# vdirsyncer CalDAV and CardDAV Calendar and Contact Synchronizer > vdirsyncer is a command-line tool for synchronizing calendars and addressbooks between servers and the local filesystem via CalDAV and CardDAV protocols. It bridges remote calendar and contact servers with local tools like khal and khard. - Skill: `agentskillexchange/vdirsyncer-caldav-and-carddav-calendar-and-contact-synchroni` (Agent Skill) - Install (CLI): `npx skillmds@latest add agentskillexchange/vdirsyncer-caldav-and-carddav-calendar-and-contact-synchroni` - Raw SKILL.md: https://api.skillmd.com/api/skills/agentskillexchange/vdirsyncer-caldav-and-carddav-calendar-and-contact-synchroni/raw - Safety review: pending (external: skill-scanner PASS, skillspector PASS) - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Productivity - Author: agentskillexchange (https://skillmd.com/u/agentskillexchange) - Updated: 2026-09-08 - Page: https://skillmd.com/skills/agentskillexchange/vdirsyncer-caldav-and-carddav-calendar-and-contact-synchroni --- # vdirsyncer CalDAV and CardDAV Calendar and Contact Synchronizer vdirsyncer is a command-line tool for synchronizing calendars and addressbooks between servers and the local filesystem via CalDAV and CardDAV protocols. It bridges remote calendar and contact servers with local tools like khal and khard. ## Installation Use the upstream install or setup path that matches your environment: - Docker environment, you can check out the following GitHub Repository: Requirements and caveats from upstream: - :target: https://pypi.python.org/pypi/vdirsyncer - Note: This is an unofficial Docker build, it is maintained by Bleala _. Basic usage or getting-started notes: - Contact information - _ - How to contribute to this project - Source: https://github.com/pimutils/vdirsyncer - Extracted from upstream docs: https://raw.githubusercontent.com/pimutils/vdirsyncer/HEAD/README.rst ## Source - [Agent Skill Exchange](https://agentskillexchange.com/skills/vdirsyncer-caldav-carddav-sync/)