Letterly other

Other MCP Clients

Connect Letterly to any MCP-compatible client using the endpoint, authentication details, and tools reference below.

What is this?

Letterly is an AI voice note-taker for iOS, Android, Mac, Web, and Apple Watch. You speak — Letterly turns it into clean, structured text using custom rewrite options.

With Letterly MCP, your notes and rewrite prompts become available inside your AI assistant. Search through notes, rewrite them in different styles, translate to other languages, or create new notes — all without leaving your conversation.

MCP Endpoint

https://mcp.letterly.app/mcp

What you can do

Find and read your notes

Ask your AI assistant to pull up notes by topic, keyword, or date. No more switching between apps to find that idea you recorded last week.

Find my notes about the landing page

Capture ideas on the fly

Dictate a new note straight from your AI conversation. The thought stays in Letterly, synced across all your devices.

Save this idea: minimalist landing page focused on loading speed and conversion

Rewrite notes into polished text

Use your custom rewrite options to turn raw voice notes into structured lists, emails, blog posts, or whatever format you need.

Rewrite my last note as a structured list

Translate notes instantly

Working in multiple languages? Translate any note without leaving the conversation.

Translate note #42 to English

Build custom rewrite options

Create and manage rewrite prompts that define how your notes get transformed — extract action items, format as emails, summarize for stakeholders.

Create a rewrite option for extracting action items from meeting notes

Tools

Letterly MCP exposes 12 tools grouped into three categories.

Notes

Tool Type Description
list_notes read-only List your notes with filtering by date and pagination
get_note read-only Get the full content of a specific note
search_notes read-only Search across all notes by keyword or topic
create_note write Create a new note
delete_note destructive Permanently delete a note
rewrite_note write Rewrite a note using a selected rewrite option
translate_note write Translate a note to another language

Rewrite Prompts

Tool Type Description
list_prompts read-only List available rewrite options
create_prompt write Create a new rewrite option
update_prompt write Update an existing rewrite option
delete_prompt destructive Delete a rewrite option

Account

Tool Type Description
get_user_info read-only Get current user information

All tools include proper safety annotations (readOnlyHint / destructiveHint) as required by the MCP specification.

Authentication

Letterly MCP uses OAuth 2.1 Authorization Code + PKCE (S256) — the most secure flow recommended for MCP servers.

  • Dynamic Client Registration supported (RFC 7591)
  • Access tokens: RS256 JWT, 15 min TTL
  • Refresh tokens: 30 day TTL with rotation
  • Login methods: Email magic link, Google, Apple

Scopes

Scope Grants access to
notes:read list_notes, get_note, search_notes
notes:write create_note
notes:delete delete_note
notes:rewrite rewrite_note, translate_note
rewrite:read list_prompts
rewrite:write create_prompt, update_prompt
rewrite:delete delete_prompt
user:read get_user_info

Setup

Claude Desktop & claude.ai

  1. Open Claude and go to Settings → Connectors
  2. Click Add custom connector
  3. Enter the MCP endpoint: https://mcp.letterly.app/mcp
  4. Complete the OAuth login with your Letterly account
  5. Start asking Claude about your notes

Claude Code

claude mcp add letterly https://mcp.letterly.app/mcp

Other MCP clients

Use the endpoint URL https://mcp.letterly.app/mcp with any MCP-compatible client. The server supports Streamable HTTP transport.

Try it

Once connected, try these prompts to get started:

  1. Show me my recent notes” — lists your latest voice notes
  2. Find my notes about the landing page” — searches by topic
  3. Rewrite my last note as a structured list” — applies a rewrite option
  4. Translate note #42 to English” — translates a note
  5. Create a rewrite option for extracting action items from meeting notes” — builds a custom prompt

Privacy & Support

Your data stays yours. Letterly MCP connects to your personal account — the AI assistant can only access notes and prompts that belong to you, within the scopes you authorize.