Automate Trello & Slack

Stop paying for mismatched spreadsheets. Sync data between Trello and Slack 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 ["Slack"]
        A1(["Add Reaction"])
    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 Slack operate independently, project updates can fall through the cracks. For instance, if a team member moves a card to 'Done' in Trello, that status change may not trigger a notification in Slack, leaving other team members unaware of project progress. This leads to wasted time as project managers manually check Trello for updates and send messages in Slack to inform the team, resulting in delays and potential miscommunication.

Top Ways to Automate Trello & Slack

Automated Task Notifications: Instantly receive updates in Slack whenever a task is created, updated, or completed in Trello, ensuring your team is always aligned and informed.
Daily Standup Reminders: Automatically generate and send daily summaries of Trello board activities to a designated Slack channel, keeping everyone on the same page and enhancing accountability.
Comment Alerts: Get real-time notifications in Slack for comments made on Trello cards, fostering timely discussions and reducing the risk of miscommunication.

How to Build the Trello → Slack Sync

In Trello, navigate to the board settings and create a new webhook by specifying the URL for the Slack integration.
Set the webhook to trigger on the 'Card Updated' event, ensuring it captures when a card's status changes.
In the webhook payload, extract the 'card name', 'list name', and 'member who updated' fields.
Format the extracted data into a message string, such as: ' has moved to '.
Use the Slack API endpoint POST https://slack.com/api/chat.postMessage to send the formatted message to the desired channel.
Include the necessary authentication token in the headers for the Slack API request.

Developer Warnings & API Gotchas

Ensure that the card status change in Trello is accurately reflected in the payload; otherwise, the message sent to Slack may contain outdated information.
Be cautious with the Slack channel ID; using an incorrect ID will result in the message being sent to the wrong channel or failing entirely.
Remember to handle the case where multiple members update the same card simultaneously, as this could lead to conflicting messages in Slack.

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 Slack Add Reaction
When this happens in Trello... Card Due

Do this in Slack Add Reminder
When this happens in Trello... Card Moved to List

Do this in Slack Archive Conversation
When this happens in Trello... Card Moved to List (Legacy)

Do this in Slack Cancel Scheduled Message
When this happens in Trello... Card Updated

Do this in Slack Create Canvas

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