Mattermost

CommunicationCredentials form

Post, read and search messages, manage channels and look up users on a Mattermost server.

14 actions

Action	Effect	Data handled
mattermost_list_teamsLists the teams the connected user belongs to, with their ids and names	read	General
mattermost_list_my_channelsLists the channels, including private channels and direct messages, the connected user belongs to in a team	read	General
mattermost_get_channel_by_nameFinds a channel in a team by its URL name, such as town-square	read	General
mattermost_create_channelCreates a public or private channel in a team	write	General
mattermost_create_postPosts a Markdown message in a channel, or as a reply in a thread when rootId is given	write	Personal data
mattermost_open_direct_channelOpens, or returns the existing, direct message channel between the connected user and another user	write	General
mattermost_get_channel_postsReads a channel's recent posts, newest first, as an order list and a posts map	read	Personal data
mattermost_get_threadReads a post and every reply in its thread	read	Personal data
mattermost_search_postsSearches a team's messages with Mattermost search syntax, such as 'from:alice in:town-square after:2026-01-01 deploy'	read	Personal data
mattermost_update_postChanges the text of a post the connected user may edit	write	Personal data
mattermost_delete_postDeletes a post	destructive	Personal data
mattermost_add_reactionReacts to a post as the connected user with an emoji name such as thumbsup	write	General
mattermost_search_usersSearches users by username, name, nickname or email, optionally within a team	read	Personal data
mattermost_get_user_by_usernameReads a user's profile by username	read	Personal data

Sign-in

Method: Credentials form
Multiple accounts: Supported

Also included

Proxy for any Mattermost endpoint
Available over MCP
Several accounts per customer

dexby.createSession({
  userId: customer.id,
  connectors: ['mattermost']
})