For developers and teams building products with scheduling
Add scheduling to your product in days, not months.
Calendar integration, real-time availability, timezone handling, conflict detection — scheduling is a deceptively complex engineering problem. KalendMe is production-grade scheduling infrastructure you can consume via API today, so your team ships product instead of rebuilding solved problems.
Scheduling looks simple. It isn't.
The MVP takes a sprint. The edge cases take a year. Calendar quirks, timezone bugs, and race conditions on slot availability will delay your actual product far longer than you planned.
Calendar integration is a multi-month project on its own.
Google Calendar, Outlook, and Office 365 each have different APIs, auth flows, webhook formats, and edge cases. Supporting all three correctly is months of engineering — before you've written a single line of your real product.
Timezone logic breaks in ways you won't anticipate.
DST transitions, user-specific timezone preferences, UTC storage, display conversion, availability overlap across zones — every layer adds bugs. Teams underestimate this by 10×, every time.
Real-time availability calculation doesn't scale naively.
Cross-referencing busy slots, buffers, minimum notice, and multi-user overlap efficiently requires data structures most products don't want to reinvent. The edge cases compound fast at scale.
What if your team never had to think about calendar infrastructure again?
KalendMe is a complete scheduling backend accessible via clean REST API. We handle calendar sync across Google, Microsoft, and CalDAV. We calculate availability in real time. We detect timezones, send reminders, and manage conflicts. Your team gets full API access to build any scheduling experience your product needs — in your UI, your brand, your users.
Days
To integrate
A full scheduling integration via KalendMe API takes days, not the months it would take to build from scratch.
12
Calendars per user
Each user can connect up to 12 calendar accounts across Google, Outlook, and Office 365 simultaneously.
3
Calendar providers
Google Calendar, Microsoft Outlook, and Office 365 — all resolved through a single unified API.
Everything you need. Nothing you don't.
Every feature. Available via API.
Every KalendMe capability is exposed through a clean REST API. Create links, query availability, create bookings, manage users, configure event types — all programmatically. Build completely custom scheduling experiences in your product, powered by KalendMe under the hood.
React to every booking event in real time.
Subscribe to booking events — created, rescheduled, cancelled — and trigger workflows instantly. Update your CRM, provision user accounts, send custom notifications, or kick off onboarding sequences. Full event payload with all booking metadata included.
Your product. Your brand. Zero KalendMe.
Remove all KalendMe branding entirely. Embed scheduling flows natively inside your product. Customize colors, fonts, and URLs to match your design system. Your users experience great scheduling — they never know KalendMe is involved.
Connect your stack without custom code.
For workflows that don't need a custom integration, Zapier connects KalendMe to 700+ apps instantly — CRMs, project management tools, communication platforms, data warehouses. Booking events flow into your existing stack without engineering lift.
Up and running in minutes.
Get your API keys
Sign up, access your credentials, and explore our docs. We have SDKs, Postman collections, and working code examples for the most common use cases.
Build your scheduling experience
Use our API to create links, query availability, and handle bookings. Embed our booking UI or build your own on top of our availability endpoints.
Scale with your product
As your user base grows, KalendMe scales with it. Enterprise plans include custom SLAs, dedicated technical support, and tailored infrastructure arrangements.
We worked with KalendMe to create a custom scheduling integration for Rappi, which was delivered in less than 2 weeks, and allowed us to schedule hundreds of meetings with our experts — generating six-digit revenue from a single campaign.
Alex Sandoval
Head of Product, Advertising & Analytics, Rappi
Common questions
Is there a sandbox environment for testing?
What calendar providers does the API support?
Can I white-label the booking experience completely?
What onboarding support is available?
Stop building scheduling. Start shipping product.
Your engineering team's time is worth more than calendar infrastructure.
Premium API access available. Talk to us about enterprise plans.