Letterly — Claude Code MCP server: what it does, how to install
Connects your Letterly voice notes to an AI chat. Search recordings, update text, translate drafts, or adjust writing tone directly in your editor.
claude mcp add --transport http mcp https://mcp.letterly.app/mcpWhat Letterly does
This MCP integration runs as a remote service at https://mcp.letterly.app/mcp. You do not need to download packages or run a local daemon. Everything communicates over streamable HTTP.
The server lets your model interact with recorded voice notes. An assistant can browse previous entries, create new drafts, or manage custom rewrite templates.
A Letterly account is mandatory. The very first request will trigger an OAuth login flow in your browser.
What it helps with
- search voice recordings by topic or date
- turn spoken drafts into concise emails or summaries
- translate recorded notes into other languages
- configure custom rewrite prompts inside Letterly
Example prompts for the agent
- Pull up my voice notes about sprint planning from last Tuesday.
- Rewrite my latest recording into a concise email update.
- Translate the note about the road trip into Spanish.
How to install Letterly
Platform CLI: remote server
claude mcp add --transport http mcp https://mcp.letterly.app/mcpPlatform CLI: remote server
codex mcp add letterly --url https://mcp.letterly.app/mcpConfig file
{
"mcpServers": {
"letterly": {
"url": "https://mcp.letterly.app/mcp"
}
}
}Config file
{
"servers": {
"letterly": {
"type": "http",
"url": "https://mcp.letterly.app/mcp"
}
}
}Platform CLI: remote server
gemini mcp add -t http letterly https://mcp.letterly.app/mcpStep by step, with commands for each platform: How to add an MCP server to Claude Code, Codex, Cursor, VS Code, Gemini CLI and more
Questions about Letterly
How to install Letterly in Claude Code?
Run this command in your terminal: claude mcp add --transport http letterly https://mcp.letterly.app/mcp. During the first connection, complete the OAuth login prompt with your Letterly account.
What does the Letterly MCP server do?
It connects your Letterly voice memos to your AI assistant. The model can search saved notes, draft new ones, translate entries, and apply custom rewriting styles.
Do I need to install or run code locally?
No local runtime or script is needed. The server is hosted at https://mcp.letterly.app/mcp and handles requests over streamable HTTP.
