SyncMatrix.
Trello logo + Google Calendar logo

Automate Trello & Google Calendar

Stop paying for mismatched spreadsheets. Sync data between Trello and Google Calendar in real-time, so you can manage your operations without the busywork.

Get This Workflow Built
Custom API Integration
Secure Data Transfer
Done-For-You Setup

How the Data Flows

graph LR
    subgraph Source ["Trello"]
        T1(["Card Archived Legacy"])
    end
    
    subgraph Middleware ["Enterprise Integration Core"]
        W[CRON API
Poller] --> V{Validation
& Auth}
        V -->|Fail| DLQ[Dead Letter
Queue]
        V -->|Pass| Map[Data Mapping
& Transformation]
        Map --> Retry[Rate Limiting
& Retries]
    end
    
    subgraph Target ["Google Calendar"]
        A1(["Add Attendees to Event"])
    end

    T1 -->|JSON Payload| W
    Retry -->|Authenticated API POST| A1

    style Source fill:transparent,stroke:#cbd5e1,stroke-dasharray: 5 5
    style Target fill:transparent,stroke:#cbd5e1,stroke-dasharray: 5 5
    style Middleware fill:#f8fafc,stroke:#94a3b8,stroke-width:2px
    style T1 fill:#3b82f6,stroke:#fff,stroke-width:2px,color:#fff
    style W fill:#1f2937,stroke:#fff,stroke-width:1px,color:#fff
    style V fill:#1f2937,stroke:#fff,stroke-width:1px,color:#fff
    style Map fill:#1f2937,stroke:#fff,stroke-width:1px,color:#fff
    style Retry fill:#1f2937,stroke:#fff,stroke-width:1px,color:#fff
    style DLQ fill:#ef4444,stroke:#fff,stroke-width:1px,color:#fff
    style A1 fill:#e11d48,stroke:#fff,stroke-width:2px,color:#fff
When Trello and Google Calendar operate independently, project deadlines can become misaligned, leading to missed meetings and delayed deliverables. For instance, if a team member updates a due date in Trello but neglects to manually adjust the corresponding event in Google Calendar, the marketing team may show up for a presentation that was never scheduled. This miscommunication wastes valuable time for both the project management and marketing teams, as they scramble to realign their schedules and ensure everyone is on the same page.

Top Ways to Automate Trello & Google Calendar

  • Automated Task Scheduling: Instantly sync Trello due dates with Google Calendar events, ensuring that all deadlines are visible in one place and reducing the risk of missed tasks.
  • Real-Time Updates: Automatically update Trello cards when Google Calendar events are modified, keeping your project management in sync with your schedule and eliminating manual entry.
  • Weekly Overview Notifications: Receive automated weekly summaries of upcoming Trello tasks and Google Calendar events, allowing teams to plan effectively and prioritize their workload.

How to Build the Trello → Google Calendar Sync

  1. In Trello, set up a webhook to listen for card updates. Use the endpoint https://api.trello.com/1/cards/{id}/actions/updateCard to capture changes to card due dates.
  2. Extract the payload data from the webhook to obtain the new due date. The relevant fields include data.due for the new date and data.card.name for the card title.
  3. Using the Google Calendar API, construct a POST request to the endpoint https://www.googleapis.com/calendar/v3/calendars/{calendarId}/events.
  4. In the POST request, include the extracted due date in the start and end fields of the event object, and set the summary field to the card title.

Developer Warnings & API Gotchas

  • Ensure that the Trello card's due date is in the correct format (ISO 8601) when sending to Google Calendar, or the event may not be created properly.
  • If a Trello card is moved to a different list, the webhook may not trigger an update if the due date remains unchanged, leading to stale events in Google Calendar.
  • Be cautious with time zones; if the Trello due date does not specify a time zone, it may default to UTC, which could misalign with the local time settings of the Google Calendar.

Supported API Operations

We leverage official, stable endpoints to ensure secure data transfer. No deprecated legacy routes.

  • When this happens in Trello... Card Archived (Legacy)
    Do this in Google Calendar Add Attendee(s) to Event
  • When this happens in Trello... Card Due
    Do this in Google Calendar Create Calendar
  • When this happens in Trello... Card Moved to List
    Do this in Google Calendar Create Detailed Event
  • When this happens in Trello... Card Moved to List (Legacy)
    Do this in Google Calendar Delete Event
  • When this happens in Trello... Card Updated
    Do this in Google Calendar Move Event to Another Calendar

SyncMatrix Experts

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I can see you're looking at mapping Trello to Google Calendar. Tell me about your current setup—what's the specific bottleneck you're trying to automate right now?