Letterly + Cursor

Why use it

You recorded a voice note about the feature spec. You had a call about the API changes. Instead of searching through apps, just ask Cursor to pull those notes in as context.

Letterly MCP connects to Cursor’s built-in MCP support, giving the AI access to your full library of voice notes — searchable, rewritable, and ready to use as context.

Setup

Option 1: Cursor Settings UI

1. Open Cursor and go to Settings (Cmd+, / Ctrl+,)
2. Navigate to MCP in the sidebar
3. Click Add new MCP server
4. Fill in the fields:
   • Name: letterly
   • Type: streamable-http
   • URL: https://mcp.letterly.app/mcp
5. Click Save
6. Click the refresh icon next to the server to connect, and sign in to Letterly when prompted

Option 2: Project config file

Create or edit .cursor/mcp.json in your project root:

{
  "mcpServers": {
    "letterly": {
      "url": "https://mcp.letterly.app/mcp"
    }
  }
}

Restart Cursor after adding the config. The OAuth sign-in will appear on first use.

Using Letterly in Cursor

Once connected, Letterly tools are available in Cursor’s Agent and Composer modes. The AI can call them automatically when your prompt involves notes.

In Agent mode

Open the AI pane (Cmd+L / Ctrl+L), switch to Agent mode, and type your request. Cursor will call Letterly tools as needed.

In Composer

Use Composer (Cmd+I / Ctrl+I) for multi-file tasks. Ask it to pull in your notes as context before generating code.

Try these prompts

Spec-driven development

Find my notes about the checkout flow redesign and implement the changes described there

Meeting follow-up

Search my notes for the backend meeting from yesterday and create tickets based on the action items

Quick context

What did I record about the authentication approach?

Capture while coding

Save a note: found a race condition in the payment webhook handler, need to add idempotency key check

Documentation from notes

Find all my notes about the onboarding flow and generate API documentation from them

Tips

• Use Agent mode. Cursor’s Agent mode works best with MCP tools — it can decide when to search your notes automatically.
• Project-level config. Put .cursor/mcp.json in your repo so the whole team gets the connection.
• Combine with codebase context. Ask Cursor to find your notes about a feature and use them alongside the existing code to generate improvements.

Learn more

• Full technical reference — endpoint, tools, auth, scopes
• All MCP guides