Can I use Mattermost as a CLI?

Yes. KosmoKrator exposes a Mattermost CLI through kosmo integrations:call and the provider shortcut command. Commands can return JSON for scripts, CI, and coding agents.

Can I expose Mattermost through MCP?

Yes. The KosmoKrator MCP gateway can expose selected Mattermost tools to clients such as Claude Code, Cursor, Codex, and other MCP-compatible tools.

Where are Mattermost credentials stored?

Mattermost credentials are configured in KosmoKrator's local integration settings and reused by CLI, Lua, and MCP gateway surfaces.

Can I deny write access for Mattermost MCP tools?

Yes. Start the gateway with --write=deny for read-only clients, or use ask/allow only for trusted workspaces.

communication

Mattermost CLI for AI Agents

Use the Mattermost CLI from KosmoKrator to call Mattermost tools headlessly, return JSON, inspect schemas, and automate workflows from coding agents, scripts, and CI.

7 functions 6 read 1 write Bearer token auth

Submit Mattermost feedback View package source

Mattermost CLI Setup

Mattermost can be configured headlessly with `kosmokrator integrations:configure mattermost`.

# Install KosmoKrator first if it is not available on PATH.
curl -fsSL https://raw.githubusercontent.com/OpenCompanyApp/kosmokrator/main/install.sh | bash

# Configure and verify this integration.
kosmokrator integrations:configure mattermost --set access_token="$MATTERMOST_ACCESS_TOKEN" --enable --read allow --write ask --json
kosmokrator integrations:doctor mattermost --json
kosmokrator integrations:status --json

Credentials

Authentication type: Bearer token bearer_token. Configure credentials once, then use the same stored profile from scripts, coding CLIs, Lua code mode, and the MCP gateway.

Key	Env var	Type	Required	Label
`access_token`	`MATTERMOST_ACCESS_TOKEN`	Secret `secret`	yes	Access Token
`url`	`MATTERMOST_URL`	URL `url`	no	Server URL

Call Mattermost Headlessly

Use the generic call form when another coding CLI or script needs a stable universal interface.

kosmo integrations:call mattermost.mattermost_list_channels '{
  "page": 1,
  "per_page": 1
}' --json

Use the provider shortcut form for shorter human-facing commands.

kosmo integrations:mattermost mattermost_list_channels '{
  "page": 1,
  "per_page": 1
}' --json

Agent Discovery Commands

These commands return structured output for coding agents that need to inspect capabilities before choosing a function.

kosmo integrations:docs mattermost --json
kosmo integrations:docs mattermost.mattermost_list_channels --json
kosmo integrations:schema mattermost.mattermost_list_channels --json
kosmo integrations:search "Mattermost" --json
kosmo integrations:list --json

All CLI Functions

Every function below can be called headlessly. The generic form is stable across all integrations; the provider shortcut is shorter but specific to Mattermost.

`mattermost.mattermost_list_channels`

Read read

List channels the current user belongs to in Mattermost. Returns channel IDs, names, types, and team associations. Use this to discover available channels before posting messages or reading posts.

Parameters: page, per_page

Generic CLI call

kosmo integrations:call mattermost.mattermost_list_channels '{"page":1,"per_page":1}' --json

Provider shortcut

kosmo integrations:mattermost mattermost_list_channels '{"page":1,"per_page":1}' --json

`mattermost.mattermost_get_channel`

Read read

Get details of a specific Mattermost channel by ID. Returns channel name, display name, type, header, purpose, and member counts.

Parameters: channel_id

Generic CLI call

kosmo integrations:call mattermost.mattermost_get_channel '{"channel_id":"example_channel_id"}' --json

Provider shortcut

kosmo integrations:mattermost mattermost_get_channel '{"channel_id":"example_channel_id"}' --json

`mattermost.mattermost_create_post`

Write write

Post a message to a Mattermost channel. Provide the channel_id and the message text. Returns the created post with its ID and timestamp.

Parameters: channel_id, message

Generic CLI call

kosmo integrations:call mattermost.mattermost_create_post '{"channel_id":"example_channel_id","message":"example_message"}' --json

Provider shortcut

kosmo integrations:mattermost mattermost_create_post '{"channel_id":"example_channel_id","message":"example_message"}' --json

`mattermost.mattermost_list_posts`

Read read

List posts in a Mattermost channel. Returns post IDs, messages, author info, and timestamps. Use page and per_page for pagination.

