# io.github.robertdoneill/jmap-calendar-mcp (pypi · jmap-calendar-mcp)

Read calendars and create, change or (opt-in) delete events on any JMAP server, such as Stalwart.

- Trust score: 53/100 (low)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- pypi · `jmap-calendar-mcp`: 53/100 (this document), [markdown](https://verifymcp.io/servers/robertdoneill-jmap-calendar-mcp/jmap-calendar-mcp.md), [page](https://verifymcp.io/servers/robertdoneill-jmap-calendar-mcp/jmap-calendar-mcp)

## Channel facts

- Registry: `pypi`
- Package: `jmap-calendar-mcp`
- Version: `0.2.0`
- Transport: `stdio`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-11-05.

- **Supply Chain Security**: 50/100
  - Malware scan not yet available for this package.
  - No known CVEs affecting this package version or its production dependencies.
  - Runs setuptools.build_meta at install time, a recognised build step with no custom scripting around it.
  - No production dependencies, so there is no dependency health to assess.
- **Provenance & Transparency**: 45/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 4 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 68/100
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 489 tokens (~122/item across 4 items; 4 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 0/100
  - Stability not yet verified: not enough scan history yet (needs a 30-day window).
- **Tool Coverage**: 86/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 57% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 4 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 4 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

**Unverified: 1 category.** A category scored 0 because we could not verify it: a data source with nothing on this package, evidence we could not reach, or a check we could not run. We only credit what we can confirm.

## Install

### How do I install the io.github.robertdoneill/jmap-calendar-mcp server?

io.github.robertdoneill/jmap-calendar-mcp runs locally as a PyPI package, launched with uvx jmap-calendar-mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add robertdoneill-jmap-calendar-mcp -- uvx jmap-calendar-mcp
```

### Cursor

```json
{
  "mcpServers": {
    "robertdoneill-jmap-calendar-mcp": {
      "command": "uvx",
      "args": [
        "jmap-calendar-mcp"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "robertdoneill-jmap-calendar-mcp": {
      "command": "uvx",
      "args": [
        "jmap-calendar-mcp"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add robertdoneill-jmap-calendar-mcp -- uvx jmap-calendar-mcp
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "robertdoneill-jmap-calendar-mcp": {
      "type": "local",
      "command": [
        "uvx",
        "jmap-calendar-mcp"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add robertdoneill-jmap-calendar-mcp --command uvx --arg jmap-calendar-mcp
```

### Hermes

```yaml
mcp_servers:
  robertdoneill-jmap-calendar-mcp:
    command: "uvx"
    args: ["jmap-calendar-mcp"]
```

### Netclaw

```json
{
  "McpServers": {
    "robertdoneill-jmap-calendar-mcp": {
      "Transport": "stdio",
      "Command": "uvx",
      "Arguments": [
        "jmap-calendar-mcp"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add robertdoneill-jmap-calendar-mcp -t stdio -c uvx -a jmap-calendar-mcp
```

### Other

```json
{
  "mcpServers": {
    "robertdoneill-jmap-calendar-mcp": {
      "command": "uvx",
      "args": [
        "jmap-calendar-mcp"
      ]
    }
  }
}
```

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-11-05 (score 53, −15)

- [security regression] Malware scan: pass → unverified

### 2026-11-01 (score 68, +15)

- [security improvement] Malware scan: unverified → pass

### 2026-10-31 (score 53)

First indexed and scored.

## MCP tools (4)

### `list_calendars` (~24 tokens)

List the calendars this account can see, with which is the default.

### `find_calendar_events` (~91 tokens)

Find events between two times (default: the next 30 days), optionally matching text. Recurring events are expanded into their occurrences.

Input parameters:

- `after` (string): ISO date/time; UTC unless an offset is given
- `before` (string): ISO date/time; UTC unless an offset is given
- `calendar` (string)
- `limit` (integer)
- `text` (string)

### `create_calendar_event` (~191 tokens)

Create an event. Confirm title, time and time zone with the user first. Attendees are added without being emailed unless send_invitations is true.

Input parameters:

- `all_day` (boolean)
- `attendees` (array): Email addresses
- `calendar` (string): Calendar name or id; default calendar if omitted
- `days` (integer): Length of an all-day event, default 1
- `description` (string)
- `duration_minutes` (integer): Default 60
- `location` (string)
- `send_invitations` (boolean): Email invitations to attendees. Only when the user asked for it.
- `start` (string, required): Local start time, YYYY-MM-DDTHH:MM (a date alone for all-day)
- `time_zone` (string): IANA zone for a timed event, e.g. America/Chicago
- `title` (string, required)

### `update_calendar_event` (~183 tokens)

Change an existing event: give event_id and only the fields to change.

Input parameters:

- `all_day` (boolean)
- `attendees` (array): Email addresses
- `calendar` (string): Calendar name or id; default calendar if omitted
- `days` (integer): Length of an all-day event, default 1
- `description` (string)
- `duration_minutes` (integer): Default 60
- `event_id` (string, required)
- `location` (string)
- `send_invitations` (boolean): Email invitations to attendees. Only when the user asked for it.
- `start` (string): Local start time, YYYY-MM-DDTHH:MM (a date alone for all-day)
- `time_zone` (string): IANA zone for a timed event, e.g. America/Chicago
- `title` (string)

## Diagnostics

Captured diagnostic sections: Provenance, Install scripts, Dependencies. The full working is on the page: https://verifymcp.io/servers/robertdoneill-jmap-calendar-mcp/jmap-calendar-mcp#diagnostics

## Score history

- 2026-11-05: 53
- 2026-11-04: 68
- 2026-11-03: 68
- 2026-11-02: 68
- 2026-11-01: 68
- 2026-10-31: 53

## Common questions

### What is the io.github.robertdoneill/jmap-calendar-mcp server?

io.github.robertdoneill/jmap-calendar-mcp is listed in the public MCP registry as io.github.robertdoneill/jmap-calendar-mcp. Read calendars and create, change or (opt-in) delete events on any JMAP server, such as Stalwart. This page covers its PyPI package (jmap-calendar-mcp).

### Is the io.github.robertdoneill/jmap-calendar-mcp server safe to use?

io.github.robertdoneill/jmap-calendar-mcp scores 53 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 5 November 2026. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the io.github.robertdoneill/jmap-calendar-mcp server expose?

io.github.robertdoneill/jmap-calendar-mcp exposes 4 tools: list_calendars, find_calendar_events, create_calendar_event, update_calendar_event. Their descriptions and schemas cost roughly 489 tokens of context every time the server is loaded.

### Is the io.github.robertdoneill/jmap-calendar-mcp server still maintained?

io.github.robertdoneill/jmap-calendar-mcp is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

### What licence is the io.github.robertdoneill/jmap-calendar-mcp server under?

io.github.robertdoneill/jmap-calendar-mcp declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.

## Links

- PyPI project: https://pypi.org/project/jmap-calendar-mcp/
- Socket report: https://socket.dev/pypi/package/jmap-calendar-mcp
- Repository: https://github.com/robertdoneill/jmap-calendar-mcp
- Changelog RSS feed: https://verifymcp.io/servers/robertdoneill-jmap-calendar-mcp/jmap-calendar-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/robertdoneill-jmap-calendar-mcp/jmap-calendar-mcp.json
- HTML version of this page: https://verifymcp.io/servers/robertdoneill-jmap-calendar-mcp/jmap-calendar-mcp