mssgs opens its chat to AI assistants through a local MCP server

Brummen, the Netherlands, 29 June 2026

mssgs, the independent Dutch group chat application, has added a local Model Context Protocol (MCP) server to its desktop application. AI assistants that support the protocol, including Claude and Cursor, can read and act in a member’s conversations without mssgs sending those conversations anywhere.

The integration is available in the desktop application for macOS, Windows and Linux from version 13.3.2, released on 29 June 2026, and is listed under Integrations in Settings.

The server runs on the member’s own computer

The MCP server is part of the desktop application rather than a hosted service. An assistant connects to it over the local machine, which means the account that the assistant acts as is the member’s own, already signed in, and no additional credential is issued to a third party.

Nothing is exposed by default. A member selects the channels and conversations an assistant may see, and the server reaches those and nothing else. Channels that have not been selected are not visible to the integration at all.

Every capability is enabled separately

Reading and writing are not a single switch. Sending messages, managing a community, handling direct-message requests, viewing profiles and stories, taking part in voice channels and reviewing the moderation queue are each a separate toggle in Settings, and the tools an assistant can see change as those toggles change.

Capabilities added since the first release include:

• Real-time delivery of new messages and presence, without polling.
• Rich embed cards with action buttons, and the button presses, reactions and replies they produce.
• File attachments by local path or inline data, not only already-hosted links.
• Voice channels and direct-message calls, including answering and declining.
• Community management: permission groups, invites, channels and categories.
• Search across a member’s messages, and the community moderation queue.

Built for bots as well as assistants

The same interface serves bot accounts. A bot posts embed cards with action buttons and receives the resulting events, so a long-running task can show progress and then be updated in place rather than posting a second message.

Alongside MCP, mssgs offers incoming webhooks, slash-command triggers that call a webhook, and a REST API. Documentation for all of them is published at mss.gs/en/docs.

An assistant that can read your team’s chat is a serious amount of access, and we did not want to grant it by uploading anything. Running the server on the member’s own machine, over channels they picked themselves, with a separate switch for every action, keeps the decision where it belongs.

René van Sweeden, founder of mssgs

Availability

The MCP integration is included in mssgs at no cost and is configured under Integrations in the desktop application’s settings. Setup instructions for each supported assistant are published at mss.gs/en/docs/mcp.

mssgs is free to use, carries no advertising, and hosts all data in the European Union. Downloads for every platform are available at mss.gs/en/downloads.