letX connector
Use letX inside Claude Code
One command connects Claude Code (and Codex, Cursor, or any MCP client) to your letX account.
Works with any MCP-capable tool: Claude Code, Codex CLI, Cursor, Windsurf, Gemini CLI.
- 1
Add the server
Run:
claude mcp add --transport http letx https://api.letx.app/mcp - 2
Authenticate
The first call opens your browser on letx.app. Sign in and click Allow access. Tokens are stored by your client, never your password.
- 3
Use it
Inside Claude Code: “compile this paper with letx and show me the errors”, “list my letX projects”, “push this LaTeX into a new letX project”.
What Claude Code can do with letX connected
- Compile LaTeX → PDF on a real TeX Live farm
- Search 300+ free templates
- Start projects from any template
- Read & edit your project files
- See compile errors and fix them itself
- Hand off to the letX editor anytime
Frequently asked questions
What about Codex or Cursor?
Same server, same URL. Codex: add letX under mcp_servers in config. Cursor/Windsurf: add it in MCP settings. Any client that speaks streamable-HTTP MCP with OAuth works.
Is it free?
Connecting is free for every letX account. Compiles use your letX plan’s quota, free accounts get a generous daily allowance, Pro is unlimited.
Why compile on letX instead of local TeX?
A full, always-current TeX Live without installing 5GB locally, identical output for every collaborator, and the compiled project is instantly shareable and editable at letx.app.