dav-mcp MCP Server

AI-orchestrated calendars, contacts & tasks across any DAV platform. 27 tools, field-agnostic.

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Status

Pod has not dialled dav-mcp yet, so everything on this page is what its publisher reported rather than what we observed. Registries describe servers; they do not connect to them. Until a check runs, treat the tool list below as a claim.

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Published as dav-mcp on npm. Runs locally.

Known issues

31 problems reported by people outside the maintainer team. Issues filed by the project's own owners, members and collaborators are excluded — those are release checklists and internal refactors, not things that will go wrong for you. Showing 12.

Most discussed

🐛 Critical: All TODO tools crash - client.fetchTodos is not a function

Summary

All TODO-related tools crash at runtime with . This affects every TODO operation in the system.

Root Cause

The code calls client.fetchTodos(), which does not exist in tsdav's DAVClient API.

tsdav's Actual API:

DAVClient.prototype = [
  'fetchCalendars',
  'fetchCalendarUserAddresses', 
  'fetchCalendarObjects',  // ← This is what we should use
  'fetchAddressBooks',
  'fetchVCards'
]

There is no fetchTodos method.

Affected Files (5 locatio

Read the thread · 2025-10-27 · closed · 3 comments

addressbook_query requires URL while calendar_query/todo_query support multi-search

Currently there's an inconsistency in how query tools handle multi-resource search:

• ✅ calendar_query & todo_query: Search ALL calendars when calendar_url is omitted
• ❌ addressbook_query: REQUIRES addressbook_url (cannot search across all addressbooks)

This is inconsistent and should be unified.

Proposed Solution

Make addressbook_url optional in addressbook_query to enable multi-addressbook search (like calendar_query)

Code References

• `src/tools/calendar/calendar-query

Read the thread · 2025-10-27 · closed · 3 comments

client.fetchTodos is not a function — tsdav 2.3.0 doesn't export fetchTodos

Bug: client.fetchTodos is not a function — tsdav 2.3.0 doesn't export fetchTodos

Environment

• dav-mcp version: 3.0.7 (latest on npm)
• tsdav version (bundled): 2.3.0 (git-pinned to PhilflowIO/tsdav#master)
• Node: 24.15.0
• macOS 26.4.1 (arm64)
• iCloud Reminders via CalDAV

Symptom

Every call to list_todos or todo_query tools fails with:

client.fetchTodos is not a function

Verified by grep "exports.fetchTodos" tsdav.cjs → 0 matches in the bundled

Read the thread · 2026-04-27 · closed · external user · 2 comments

Bug: Contact photos (PHOTO field) cause LLM context overflow

🐛 Problem

When contacts contain photos in the PHOTO field, the Base64-encoded image data is included in the LLM response, causing massive context overflow.

Location

src/formatters.js:372-377 in formatContactList()

Root Cause

The raw vCard data is included in the output for debugging:

output += JSON.stringify(contacts.map(c => ({
  url: c.url,
  etag: c.etag,
  data: c.data  // ← Contains full vCard with Base64 PHOTO!
})), null, 2);

A single contact photo can

Read the thread · 2025-11-13 · closed · 1 comment

LLM generates absurd time ranges in calendar_query despite required fields (120k token overflow)

Problem

Despite fixing #24 by making both time_range_start and time_range_end required fields, LLMs still generate absurd time ranges that cause token overflow.

Example Query

User asks: "When is my next appointment?"

LLM generates:

{
  "tool": "calendar_query",
  "query": {
    "time_range_start": "2025-10-31T10:35:42.459+01:00",
    "time_range_end": "2099-12-31T23:59:59.000Z"
  }
}

Result: 120k tokens consumed (just from holidays!) 💸

Root Cause

The LLM inter

Read the thread · 2025-10-31 · closed · 1 comment

Most recent

fields.DTEND on a DURATION-based event produces an illegal object

Split out of #43 rather than widening that PR.

update_event now has dedicated start_date/end_date/all_day parameters, and those correctly drop a stale DURATION when they write DTEND (RFC 5545 §3.6.1: dtend and duration MUST NOT occur in the same eventprop).

