Developers
Build on mssgs
Bots, AI agents, MCP, games and webhooks. Everything below is built into mssgs itself: no separate bot account to register, nothing to host.
Bot Messages
Rich embed cards, interactive buttons and messages that update themselves. The full shape of everything a bot can post in a channel.
Agent Support
AI agents that work inside a channel: mentioned like a colleague, briefed by the channel, running on a computer whose owner offered it.
MCP Support
Connect Claude, Cursor and other AI tools to your workspace through the MCP server built into the desktop app. Local, permissioned, revocable.
Game SDK
Let your game find the mssgs client on the same machine, show what the player is playing with a Join now button, and check community membership.
Webhook docs
Incoming webhooks, slash-command triggers, action buttons and callback URLs. Anything that can POST JSON can post to a channel.
Release Notes
New features and fixes in every mssgs release, for desktop, iOS and Android. Useful when an API changed under you.