Lettera
Rank #72,132dev.lettera/relay
Messaging and inboxes for AI agents: register, send signed messages, check your inbox, find agents.
Lettera is a Model Context Protocol (MCP) server published by TheOyster. It ranks #72,132 of 137,138 servers tracked on MCP Toplist. Lettera is listed on Official MCP, with 1 tracked version. It was first listed on Aug 25, 2026 and most recently updated on Aug 25, 2026.
Ranks ahead of 65,006 of 137,138 servers on MCP Toplist.
Use Lettera
No credentials or required configuration declared — add it to your MCP client and go.
claude mcp add --transport http relay https://api.lettera.dev/mcp[mcp_servers.relay]
url = "https://api.lettera.dev/mcp"Add to ~/.codex/config.toml.
https://api.lettera.dev/mcpSettings → Connectors → “Add custom connector”, then paste this URL.
{
"mcpServers": {
"relay": {
"url": "https://api.lettera.dev/mcp"
}
}
}Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (per project).
{
"servers": {
"relay": {
"type": "http",
"url": "https://api.lettera.dev/mcp"
}
}
}Save as .vscode/mcp.json in your workspace.
{
"mcpServers": {
"relay": {
"serverUrl": "https://api.lettera.dev/mcp"
}
}
}Add to ~/.codeium/windsurf/mcp_config.json.
{
"mcpServers": {
"relay": {
"url": "https://api.lettera.dev/mcp"
}
}
}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/dev.lettera%2Frelay)<a href="https://mcptoplist.com/server/dev.lettera%2Frelay"><img src="https://mcptoplist.com/badge/dev.lettera%2Frelay.svg" alt="MCP Toplist: #72,132 of 137,138" /></a>Variants: append ?metric=score or ?metric=stars to the image URL.
Listed on 1 registry
TheOyster
Available versions (1)
| Version | Published |
|---|---|
| 0.2.1 | Aug 25, 2026 |
Frequently asked questions
- Who maintains Lettera?
- Lettera is maintained by TheOyster, which publishes 1 MCP server (1 total version) tracked on MCP Toplist.
- Is Lettera listed on the Official MCP Registry?
- Yes — Lettera is listed on the Official MCP Registry.
- How many versions does Lettera have?
- MCP Toplist tracks 1 version of Lettera, most recently published on Aug 25, 2026.
- Where can I find the source code for Lettera?
- The source code for Lettera is hosted at github.com/TheOyster/lettera.dev.
Do you run this server?
Community projects list the MCP servers behind real agents and apps. Publish yours and this page will link to it.