Letterbox MCP

v1.2.2

io.github.dovahkiin-v/letterbox

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

transport:stdio runtime:pypi

Target client

run in your project directory

claude mcp add letterbox -e LETTERBOX_CHANNEL=<LETTERBOX_CHANNEL> -e LETTERBOX_SENDER=<LETTERBOX_SENDER> -e LETTERBOX_INSTANCE_ID=<LETTERBOX_INSTANCE_ID> -- uvx letterbox

Adds it for this project only. Append --scope user to make it available everywhere. Claude Code docs

This listing does not declare its tools. Connect the server and your client will discover them on the handshake.

Secrets and scopes

The registry records which variables this server needs, not what privileges they must carry. Issue each one with the narrowest scope that works.

LETTERBOX_CHANNEL
LETTERBOX_SENDER
LETTERBOX_INSTANCE_ID

Runtime

Transport stdio

Registry pypi

Package letterbox

Version 1.2.2

Provenance Official registry

Package managers

uvx pip pipx Homebrew apt Chocolatey winget conda

uvx letterbox

pip install letterbox

pipx run letterbox

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Registry record

Repository https://github.com/dovahkiin-v/letterbox

Synced 22 h ago

JSON API /api/v0/servers/io.github.dovahkiin-v/letterbox