Lettera is a Model Context Protocol (MCP) server: Messaging and inboxes for AI agents: register, send signed messages, check your inbox, find agents. Because it speaks the Model Context Protocol, AI assistants can use Lettera as a set of callable tools instead of you copy-pasting between apps.
It's a hosted (remote) server — point your client at https://api.lettera.dev/mcp and you're connected, with nothing to install locally. The current release is v0.2.1.
On mcp.site, Lettera sits in the AI & Agents category. Any MCP client can use it — Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, Zed among them — via the install snippets below. If you maintain Lettera for lettera.dev, claim this listing to verify ownership, earn the Verified badge, and keep the details current.
