---
title: "Keeper"
pageType: "tool-profile"
schemaVersion: "1.0"
snapshotId: "tv-20260915-f4c107995a2e"
generatedAt: "2026-09-15T07:02:20.000Z"
canonicalUrl: "https://toolvitals.com/tools/keeper/"
jsonUrl: "https://toolvitals.com/api/agent/tools/keeper"
indexable: true
---

# Keeper

Calendar sync tool & universal calendar MCP server. Aggregate, sync and control calendars on Google, Outlook, Office 365, iCloud, CalDAV or ICS.

## Decision context

- Status: active
- ToolVitals score: 94/100
- Health score: 94/100
- Shipping score: 95/100
- Score mode: verdict
- Data confidence: 90/100
- Source coverage: 90/100
- Last evidence check: 2026-09-15

## Classification

- Use case: Personal Productivity (personal-productivity)
- Category: Productivity (productivity)
- Tool mode: Source-visible project
- Openness: OSI-approved OSS
- License: AGPL-3.0
- Tags: open-source, bun, caldav, calendar, calendar-sync, google-calendar, ical, icloud, ics, mcp, mcp-server, nextjs, outlook, self-hosted, sync, typescript

## Public repository signals

- Repository: [ridafkih/keeper.sh](https://github.com/ridafkih/keeper.sh)
- Stars: 1330 (adoption context only)
- Forks: 55
- Open issues: 151
- Last commit date: 2026-09-15
- Releases in 90 days: 30

## Source receipts

- [Official website](https://keeper.sh/) — checked 2026-09-15
- [Source repository](https://github.com/ridafkih/keeper.sh) — checked 2026-09-15

## Discovery status

- Search indexable: yes
- Reason: sufficient tool evidence

## Interpretation limits

- ToolVitals scores summarize bounded public maintenance, shipping, openness, and evidence signals. They are not user-review ratings.
- GitHub stars and related popularity metrics are adoption context, not quality evidence.
- Missing values mean not collected or not confidently established; they do not mean zero.
- Public signals do not prove security, uptime, support quality, customer satisfaction, or production suitability.
- Verify material decisions against the linked first-party sources and your own requirements.