Best Calendar & Scheduling APIs in 2026

Browse the top Calendar & Scheduling APIs used by developers worldwide.

7 APIs across 2 subcategories

Scheduling(5)

FreemiumScheduling

Calendly

Scheduling automation API for booking meetings with availability rules.

FreemiumScheduling

Cal.com

Open-source scheduling platform with API for booking and availability management.

FreemiumScheduling

Doodle

Group scheduling API for finding common availability across participants.

PaidScheduling

Acuity Scheduling

Appointment scheduling API with calendar sync and payment collection.

PaidScheduling

SavvyCal

Scheduling tool with prioritised availability and overlay calendars.

Calendar Integration(2)

FreemiumCalendar Integration

Nylas

Universal API for calendar, email, and contacts across providers.

npm i nylas

FreemiumCalendar Integration

Cronofy

Unified calendar API with scheduling, availability, and calendar sync.

npm i cronofy-node

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22 APIs · 8 subcategories

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16 APIs · 6 subcategories

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15 APIs · 7 subcategories

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15 APIs · 11 subcategories

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14 APIs · 6 subcategories

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13 APIs · 6 subcategories

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13 APIs · 10 subcategories

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12 APIs · 5 subcategories

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12 APIs · 7 subcategories

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12 APIs · 6 subcategories

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12 APIs · 7 subcategories

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12 APIs · 6 subcategories

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11 APIs · 6 subcategories

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10 APIs · 6 subcategories

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10 APIs · 3 subcategories

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9 APIs · 5 subcategories

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9 APIs · 6 subcategories

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8 APIs · 5 subcategories

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8 APIs · 3 subcategories

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7 APIs · 3 subcategories

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7 APIs · 5 subcategories

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6 APIs · 3 subcategories

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6 APIs · 3 subcategories

Realtime & WebSockets

6 APIs · 5 subcategories

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6 APIs · 2 subcategories

KYC & Identity

6 APIs · 1 subcategories

Feature Flags

6 APIs · 2 subcategories

Queue & Messaging

6 APIs · 6 subcategories

Image Processing

6 APIs · 5 subcategories

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6 APIs · 6 subcategories

Customer Support

6 APIs · 3 subcategories

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6 APIs · 4 subcategories

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6 APIs · 3 subcategories

Travel & Hospitality

5 APIs · 4 subcategories

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5 APIs · 3 subcategories

E-Signatures

5 APIs · 2 subcategories

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5 APIs · 2 subcategories

DNS

5 APIs · 3 subcategories

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5 APIs · 4 subcategories

Tax & Compliance

5 APIs · 4 subcategories

SEO & Web Analytics

5 APIs · 3 subcategories

Blockchain & Crypto

5 APIs · 4 subcategories

HR & Payroll

5 APIs · 4 subcategories

Weather

4 APIs · 2 subcategories

News & Content

4 APIs · 3 subcategories

Security

3 APIs · 3 subcategories