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Open Sunsama
What it is
Open Sunsama is a task manager and daily planner organized around a board of days and calendar time blocking. Tasks can move from a backlog to a daily board, with unfinished work carried over to the next day. Focus mode runs a timer that compares actual time with a task estimate. The planner syncs with Google Calendar, Outlook, and iCloud, and supports multiple accounts; time blocks stay in Open Sunsama rather than being copied to Google or Outlook calendars. A hosted MCP server connects with Claude, ChatGPT, Cursor, and other MCP clients through OAuth, providing 24 tools. Its REST API covers tasks, subtasks, and time blocks, with selectable API-key scopes. Users can self-host the web app, API, MCP server, and PostgreSQL database with Docker Compose, subject to requirements of Docker 20.10 or newer, Compose 2.24 or newer, and 2 GB of RAM. The non-commercial license covers personal use and several non-commercial settings; companies need a commercial license for production. It works in a phone browser, but there is no native phone app. Desktop apps for Mac, Windows, and Linux connect to the hosted service. The product is free for personal use and open source.
For and against
For
- Daily board carries unfinished tasks into tomorrow.
- Focus timer compares actual time with estimates.
- Syncs Google Calendar, Outlook, and iCloud.
- Self-hosting includes the web app, API, MCP server, and database.
- Free for personal use.
Against
- No native phone app yet.
- Companies need a commercial license for production use.
- Self-hosting requires specified Docker, Compose, and memory levels.
- No one-click export button yet.
The verdict
Open Sunsama centers daily planning on task boards and calendar time blocks, with focus timing and calendar sync. Check the mobile, self-hosting, licensing, and export limits against your needs.
Who it suits
Open Sunsama suits people who plan each day with time blocks and want an AI agent to assist. It may fit users who are comfortable with a phone browser or self-hosting, and those using the planner for non-commercial purposes.
Plans and prices
Free
all features · time blocking · calendar sync · focus mode
Read 15 Oct 2026 · opensunsama.com
Personal use / hosted app or self-hosted
Free for personal use · For-profit production use and commercial resale require a commercial license · No one-click export button yet
Read 7 Oct 2026 · opensunsama.com
On the record
- AI connector
- A hosted MCP endpoint lets Claude, ChatGPT, Cursor, VS Code, Claude Code, and other MCP clients read and modify plans after OAuth authorization.opensunsama.com · read 15 Oct 2026
- AI integrations
- The hosted MCP server supports Claude, ChatGPT, Cursor and other MCP clients through OAuth and provides 24 tools.opensunsama.com · read 7 Oct 2026
- API
- The REST API covers tasks, subtasks and time blocks and uses API keys with selectable scopes.opensunsama.com · read 7 Oct 2026
- API scopes
- Documented scopes include tasks:read/write, time-blocks:read/write, ideas:read/write, calendar:read, and user:read/write.npmjs.com · read 15 Oct 2026
- Calendar integrations
- The product states that Google Calendar, Outlook, and iCloud calendars synchronize with its timeline.opensunsama.com · read 15 Oct 2026
- Calendar privacy
- Time blocks remain in Open Sunsama and are not copied to Google or Outlook calendars.opensunsama.com · read 7 Oct 2026
- Calendar sync
- Yesopensunsama.com · read 20 Sep 2026
- Commercial restriction
- For-profit production use, resale, and commercial products require an enterprise license obtained from Circo.github.com · read 15 Oct 2026
- Current repository activity
- The GitHub repository page shows five open issues and ten open pull requests.github.com · read 15 Oct 2026
- Daily planning
- Tasks can be dragged between day columns, assigned P0 through P3 priorities, given estimates, and broken into subtasks.opensunsama.com · read 15 Oct 2026
- Data export
- Self-hosted data can be copied with pg_dump, while hosted tasks and time blocks can be retrieved through the API; there is no one-click export button yet.opensunsama.com · read 7 Oct 2026
- Desktop availability
- Downloadable desktop applications are offered for macOS, Windows, and Linux.opensunsama.com · read 15 Oct 2026
- Desktop support
- Desktop apps are available for Mac, Windows and Linux and connect to the hosted service.opensunsama.com · read 7 Oct 2026
- Developer stack
- The repository describes React/Vite web code, Hono and Drizzle on the API, PostgreSQL, Tauri desktop wrappers, and Expo React Native mobile code.mdskills.ai · read 15 Oct 2026
- Documentation depth
- Public documentation includes quick-start instructions, API and MCP guidance, calendar setup, Docker deployment, backups, updates, and keyboard shortcuts.opensunsama.com · read 15 Oct 2026
- External MCP assessment
- mdskills.ai rates the Open Sunsama MCP server 7.3 as an intermediate, verified skill and says it has extensive API documentation but limited installation and troubleshooting guidance.mdskills.ai · read 15 Oct 2026
- External MCP permissions
- The mdskills.ai listing says the MCP skill requests filesystem read/write, shell execution, network access, and Git write permissions.mdskills.ai · read 15 Oct 2026
- Focus mode
- Focus mode displays one task with a timer and records actual time against the estimate.opensunsama.com · read 15 Oct 2026
