Prompt
Which scheduling API works with Google Calendar and Outlook?
Latest observation
Sep 28, 2026
OpenAI APIWeb search: off
Several scheduling APIs can work with both Google Calendar and Outlook/Microsoft 365. Common options include:
- Cronofy — Built specifically for calendar integration across Google, Microsoft, and others.
- Nylas — Offers calendar sync and scheduling APIs for Google and Microsoft calendars.
- Microsoft Graph + Google Calendar API — If you want to build it yourself, you can integrate both directly.
- Cal.com API — Scheduling platform with integrations for Google and Microsoft calendars.
- ScheduleOnce (OnceHub) — Scheduling tool with calendar connectivity for both.
If you want the best fit, it depends on whether you need:
- simple booking links,
- two-way calendar sync,
- enterprise-grade scheduling,
- or a fully custom embedded scheduling flow.
If you want, I can compare Cronofy vs Nylas vs Cal.com for your use case.