io.github.dovahkiin-v/letterbox

Letterbox

Is the Letterbox MCP server down? No. It is up and needs args, probed 2026-10-30.

File-based comms protocol for AI-to-AI dialogue between terminal agents.

needs args probed 2026-11-14 · unchanged since 2026-10-30

MCP error -32000: Connection closed
usage: letterbox [-h] [--config PATH]
                 {claude,gemini,antigravity,agy,vibe,mcp,tail,list-channels,init,prune

Run it: uvx letterbox@1.2.2 (stdio, probed in a container with the network off)
Host: pypi.org
Repository: https://github.com/dovahkiin-v/letterbox
Registry: active, updated 2026-08-24 · registry entry

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The server needs command line arguments that the registry entry does not list. Add them to the package arguments in the registry entry.