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karti 35a0b2b715 feat: initial release with 48 Mattermost MCP tools

- 27 base tools: channels, messaging, users, reactions, files, DMs
- Team management: invite/remove users, get stats, list members
- Slash commands: execute /remind, /poll, etc.
- Webhook management: incoming and outgoing webhooks
- System tools: server config, logs, bulk status updates
- Channel admin: create, invite, leave, delete channels
- Read-only mode for safe exploration
- Dual token support (bot + PAT) for enhanced security
- Apache 2.0 licensed

2026-04-15 21:26:19 -07:00

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Changelog

All notable changes to the Mattermost MCP Server will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[1.0.0] - 2026-04-12

Added

Initial release of Mattermost MCP Server
Support for 22 MCP tools categorized as Read, Write, and Admin operations

Read Operations (11)

mattermost_list_channels - List accessible channels in a team
mattermost_get_channel_by_name - Get a channel by name in a team
mattermost_get_channel_info - Get detailed channel information including member count
mattermost_search_users - Search for users by username, email, or display name
mattermost_list_teams - List all teams the bot has access to
mattermost_search_posts - Search for posts/messages in a team using search terms
mattermost_get_thread - Read all messages in a thread conversation
mattermost_get_unread_count - Get unread message counts for all channels in a team
mattermost_mark_channel_read - Mark a channel as read (clear unread notifications)
mattermost_get_user_status - Get the online status of a user (online, away, dnd, offline)
mattermost_get_channel_messages - Read message history from a channel

Write Operations (8)

mattermost_send_message - Send a message to a channel or user
mattermost_edit_message - Edit an existing message
mattermost_delete_message - Delete a message from a channel
mattermost_create_dm - Create a direct message channel with a user
mattermost_add_reaction - Add an emoji reaction to a message
mattermost_remove_reaction - Remove an emoji reaction from a message
mattermost_upload_file - Upload a file to a channel or user
mattermost_download_file - Download a file from a message

Admin Operations (4)

mattermost_create_channel - Create a new channel (public or private) in a team
mattermost_invite_to_channel - Invite a user to a channel
mattermost_delete_channel - Delete/archive a channel (soft delete by default)
mattermost_leave_channel - Remove self from a channel

Features

Multiple authentication methods (Bot tokens, PAT, User tokens)
Read-only mode for safe exploration (--read-only flag)
Debug logging support (--debug flag)
Configuration via environment variables or CLI flags
Comprehensive error handling with descriptive messages
File upload security with validation and restrictions
Integration tests for core functionality
OpenClaw and Claude Code configuration support

Security

Path traversal prevention for file operations
Dangerous file extension blocking
File size limits (50MB maximum)
MIME type whitelist validation for uploads
Token-safe logging (tokens are never logged)
TLS verification enabled by default
--insecure flag available only for development/testing

[Unreleased]

Planned

WebSocket support for real-time notifications
Additional search capabilities (file search, user directory)
Message threading improvements
Bulk operations support
Rate limiting and throttling options
Extended file type support for uploads

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