The older fields path does not. fields: { DTEND: "..." } on an event stored as DTSTART + DURATION goes through tsdav-utils' updateFields → updatePropertyWithValue('dtend', ...), which knows nothing about DURATI

Read the thread · 2026-08-14 · closed · 0 comments

tool-call-logger writes to stdout under stdio transport, corrupting the JSON-RPC stream

Symptom

Under the stdio transport, setting TOOL_CALL_LOG_MODE=console (or both) writes non-JSON-RPC lines onto stdout and corrupts the protocol stream.

Root cause

src/tool-call-logger.js:32-34 does an unconditional console.log(line.trim()) for those modes, and initializeToolCallLogger reads the mode from TOOL_CALL_LOG_MODE. src/server-stdio.js never redirects console and calls this logger on every tool call.

src/logger.js:62-64 already solves exactly this — `const

Read the thread · 2026-08-14 · closed · 0 comments

create_event and create_contact emit LF line endings; sanitizeICalString does not escape CR

Symptom

Two of the three iCal/vCard builders emit documents with bare LF line endings, and sanitizeICalString lets a raw CR through into property values. RFC 5545 §3.1 and RFC 6350 require CRLF.

sanitize("a\r\nX-EVIL:1") = "a\r\\nX-EVIL:1"   ← LF escaped, CR survives raw
sanitize("a\rX-EVIL:1")   = "a\rX-EVIL:1"

Read the thread · 2026-08-14 · closed · 0 comments

formatDateTime renders times in the server's timezone; Exchange TZIDs blank the date entirely

Symptom

formatDateTime renders event times in the server host's timezone rather than the event's, and in one case the rendered instant itself moves with the host's TZ.

Read the thread · 2026-08-14 · closed · 0 comments

Recurring events display the master DTSTART, not the occurrence in the queried range

Symptom

Asking "what's on my calendar next week" returns each recurring series exactly once, dated at its original series start — potentially years in the past — while the occurrence actually inside the queried window appears nowhere.

Probe, a FREQ=WEEKLY series with DTSTART:20260105T090000Z, queried for August 2026:

Found events: 1
### 1. Weekly standup
- **When**: January 5, 2026, 09:00 AM UTC to January 5, 2026, 10:00 AM UTC
- **Recurring**: FREQ=WEEKLY;BYDAY=MO

This is

Read the thread · 2026-08-14 · closed · 0 comments

Security: unvalidated fields map allows iCal/vCard property and component injection

Symptom

update_event, update_todo and update_contact accept a fields map that is validated only as z.record(z.string()) — no constraint on the key, none on the value. The map is passed to tsdav-utils' updateFields, which does updatePropertyWithValue(key.toLowerCase(), value) per entry, and the result is PUT to the server.

Because the caller of an MCP tool is an LLM that routinely handles untrusted text (a forwarded invite, a pasted email), "the caller wouldn't send that" is

Read the thread · 2026-08-14 · closed · 0 comments

All-day events not supported in dav_create_event and dav_update_event

The dav_create_event and dav_update_event tools cannot create or update all-day calendar events. They only support timed events, and fail if you try to anyway.

Expected Behavior

All-day events should be creatable (dav_create_event with date-only strings (e.g., 2026-08-12)), and editable ( dav_update_event with any parameter)

Actual Behavior

dav_create_event

Date-only input rejected: Passing date-only strings like 2026-08-12 fails validation:

{
  

[Read the thread](https://github.com/PhilflowIO/dav-mcp/issues/43) · 2026-08-11 · closed · external user · 0 comments

[See all 21 reports Pod holds for dav-mcp](/mcp/dav-mcp/issues) — of 31 qualified upstream.

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