# dav-mcp MCP Server

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

**Publisher claimed.** No tool list reported, and Pod has not connected to this server.

## 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.

## Connect

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:
```javascript
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](https://github.com/PhilflowIO/dav-mcp/issues/27) · 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](https://github.com/PhilflowIO/dav-mcp/issues/23) · 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](https://github.com/PhilflowIO/dav-mcp/issues/41) · 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:
```javascript
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](https://github.com/PhilflowIO/dav-mcp/issues/33) · 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:
```json
{
  "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](https://github.com/PhilflowIO/dav-mcp/issues/32) · 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](https://github.com/PhilflowIO/dav-mcp/issues/56) · 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](https://github.com/PhilflowIO/dav-mcp/issues/48) · 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"
```

| Builder | Line endings |
|---|---|
| `src/tools/calendar/create-event.js:55-65` | bare LF |
| `src/tools/contacts/create-contact.js:65-70` | bare LF |
| `src/tools/todo

[Read the thread](https://github.com/PhilflowIO/dav-mcp/issues/47) · 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`.

| Event | Rendered under `TZ=UTC` | under `TZ=Europe/Berlin` | Verdict |
|---|---|---|---|
| `DTSTART:...Z` (UTC) | `02:00 PM UTC` | `04:00 PM GMT+2` | misleading — instant right, the `=== 'UTC'` branch never actually fires |
| `TZID=Europe/Berlin` + VTIMEZONE | `12:00 PM UTC` | `02:00 PM GMT+2` | misleading — a user 

[Read the thread](https://github.com/PhilflowIO/dav-mcp/issues/46) · 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](https://github.com/PhilflowIO/dav-mcp/issues/45) · 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](https://github.com/PhilflowIO/dav-mcp/issues/44) · 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:
   ```json
   {
     

[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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