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Kalendis

Kalendis

API Tools & Testing

Kalendis is an API-first scheduling backend. You keep your UI; we handle the gnarly parts (recurrence, time zones, DST, conflict-safe bookings). What it does: • MCP tool: generates typed clients and API route handlers (Next.js/Express/Fastify/Nest) so you can scaffold calls straight f

What is Kalendis?

Kalendis is an API-first scheduling backend designed to handle the complex infrastructure behind booking and calendar management. Rather than replacing a user interface, Kalendis integrates with existing applications by managing the backend logic for recurrence patterns, timezone handling, daylight saving time adjustments, and conflict-safe bookings. The platform uses Model Context Protocol (MCP) tooling to generate typed clients and route handlers for popular frameworks including Next.js, Express, Fastify, and Nest. This allows developers to scaffold API calls and integrate scheduling functionality without building these systems from scratch. Kalendis supports client generation for multiple languages including TypeScript, Python, Rust, and Go, plus React components. Kalendis is built with enterprise-grade security requirements in mind and is available as open source software. The service offers a free tier with 3,000 API calls to help developers evaluate the platform before scaling up. It targets developers and teams building applications that require reliable scheduling functionality without the burden of implementing complex scheduling logic independently.

Key Features

  • API-first scheduling backend handling recurrence, time zones, DST, and conflict-safe bookings
  • MCP tool generating typed clients and API route handlers for Next.js, Express, Fastify, and Nest
  • Multi-language code generation supporting TypeScript, Python, Rust, and Go
  • Enterprise-grade security with free tier of 3,000 API calls
  • Keep your existing UI while Kalendis manages complex scheduling logic
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Free · 2-minute setup · No credit card

Kalendis Pricing

Open source

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