Letterbox
Rank #23,624io.github.dovahkiin-v/letterbox
File-based comms protocol for AI-to-AI dialogue between terminal agents.
Letterbox is a Model Context Protocol (MCP) server published by dovahkiin-v. It ranks #23,624 of 132,113 servers tracked on MCP Toplist. Letterbox is listed across 2 registries — Official MCP and Glama, with 1 tracked version. It was first listed on Jul 2, 2026 and most recently updated on Aug 24, 2026.
Ranks ahead of 108,489 of 132,113 servers on MCP Toplist.
Use Letterbox
Requires user-supplied configuration before first use — typically an API key, token or connection string set via environment variables.
claude mcp add letterbox -e "LETTERBOX_CHANNEL=<your LETTERBOX_CHANNEL>" -e "LETTERBOX_SENDER=<your LETTERBOX_SENDER>" -e "LETTERBOX_INSTANCE_ID=<your LETTERBOX_INSTANCE_ID>" -- uvx letterboxReplace each placeholder with your own value before saving.
[mcp_servers.letterbox]
command = "uvx"
args = ["letterbox"]
[mcp_servers.letterbox.env]
LETTERBOX_CHANNEL = "<your LETTERBOX_CHANNEL>"
LETTERBOX_SENDER = "<your LETTERBOX_SENDER>"
LETTERBOX_INSTANCE_ID = "<your LETTERBOX_INSTANCE_ID>"Add to ~/.codex/config.toml. Replace each placeholder with your own value before saving.
{
"mcpServers": {
"letterbox": {
"command": "uvx",
"args": [
"letterbox"
],
"env": {
"LETTERBOX_CHANNEL": "<your LETTERBOX_CHANNEL>",
"LETTERBOX_SENDER": "<your LETTERBOX_SENDER>",
"LETTERBOX_INSTANCE_ID": "<your LETTERBOX_INSTANCE_ID>"
}
}
}
}Add to claude_desktop_config.json (Settings → Developer → Edit Config). Replace each placeholder with your own value before saving.
{
"mcpServers": {
"letterbox": {
"command": "uvx",
"args": [
"letterbox"
],
"env": {
"LETTERBOX_CHANNEL": "<your LETTERBOX_CHANNEL>",
"LETTERBOX_SENDER": "<your LETTERBOX_SENDER>",
"LETTERBOX_INSTANCE_ID": "<your LETTERBOX_INSTANCE_ID>"
}
}
}
}Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (per project). Replace each placeholder with your own value before saving.
{
"servers": {
"letterbox": {
"type": "stdio",
"command": "uvx",
"args": [
"letterbox"
],
"env": {
"LETTERBOX_CHANNEL": "<your LETTERBOX_CHANNEL>",
"LETTERBOX_SENDER": "<your LETTERBOX_SENDER>",
"LETTERBOX_INSTANCE_ID": "<your LETTERBOX_INSTANCE_ID>"
}
}
}
}Save as .vscode/mcp.json in your workspace. Replace each placeholder with your own value before saving.
{
"mcpServers": {
"letterbox": {
"command": "uvx",
"args": [
"letterbox"
],
"env": {
"LETTERBOX_CHANNEL": "<your LETTERBOX_CHANNEL>",
"LETTERBOX_SENDER": "<your LETTERBOX_SENDER>",
"LETTERBOX_INSTANCE_ID": "<your LETTERBOX_INSTANCE_ID>"
}
}
}
}Add to ~/.codeium/windsurf/mcp_config.json. Replace each placeholder with your own value before saving.
{
"mcpServers": {
"letterbox": {
"command": "uvx",
"args": [
"letterbox"
],
"env": {
"LETTERBOX_CHANNEL": "<your LETTERBOX_CHANNEL>",
"LETTERBOX_SENDER": "<your LETTERBOX_SENDER>",
"LETTERBOX_INSTANCE_ID": "<your LETTERBOX_INSTANCE_ID>"
}
}
}
}Replace each placeholder with your own value before saving.
Show your rank
Maintain this server? Add the live rank badge to your README — it updates automatically as the leaderboard changes.
[](https://mcptoplist.com/server/io.github.dovahkiin-v%2Fletterbox)<a href="https://mcptoplist.com/server/io.github.dovahkiin-v%2Fletterbox"><img src="https://mcptoplist.com/badge/io.github.dovahkiin-v%2Fletterbox.svg" alt="MCP Toplist: Top 25% of 132,113" /></a>Variants: append ?metric=score or ?metric=stars to the image URL.
Listed on 2 registries
dovahkiin-v
Other servers by dovahkiin-v
View all dovahkiin-v servers →Available versions (1)
| Version | Published |
|---|---|
| 1.2.2 | Aug 24, 2026 |
Frequently asked questions
- Who maintains Letterbox?
- Letterbox is maintained by dovahkiin-v, which publishes 2 MCP servers (4 total versions) tracked on MCP Toplist.
- Is Letterbox listed on the Official MCP Registry?
- Yes — Letterbox is listed on the Official MCP Registry, alongside Glama.
- How many versions does Letterbox have?
- MCP Toplist tracks 1 version of Letterbox, most recently published on Aug 24, 2026.
- Where can I find the source code for Letterbox?
- The source code for Letterbox is hosted at github.com/dovahkiin-v/letterbox.
Do you run this server?
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