Parameters: channel_id, page, per_page

Generic CLI call

kosmo integrations:call mattermost.mattermost_list_posts '{"channel_id":"example_channel_id","page":1,"per_page":1}' --json

Provider shortcut

kosmo integrations:mattermost mattermost_list_posts '{"channel_id":"example_channel_id","page":1,"per_page":1}' --json

`mattermost.mattermost_get_post`

Read read

Get a specific Mattermost post by ID. Returns the full post including message content, author, channel, and timestamps.

Parameters: post_id

Generic CLI call

kosmo integrations:call mattermost.mattermost_get_post '{"post_id":"example_post_id"}' --json

Provider shortcut

kosmo integrations:mattermost mattermost_get_post '{"post_id":"example_post_id"}' --json

`mattermost.mattermost_list_teams`

Read read

List teams the current user belongs to in Mattermost. Returns team IDs, names, display names, and types. Use this to discover available teams before working with channels.

Parameters: page, per_page

Generic CLI call

kosmo integrations:call mattermost.mattermost_list_teams '{"page":1,"per_page":1}' --json

Provider shortcut

kosmo integrations:mattermost mattermost_list_teams '{"page":1,"per_page":1}' --json

`mattermost.mattermost_get_current_user`

Read read

Get the profile of the currently authenticated Mattermost user. Returns username, email, display name, roles, and locale.

Parameters: none

Generic CLI call

kosmo integrations:call mattermost.mattermost_get_current_user '{}' --json

Provider shortcut

kosmo integrations:mattermost mattermost_get_current_user '{}' --json

Function Schemas

Use these parameter tables when building CLI payloads without calling integrations:schema first.

`mattermost.mattermost_list_channels`

List channels the current user belongs to in Mattermost. Returns channel IDs, names, types, and team associations. Use this to discover available channels before posting messages or reading posts.

Operation: Read read
Schema command: kosmo integrations:schema mattermost.mattermost_list_channels --json

Parameter	Type	Required	Description
`page`	integer	no	Page number (0-indexed). Default: 0.
`per_page`	integer	no	Number of channels per page. Default: 60.

`mattermost.mattermost_get_channel`

Get details of a specific Mattermost channel by ID. Returns channel name, display name, type, header, purpose, and member counts.

Operation: Read read
Schema command: kosmo integrations:schema mattermost.mattermost_get_channel --json

Parameter	Type	Required	Description
`channel_id`	string	yes	The channel ID.

`mattermost.mattermost_create_post`

Post a message to a Mattermost channel. Provide the channel_id and the message text. Returns the created post with its ID and timestamp.

Operation: Write write
Schema command: kosmo integrations:schema mattermost.mattermost_create_post --json

Parameter	Type	Required	Description
`channel_id`	string	yes	The channel ID to post the message in.
`message`	string	yes	The message text to post. Supports Markdown formatting.

`mattermost.mattermost_list_posts`

List posts in a Mattermost channel. Returns post IDs, messages, author info, and timestamps. Use page and per_page for pagination.

Operation: Read read
Schema command: kosmo integrations:schema mattermost.mattermost_list_posts --json

Parameter	Type	Required	Description
`channel_id`	string	yes	The channel ID to list posts from.
`page`	integer	no	Page number (0-indexed). Default: 0.
`per_page`	integer	no	Number of posts per page. Default: 60.

`mattermost.mattermost_get_post`

Get a specific Mattermost post by ID. Returns the full post including message content, author, channel, and timestamps.

Operation: Read read
Schema command: kosmo integrations:schema mattermost.mattermost_get_post --json

Parameter	Type	Required	Description
`post_id`	string	yes	The post ID.

`mattermost.mattermost_list_teams`

List teams the current user belongs to in Mattermost. Returns team IDs, names, display names, and types. Use this to discover available teams before working with channels.

Operation: Read read
Schema command: kosmo integrations:schema mattermost.mattermost_list_teams --json

Parameter	Type	Required	Description
`page`	integer	no	Page number (0-indexed). Default: 0.
`per_page`	integer	no	Number of teams per page. Default: 60.

`mattermost.mattermost_get_current_user`

Get the profile of the currently authenticated Mattermost user. Returns username, email, display name, roles, and locale.

Operation: Read read
Schema command: kosmo integrations:schema mattermost.mattermost_get_current_user --json

Parameter	Type	Required	Description
No parameters.

Permissions

Headless calls still follow the integration read/write permission policy. Configure read/write defaults with integrations:configure. Add --force only for trusted automation that should bypass that policy.