{"name":"io.github.dovahkiin-v/letterbox","slug":"dovahkiin-v-letterbox","title":"Letterbox","description":"File-based comms protocol for AI-to-AI dialogue between terminal agents.","url":"https://mcp.market/server/dovahkiin-v-letterbox","rating":null,"grade":"U","score":null,"certified":false,"status":"active","category":"other","tags":[],"presence":{"score":0,"stars":null,"forks":null,"downloads_week":null,"last_push_at":null,"license":null},"uptime":null,"claimed":false,"transport":"pypi","callable_via_gateway":false,"default_price_micros":0,"repository":"https://github.com/dovahkiin-v/letterbox","website":null,"version":"1.2.2","remotes":[],"packages":[{"registryType":"pypi","identifier":"letterbox","version":"1.2.2","transport":{"type":"stdio"},"environmentVariables":[{"description":"Channel name to open. Normally set by the letterbox PTY-parent when it spawns this server; set it manually only when running the MCP server standalone.","isRequired":true,"format":"string","name":"LETTERBOX_CHANNEL"},{"description":"This endpoint's identity on the channel — the name the peer agent sees on every message.","isRequired":true,"format":"string","name":"LETTERBOX_SENDER"},{"description":"Per-launch instance id, the watcher/own-write join key that stops an agent seeing its own messages as incoming. Must be unique per launch.","isRequired":true,"format":"string","name":"LETTERBOX_INSTANCE_ID"}]}],"tools":[],"scan":null,"grade_history":[],"reviews":[]}