Fastmail MCP Server (Unofficial)
by leonietrinh
Server Configuration
Describes the environment variables required to run the server.
| Name | Required | Description | Default |
|---|---|---|---|
| FASTMAIL_BASE_URL | No | Optional: customize the Fastmail API base URL (defaults to https://api.fastmail.com). Only api.fastmail.com and www.fastmailusercontent.com are accepted by default, each with an optional regional prefix (phl.api.fastmail.com, phl-www.fastmailusercontent.com) as returned by JMAP session discovery. For self-hosted JMAP servers, also set FASTMAIL_ALLOW_UNSAFE_BASE_URL=true. | https://api.fastmail.com |
| FASTMAIL_API_TOKEN | Yes | Your Fastmail API token. Generate one in the Fastmail web interface under Settings → Privacy & Security → "Connected apps & API tokens" → "Manage API tokens" → "New API token". Required. | |
| FASTMAIL_WEBDAV_URL | No | Optional: WebDAV base URL for the save_attachment_to_webdav tool (e.g. Fastmail Files, Nextcloud). Required for save_attachment_to_webdav. | |
| FASTMAIL_DOWNLOAD_DIR | No | Optional: customize the attachment download directory (defaults to ~/Downloads/fastmail-mcp/). download_attachment savePaths are confined to this directory; set it to the root you want attachments saved under to write there directly in one step. | ~/Downloads/fastmail-mcp/ |
| FASTMAIL_CALDAV_PASSWORD | No | Optional: CalDAV password (app-specific password) for calendar tools (required for calendar operations). | |
| FASTMAIL_CALDAV_USERNAME | No | Optional: CalDAV username for calendar tools (required for calendar operations; use an app-specific password). Fastmail does not expose calendar access via JMAP API tokens, so CalDAV credentials are needed for calendar tools. | |
| FASTMAIL_WEBDAV_PASSWORD | No | Optional: WebDAV password for the save_attachment_to_webdav tool. Required for save_attachment_to_webdav. | |
| FASTMAIL_WEBDAV_USERNAME | No | Optional: WebDAV username for the save_attachment_to_webdav tool. Required for save_attachment_to_webdav. | |
| FASTMAIL_CALDAV_DISPLAY_NAME | No | Optional: CalDAV display name for calendar tools. | |
| FASTMAIL_ALLOW_UNSAFE_BASE_URL | No | Optional: set to true to allow self-hosted JMAP servers whose base URL is not api.fastmail.com / www.fastmailusercontent.com (or their regional prefixes). |
Instructions
Guidance the server publishes about itself, which clients place ahead of the tool catalog so the model reads it before choosing anything.
This server publishes no instructions, or was last inspected before Glama recorded them.
Capabilities
Server capabilities have not been inspected yet.
Tools
Functions exposed to the LLM to take actions
| Name | Description |
|---|---|
No tools | |
Prompts
Interactive templates invoked by user choice
| Name | Description |
|---|---|
No prompts | |
Resources
Contextual data attached and managed by the client
| Name | Description |
|---|---|
No resources | |
This server cannot be deployed
Maintenance
ActivityActive
ResponsivenessNo issues