Letterbox
Rank #82,903io.github.dovahkiin-v/letterbox
File-based comms protocol for AI-to-AI dialogue between terminal agents.
What you can do with Letterbox
Letterbox is a Model Context Protocol (MCP) server published by dovahkiin-v. It ranks #82,903 of 168,415 active servers 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.
Not verifiedMCP Toplist has not yet written a checked profile for this server, so the paragraph above is assembled from registry data only. The repository README is the authority on what it does.
What Letterbox can and cannot do
Not verifiedMCP Toplist has not catalogued this server's tools or limitations. The repository README lists them.
What you need before using Letterbox
The registry listing declares required configuration before first use — typically an API key, token or connection string set via environment variables.
Declared by Glama, last synced Nov 4, 2026. Not independently verified by MCP Toplist.
- LETTERBOX_CHANNEL · required
- LETTERBOX_SENDER · required
- LETTERBOX_INSTANCE_ID · required
Connect Letterbox and confirm it works
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.
After adding the config, ask your client to list this server's tools. A tool list confirms the connection; an empty list or an error means the server did not start or needs credentials.
When to choose another server
No task-specific alternatives are catalogued for Letterboxyet; the list above is its publisher's other servers.
What changed, and when this was checked
- First listed
- Jul 2, 2026
- Latest version published
- Aug 24, 2026
- Version history
- 1 version tracked (below)
- Requirements evidence
- Declared by Glama, last synced Nov 4, 2026. Not independently verified by MCP Toplist.
- Profile checked
- Not yet — purpose, capabilities and requirements above come from registry data only
- Ranking data as of
- Nov 4, 2026
- Official MCP ↗listed since Aug 25, 2026 · still listed
- Glama ↗listed since Aug 25, 2026 · still listed
Do you maintain Letterbox? to correct or enrich this profile.
Available versions (1)
| Version | Published |
|---|---|
| 1.2.2 | Aug 24, 2026 |
Ranks ahead of 85,512 of 168,415 servers on MCP Toplist.
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 50% of 168,415" /></a>Variants: append ?metric=score or ?metric=stars to the image URL.
Frequently asked questions
- Who maintains Letterbox?
- Letterbox is maintained by dovahkiin-v, which publishes 2 MCP servers (5 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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