        }
      },
      "name": "Get Calendar Events",
      "type": "n8n-nodes-base.googleCalendar",
      "typeVersion": 2,
      "position": [
        650,
        200
      ],
      "credentials": {
        "googleCalendarOAuth2Api": {
          "name": "<your credential>"
        }
      }
    },
    {
      "parameters": {
        "jsCode": "const events = $input.all().map(i => i.json);\nconst channel = $('Slack Trigger').first().json.channel;\nconst user = $('Slack Trigger').first().json.user;\n\nconst formattedEvents = events.map(e => {\n  const start = DateTime.fromISO(e.start?.dateTime || e.start?.date);\n  return {\n    summary: e.summary,\n    start: start.toFormat('dd/MM/yyyy HH:mm'),\n    duration: e.end ? DateTime.fromISO(e.end.dateTime || e.end.date).diff(start, 'hours').hours + 'h' : 'Todo el d\u00eda'\n  };\n});\n\nreturn {\n  json: {\n    channel,\n    user,\n    events: formattedEvents\n  }\n};"
      },
      "name": "Format Events",
      "type": "n8n-nodes-base.code",
      "typeVersion": 2,
      "position": [
        850,
        200
      ]
    },
    {
      "parameters": {
        "channel": "={{$json.channel}}",
        "text": "\ud83d\udcc5 *Pr\u00f3ximos eventos (7 d\u00edas)*\n\n{{$json.events.map((e, i) => `${i+1}. *${e.summary}*\\n   \ud83d\udccd ${e.start} (${e.duration})`).join('\\n\\n')}}\n\n\ud83d\udca1 Escribe `reservar demo` para agendar",
        "attachments": [],
        "otherOptions": {}
      },
      "name": "Send Calendar to Slack",
      "type": "n8n-nodes-base.slack",
      "typeVersion": 2.1,
      "position": [
        1050,
        200
      ],
      "credentials": {
        "slackApi": {
          "name": "<your credential>"
        }
      }
    }
  ],
  "connections": {
    "Slack Trigger": {
      "main": [
        [
          {
            "node": "Check Command",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Check Command": {
      "main": [
        [
          {
            "node": "Get Calendar Events",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Get Calendar Events": {
      "main": [
        [
          {
            "node": "Format Events",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Format Events": {
      "main": [
        [
          {
            "node": "Send Calendar to Slack",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  },
  "settings": {
    "executionOrder": "v1"
  },
  "staticData": null,
  "tags": [
    "slack",
    "calendar"
  ],
  "triggerCount": 0,
  "updatedAt": "2025-11-30T17:05:00.000Z",
  "versionId": "1"
}

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.

• googleCalendarOAuth2Api
• slackApi

About this workflow

Slack Calendar Bot. Uses slackTrigger, googleCalendar, slack. Event-driven trigger; 5 nodes.

Source: https://github.com/SmarterCL/os.smarterbot.cl/blob/0c9c17e0e6d7e57ba50d1141b656b14242162c9d/n8n-workflows/slack-calendar-bot.json — original creator credit. Request a take-down →

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