Can VS Code & GitHub Copilot use Mattermost?

Local Mattermost servers

How to add Mattermost to VS Code & GitHub Copilot

1. Open the Command Palette and run MCP: Add Server. Choose HTTP for a server URL or Command (stdio) for a local install command.
2. Or edit .vscode/mcp.json in your workspace: VS Code’s format puts servers under a top-level "servers" object (remote: "type": "http" + "url"; local: "type": "stdio" + "command"). Portable Copilot files (.mcp.json, ~/.copilot/mcp-config.json) use "mcpServers" instead, so don’t copy between them unchecked.
3. Sign in if the server asks, then use its tools in Copilot agent chat.

Menus change, so check the VS Code MCP configuration reference. Every server page has a copy-paste config for VS Code & GitHub Copilot.

Is it safe to connect Mattermost to VS Code & GitHub Copilot?

Check the publisher and trust grade first. Mattermost doesn't run an official MCP server we can verify, so every server here comes from a third party and can see whatever your account can.

Can ChatGPT or Claude connect to Mattermost?

See https://canmyaiuse.pages.dev/can/chatgpt/mattermost/ and https://canmyaiuse.pages.dev/can/claude/mattermost/

Does Mattermost have an official MCP server?

Not that we can verify: it isn't in the official MCP Registry as of 2026-10-27, and we haven't found a server hosted by Mattermost itself. Full list: https://canmyaiuse.pages.dev/apps/mattermost/