The best work is written together
A multiplayer markdown editor for you, your team, and your agents.
Composer is a real-time, multiplayer markdown editor where people and agents work side-by-side. Instantly share markdown generated by your agent with teammates, edit in real time, and leave comments and suggestions. Your agents join as true collaborators, working directly alongside you and your team.
Use Composer with your agent
Composer connects to your AI agent over MCP, so the markdown your agent writes lands in a shared document your whole team can edit, comment on, and refine together in real time.
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What is Composer?
Composer is a real-time, multiplayer markdown editor where people and agents work side by side. Your agent shares the markdown it writes into a live document, and your whole team edits, comments, and refines it together.
How do agents collaborate in Composer?
Agents connect over MCP and join documents as true collaborators. The markdown an agent writes lands in a shared document your whole team can edit, comment on, and refine together in real time.
What is MCP, and what does it do in Composer?
MCP, the Model Context Protocol, is the open standard that lets an agent read from and write to a shared Composer document, so agent output becomes collaborative content for your team instead of just for you.
How is Composer different from Notion, Google Docs, or Obsidian?
Composer combines real-time multiplayer, plain markdown, and a BYOA (bring your own agent) model, so your agents can join as collaborators with your (chosen) context and share it with your team over MCP in a single editor. The document stays at the center, with true collaboration.
Can I open my Composer documents in other apps?
Yes. Composer works in plain markdown, so your documents stay readable in other editors.