Automate Slack & Calendly

Stop paying for mismatched spreadsheets. Sync data between Slack and Calendly 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 ["Slack"]
        T1(["Fetch Custom Actions"])
    end
    
    subgraph Middleware ["Enterprise Integration Core"]
        W[Webhook
Listener] --> V{Validation
& Auth}
        V -->|Fail| DLQ[Dead Letter
Queue]
        V -->|Pass| Map[Data Mapping
& Transformation]
        Map --> Retry[Rate Limiting
& Retries]
    end
    
    subgraph Target ["Calendly"]
        A1(["Book Meeting for Invitee"])
    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 a team member schedules a meeting in Calendly, the corresponding Slack channel does not receive an update about the event, leading to confusion and missed communications. For instance, if a sales representative books a demo with a client, the marketing team remains unaware and continues to push for the same time slot, resulting in double bookings. This situation forces team members to manually check Calendly for updates and communicate via Slack, wasting valuable time that could be spent on more productive tasks.

Top Ways to Automate Slack & Calendly

Automated Meeting Notifications: Instantly notify your Slack channels when a new meeting is scheduled through Calendly, ensuring everyone is informed and aligned without manual updates.
Seamless Rescheduling Alerts: Automatically send alerts in Slack when a meeting is rescheduled or canceled, minimizing confusion and keeping your team on the same page.
Quick Access to Availability: Enable team members to check each other's Calendly availability directly within Slack, streamlining the scheduling process and reducing back-and-forth communication.

How to Build the Slack → Calendly Sync

In Slack, create a new Incoming Webhook by navigating to Apps > Manage Apps > Custom Integrations > Incoming Webhooks. Choose the channel where notifications should be sent.
Copy the Webhook URL provided by Slack. This URL will be used to send notifications whenever a new event is created in Calendly.
In Calendly, access the Integrations section and select the Webhooks option.
Add a new webhook with the Slack Webhook URL you copied earlier. Configure it to trigger on the Event Created event.
In the payload sent to Slack, extract the event name, event start time, and event duration from the Calendly webhook data.
Format the extracted data into a message that includes the event name and time, and POST this message to the Slack Webhook URL.

Developer Warnings & API Gotchas

Ensure the payload from Calendly includes the correct time zone information; otherwise, the event times displayed in Slack may not match the intended schedule.
When formatting the message for Slack, be cautious with special characters in the event name, as they may not render correctly in the Slack message.
If multiple events are created in quick succession, ensure that the webhook can handle the load and that messages are sent in the correct order to avoid confusion in Slack.

Supported API Operations

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

When this happens in Slack... Fetch Custom Actions

Do this in Calendly Book Meeting for Invitee
When this happens in Slack... List Canvas Sections

Do this in Calendly Cancel Scheduled Event
When this happens in Slack... List Canvases

Do this in Calendly Cancel an Event
When this happens in Slack... List Channels available for User

Do this in Calendly Create Contact
When this happens in Slack... List Private Channels available for User

Do this in Calendly Create One-Off Meeting Link

SyncMatrix Experts

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