Enable Captcha on Booking Page

In Cal ID, the Enable captcha on Booking page feature is a vital security layer designed to protect your calendar from automated spam bots and malicious booking scripts.

• Bot Mitigation: Prevents automated bots from flooding your schedule with fake appointments, ensuring your availability is reserved for real clients.
• Protect Public Links: Essential for "Discovery Calls" or public booking links that are easily accessible to web scrapers.
• Prevent "Denial of Service" on Slots: Bots can be used to "snatch" every available slot in seconds to prevent others from booking. Captcha blocks these scripts.
• Clean Data: Keeps your dashboard and connected CRM free from junk data and "trash" leads.

1. Log in to Cal ID account
2. Go to Event Types: Select the specific event you want to protect.
3. Navigate to Advanced: Click on the Advanced tab in the top navigation bar.
4. Toggle Captcha: Locate the Enable captcha on booking page option and switch it to ON.

5. Select Captcha Strength: Once enabled, a new dropdown field will appear labeled Select captcha strength. Choose the level that fits your needs:

• Low: Minimal friction; only challenges highly suspicious traffic.
• Medium: The standard balance between security and user experience.
• High: Strict verification; more likely to present visual challenges (like selecting traffic lights) to all users.

6. Save: Click the blue Save button at the top right.

• Frictionless Experience: Cal ID uses advanced reCAPTCHA technology. For most users, the check happens silently in the background without them having to do anything.
• Interactive Challenges: If the guest's browser behavior appears "bot-like," the system will present a visual or audio challenge (e.g., "Select all crosswalks") that they must solve before clicking "Confirm Booking".
• Strength Impact: At High strength, the system is much more sensitive, which increases security but may cause slight delays for legitimate users.

If you are using Requires booker email verification alongside Captcha, your booking page will be extremely secure. However, keep in mind that every extra step (Captcha + Email Verification) adds "friction." For internal team links or private 1-on-1s, we recommend keeping these settings at Medium or Low to ensure a smooth booking flow.

Updated on: 29/01/2026