Open-source team messaging via Mattermost — send messages, manage channels, list users, post to teams.
Use with AI AssistantsMCP
Connect Claude, Cursor, or any MCP-compatible client — then call tools directly
① Add This MCP Server
Paste into your AI client config — then all its tools are available instantly.
{
"mcpServers": {
"mattermost": {
"url": "https://mcp.aerostack.dev/s/aerostack/mcp-mattermost",
"headers": {
"Authorization": "Bearer YOUR_AEROSTACK_TOKEN"
}
}
}
}Replace YOUR_AEROSTACK_TOKEN with your API token from the dashboard.
② Call a Tool
Ask your AI assistant to call a specific tool, or send raw JSON-RPC:
Natural Language Prompt
“Use the _ping tool to verify mattermost credentials by calling a lightweight read endpoint. used internally by aerostack to validate credentials”
Using a Workspace?
Add this MCP to your Workspace — your team shares one token, secrets are stored securely, and every AI agent in the workspace can call it without per-user setup.
Open-source team messaging via Mattermost — send messages, manage channels, list users, post to teams.
Live endpoint: https://mcp.aerostack.dev/s/aerostack/mcp-mattermost
This MCP server gives AI agents access to Mattermost via 8 tools. Connect it to any Aerostack workspace and your agents can interact with Mattermost directly.
| Tool | Description |
|---|---|
get_me | Get the current user profile including id, username, email, and roles. |
list_teams | List all teams the current user is a member of. |
list_channels | List channels in a team that the current user is a member of. |
get_channel | Get channel details by channel ID. |
post_message | Post a message to a channel. |
list_posts | List recent posts in a channel. |
get_post | Get a specific post by post ID. |
create_channel | Create a new channel in a team. type: O=public, P=private. |
| Variable | Required | Description |
|---|---|---|
MATTERMOST_URL | Yes | See provider documentation |
MATTERMOST_TOKEN | Yes | Personal access token or service token from the provider |
Add the following secrets under Project → Secrets:
MATTERMOST_URLMATTERMOST_TOKENOnce added, every AI agent in your workspace can use Mattermost tools automatically.
curl -X POST https://mcp.aerostack.dev/s/aerostack/mcp-mattermost \
-H 'Content-Type: application/json' \
-H 'X-Mcp-Secret-MATTERMOST-URL: your-mattermost-url' \
-H 'X-Mcp-Secret-MATTERMOST-TOKEN: your-mattermost-token' \
-d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"get_me","arguments":{}}}'
MIT
Live Endpoint
https://mcp.aerostack.dev/s/aerostack/mcp-mattermost
Sub-50ms globally · Zero cold start
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Yes. The Mattermost MCP includes a create_channel tool that lets Claude create channels in your Mattermost account from a plain-English prompt. You can also update and delete channels — no Mattermost UI needed.
Yes. The Mattermost MCP includes tools to list and retrieve teams from your Mattermost account. Claude can filter, sort, and summarize teams based on your instructions.
Yes. The Mattermost MCP uses the open Model Context Protocol standard, so it works in Claude, Cursor, Windsurf, and any other MCP-compatible AI tool. All 8 Mattermost tools are available everywhere you connect it — install once on Aerostack.
Yes. Aerostack hosts the Mattermost MCP with encrypted credential storage and per-account authentication. Your Mattermost credentials are never shared with Claude's conversation — they're used server-side only.