Mattermost n8n integrationAutomate Mattermost with n8n.

Adds one existing Mattermost user to a channel they are not yet a member of, without going through an invite link.

• Channel Name or ID: the channel to add the user to, picked from the dropdown or set with an expression, the {{ }} syntax that reads a value off the incoming item, as in {{ $json.channelId }}.
• User Name or ID: the user to add, picked the same way, often from a previous user.getByEmail step.

Creates a new Mattermost channel inside a team, public or private.

• Team Name or ID: the team the channel belongs to.
• Display Name: the name shown in the channel list, for example Announcements.
• Name: the unique handle used in the channel's URL, for example announcements, lowercase and without spaces.
• Type: choose Public, open to the whole team, or Private, visible only to members added to it.

Soft deletes a channel: Mattermost marks it as deleted rather than erasing it outright, so it can be brought back later.

• Channel Name or ID: the channel to remove, picked from the list or passed as an ID.

Reads back who actually sits in a channel, one page at a time.

• Team Name or ID and Channel Name or ID: both are required here, where channel.delete and channel.statistics ask for the channel alone.
• Resolve Data: off by default, n8n only returns each member's ID; switch it on to get the full user object for every member in the same call.
• Return All: unchecked, n8n stops at Limit; checked, it pages through every member.

Brings back a channel previously removed with channel.delete.

• Channel ID: unlike the other channel operations, this one is a plain string field, not a dropdown, so the exact ID has to be supplied directly rather than picked from a list.

Searches for channels inside one team by matching text against the channel name.

• Team Name or ID: the team to search in.
• Search Term: the text to match, for example General.
• Return All and Limit: the same pagination behavior as the other list operations, useful once a team has more channels than fit on one page.

Returns a quick usage snapshot for one channel, without opening Mattermost itself and without counting anything by hand.

• Channel Name or ID: the channel to read statistics for, picked from the dropdown or passed as an ID.

Marks a post as deleted in the database instead of erasing it, the same treatment channel.delete gives a channel.

• Post ID: the ID of the post to delete, typed in or passed through an expression, since this field has no dropdown to pick from.

Posts a message into a channel, with plain text or a richer attachment.

• Channel Name or ID: the destination channel.
• Message: the text of the post, and not a required field; only Channel Name or ID is, so a post can carry an attachment and no text at all.
• Parent Post ID: set it to reply in a thread instead of starting a new post.
• Color and Fallback Text: inside Attachments, the color bar down the left edge and the required plain-text summary shown when the rich formatting cannot render.

One person sees this message and nobody else, since nothing is stored for the rest of the channel.

• User Name or ID: the only person who will see the message.
• Channel Name or ID: the channel the message appears in, for that one person.
• Message: the text to show.

Adds an emoji reaction to an existing post.

• User Name or ID: the user the reaction is posted as.
• Post ID: the post to react to, the string that follows /pl/ in its permalink.
• Emoji Name: the emoji to use, without the surrounding colons.

Removes one specific reaction from a post, leaving every other reaction on that post exactly as it was.

• User Name or ID: whose reaction to remove.
• Post ID: the post the reaction sits on, read from the /pl/ part of its permalink.
• Emoji Name: the exact emoji to remove; other reactions on the same post stay untouched.

Reads back the reactions on a post, or on a whole batch of posts at once.

• Post ID: one post ID, or several separated by commas, to read reactions from in a single call.
• Return All and Limit: the same pagination as the other list operations, useful on a post with a long reaction list.

Adds a new Mattermost user account, with just a username or a full profile.

• Username: the only required field.
• Email and Password: needed together for email authentication; Auth Service switches to LDAP, SAML, Google, Office365, or Gitlab instead.
• First Name, Last Name, Nickname: inside Additional Fields, the profile details shown next to every post.

Deactivates a user and revokes every one of their active sessions by archiving the user object; unlike a delete, the account and its history stay in place.

• User ID: the account's GUID, not the username, usually read from a previous user.getByEmail step.

Looks up a single Mattermost user account from their email address, returning the full user object rather than just an ID.

• Email: the address to search for, matched exactly, for example name@email.com.

Fetches a single user's full profile from their ID, everything channel.members leaves out when Resolve Data is off.

• User IDs: the label reads plural, the operation returns one user, so a single ID goes in the field.
• Since: inside Additional Fields, only returns the user if their profile changed after this Unix timestamp, given in milliseconds.

Pulls the user directory off the server, with no required field to fill in.

• Return All and Limit: the same pagination as the other list operations.
• In Channel and In Team: inside Additional Fields, narrow the list to one channel or team instead of the whole server.
• Not In Channel and Not In Team: the mirror filters, for listing the people a channel or a team is still missing.
• Sort: order by username, status, createdAt, or lastActivityAt.

Invites one or more people to a Mattermost team by email, the step that turns an address into an account once someone accepts. The invite covers the team; getting that person into a channel still runs through channel.addUser.

• Team Name or ID: the team the invite is for.
• Emails: one address, or several separated by commas, sent in a single call.