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Connect Calendly to Slack

Technical Integration Guide & Cost Analysis

Integration Status

Calendly offers a native integration with Slack. For most standard use cases (basic contact sync, simple order transfer), this built-in connection is sufficient and free.

Data Flow Architecture

Calendly Calendly
→ One-Way
Standard API Latency
Slack Slack
API Tier
REST API v3
Auth Method
OAuth 2.0
Rate Limits
Standard SaaS Limits

Integration Overview

Connect Calendly to Slack and automate meeting scheduling, eliminating manual entry and streamlining team communication with real-time notifications and updates.

Primary Use Case

Sync Calendly meeting invites and updates to Slack channels for real-time team notifications and automated scheduling.

Setup Complexity

medium

Typical Setup Time

30 minutes

Frequently Asked Questions

How do I connect Calendly to Slack?

There's no native integration. To connect them, you will need a middleware tool like Make or n8n.

Is the connection between Calendly and Slack secure?

Yes. This integration typically uses OAuth 2.0, meaning you grant permission via a secure login window. You do not need to share your raw password, and you can revoke access at any time from your Calendly security settings.

Is the sync one-way or two-way?

This is typically a one-way sync: Calendly → Slack. Changes in Slack do not sync back to Calendly.

Will existing data in Calendly sync to Slack?

Usually, no. Most native integrations are "forward-looking," meaning they only sync data created or updated *after* you activate the connection. To move historical data, you will likely need to perform a one-time CSV export/import manually.

Can I sync custom fields?

Native integration is limited to standard fields. For custom field mapping, use an automation tool.

Can I add approval steps before syncing?

Native integrations can't do this. For workflows that need human review (e.g., "Manager must approve before creating invoice"), use Relay.app.