calendar-mcp (duanefields/dav-mcp) is an MCP server listed on the M8ven Trust Index. It scores 74 out of 100, grade C. It declares 12 tools. No publisher has claimed this listing.

Back to MCP Trust IndexM8ven
C
Emerging
74/100
9 days ago

calendar-mcp

An MCP server for Apple iCloud Calendar over CalDAV, supporting list, search, create, update, delete, RSVP, and free-time finding without local macOS dependencies.

→ duanefields/dav-mcp· listed on glama

Emerging. No concerning findings. Grades remain capped until the project builds reputation through adoption. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.

How we verified

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Who stands behind it

duanefields

Source: Glama

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Install from

Glamanot scored here

The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.

// key findings
✅
No credential exfiltration, no sensitive file access, no obfuscation
Static analysis found nothing flowing your secrets to unexpected places.
🔐
You'll be asked for 2 credentials: DAV_MCP_PASSWORD, APPLE_APP_PASSWORD
These are read from process.env at runtime. Make sure you trust where they’ll be sent.
// environment variables
To run this server yourself, you supply these values. They go in your own MCP client configuration and stay on your machine. The secret label means the value is sensitive, not that the server mishandles it.
configDAV_MCP_TRANSPORTstdio or http.
configDAV_MCP_HOSTHTTP bind address.
configDAV_MCP_PORTHTTP bind port.
configDAV_MCP_STATELESSfalse restores per-client sessions.
configDAV_MCP_AUTHnone or password. HTTP only.
🔐 secretDAV_MCP_PASSWORDShared password. Required when AUTH=password.
configDAV_MCP_BASE_URLPublic URL; becomes the OAuth issuer. Required when AUTH=password.
configDAV_MCP_STATE_DIRWhere OAuth state is persisted.
configDAV_MCP_DEFAULT_CALENDARCalendar create_event writes to when the caller names none, by id or display name.
configDAV_MCP_CALDAV_ROOTCalDAV entry point.
configDAV_MCP_CARDDAV_ROOT
configDAV_MCP_TIMEZONEIANA zone assumed when a caller omits timeZone.
configAPPLE_IDApple ID email. Required.
🔐 secretAPPLE_APP_PASSWORDis an app-specific password generated at
// quality suggestions

Tool annotations

No tools have read-only/destructive annotations

Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.

All four hints declared on every tool

12/12 tools missing one or more hints — list_calendars (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); search_events (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); find_free_time (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +9 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.

For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.

License file

No license file

Add a LICENSE file (MIT, Apache-2.0, etc.).

Claim the listing to review these findings one by one and send us a correction where you disagree, straight to the team. Claiming also means we tell you when the grade moves, and reach you first if we find anything urgent.

// full audit trail
The findings above are the summary. The full trail, every check we ran, each deduction, the network hosts observed and the dependency advisories, goes to verified publishers, along with an alert whenever a new one lands. Verified publishers can also review each finding and dispute it in one click. Publisher corrections have sharpened several of our checks this month, because the maintainer knows the codebase better than any scanner.
// improvement guidance — verified publishers only
We have 3 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.
// embed badge in your README
[![M8ven Score](https://m8ven.ai/badge/mcp/duanefields/dav-mcp)](https://m8ven.ai/mcp/duanefields/dav-mcp)
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commit: 90f14d14597e13cfe9cdcbf8f7da9e818a06e51a
code hash: 7ac815ee8ad747558d5f559a8d62646d07ac4783fb369cadb42415a7a446e331
verified: 9/2/2026, 5:56:18 PM
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