calBLOCK
Self-hosted daily toolkit — calendar, tasks, notes, links, files, kanban boards, time tracking, GitHub inbox. One Docker container.
Overview
From the repository's own README, as read at the audited commit. Badges and raw HTML are left out.
Cal
The self-hosted daily toolkit people actually enjoy opening. Calendar, tasks, notes, links, files, kanban, time tracking and a GitHub inbox — one quiet place, on your own hardware.
Quick Start • Screenshots • Features • Roadmap • Contributing
calhq.vercel.app — landing page
Cal is an open-source personal planner that replaces a handful of SaaS tabs. Month, week and day views with drag-and-drop; tasks with recurrence and natural-language quick add; markdown notes with wikilinks; kanban boards whose cards are real calendar entries; a focus timer and billable timesheets; a private relationship manager whose birthdays surface on the calendar. No accounts on someone else's server — one container and it's yours.
Screenshots
b3a8eec163a2OBSERVED · 2026-10-12Connect
Built from this server's own package name, version and transport as found in its source — not copied from anyone's documentation, so it cannot drift against a page we do not control.
claude mcp add api-client -- npx -y @cal/[email protected]
{
"mcpServers": {
"api-client": {
"command": "npx",
"args": [
"-y",
"@cal/[email protected]"
]
}
}
}Exposed tools (1)
1 read · 0 write · 0 destructive.
| Tool | Risk | Description |
|---|---|---|
Cal | read | Self-hosted minimal planner |
Trust audit
BLOCKgrade D · trust 69/100 Do not install this without reading the findings. The audit found something that could harm you or your machine.
| Layer | What it checks | Result |
|---|---|---|
| L0 | Provenance & inventory | WARN |
| L1 | Static analysis of the code | FAIL |
| L2 | Instruction surface (what it tells the agent) | PASS |
| L3 | Class-specific surface | PASS |
| L4 | Behavioural (sandbox) | SKIPPED |
What the source does
- Filesystem
- declared (7 observation(s))
- Network
- declared (6 observation(s))
- Shell
- declared (1 observation(s))
- Dependencies
- not all pinned
- Secrets in source
- found
Findings (11)
DATABASE_URL=postgres://cal:cal@localhost:5432/cal?sslmode=disable
welcome.bmp
gradle-wrapper.jar
for _, p := range []string{"http://localhost", "https://localhost", "http://127.0.0.1", "https://127.0.0.1", "http://[::1]", "https://[::1]"} {DATABASE_URL='postgres://cal:cal@localhost:5433/cal?sslmode=disable' /tmp/cal
const root = join(dirname(fileURLToPath(import.meta.url)), "../../..");
const raw = atob((base64 + padding).replace(/-/g, "+").replace(/_/g, "/"));
@capacitor/android, @capacitor/core, @capacitor/ios, @fontsource-variable/fraunces, @fontsource-variable/inter, @vitejs/plugin-react, framer-motion, lucide-react
typescript
typescript
curl -fsSL https://raw.githubusercontent.com/Dvorinka/cal/main/install.sh | sh
Gates applied: no_behavioural_pass.
b3a8eec163a2full audit observations/trust-audit/mcp-server/dvorinka__cal.json · Report an issue / request a re-scanAudit history
Every audit this server has had. A grade with a past is a grade somebody is still checking.
| Date | Source | Verdict | Grade | Score | Change |
|---|---|---|---|---|---|
| 2026-10-12 | b3a8eec163a2 | BLOCK | D | 69 | first audit |
Questions
What is the cal MCP server?
Self-hosted daily toolkit — calendar, tasks, notes, links, files, kanban boards, time tracking, GitHub inbox. One Docker container.
What tools does cal expose?
1 in total: 1 read-only, 0 that write, and 0 that can delete or overwrite. Every one is listed on this page with its risk.
Is cal safe to connect to an agent?
No — not without reading the findings first. The audit graded it D (69/100) and found 1 critical or high issue in the source. Each one is listed on this page with the file and line it is on.
What credentials does cal need?
No credential environment variables were found in its source, so it appears to need none.
How current is this page?
The grade is for one exact copy of the source (b3a8eec163a2), read on 2026-10-12. The repository is watched and re-audited when it changes.