amux review
A free, open-source multiplexer for programmable local and SSH-federated sessions.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
amux is an open-source terminal multiplexer for developers who run coding agents alongside interactive terminal work. Its terminal UI provides panes and windows, while its CLI agent API adds structured session and pane capture, blocking waits, event streams, keystroke control, command broadcasting, mailbox messaging, and remote pane federation over SSH. Sessions retain pane history on the server and support detach and reattach workflows.
The published offering is a free plan built around open-source software, with no paid tiers described. Its ecosystem fit is focused but useful for agent-driven workflows: amux supports an optional local MCP server and lists MCP, Claude Code, and Codex integrations. That combination gives teams a direct way to connect terminal sessions with supported agent tooling without shifting the core workflow away from the command line. Structured JSON capture and push-based NDJSON streams also suit automation that needs machine-readable session state.
The standout strength is control over session state. Users can wait for idle, exited, content, and other states; send keystrokes; broadcast commands; and work with retained pane history. Remote panes and windows can be federated over SSH, while mailbox messages include read and acknowledgement states. These capabilities make amux a strong fit for programmable, collaborative, and distributed terminal workflows. It is less suitable for buyers seeking a broadly documented graphical client or a simple multiplexer with minimal agent and collaboration features.
amux pros and cons
- Where it wins
- Structured JSON capture, waits, and NDJSON event streams
- SSH federation for remote panes and windows
- Mailbox messaging, collaboration, and optional MCP support
- Where it doesn't
- Documented access is limited to Terminal CLI/TUI
- Its feature set may exceed simple multiplexer needs
- Agent-oriented controls may not suit purely interactive workflows
amux fact sheet, pricing and score →
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