letX connector
Use letX inside Claude
Give Claude real LaTeX hands: compile to PDF, browse templates, and edit your letX projects from claude.ai.
Available on Claude Pro, Max, and Team plans (custom connectors).
- 1
Open connector settings
On claude.ai go to Settings → Connectors and click Add custom connector.
- 2
Add letX
Enter the server URL:
https://api.letx.app/mcpand save. - 3
Sign in to letX
Claude opens letx.app in your browser. Sign in (or create a free account) and click Allow access.
- 4
Use it
Ask Claude to “compile this LaTeX”, “start my thesis from a university template”, or “read main.tex in my paper project and fix the references”.
What Claude 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
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.
Which permissions does Claude get?
Only what you approve: template browsing, project read/write, and compiling. Every file edit keeps the previous version in letX’s history, and you can disconnect anytime from Settings → Connected Accounts.
Does this replace the letX editor?
No. It complements it. Claude is great for drafting and fixing; the letX editor adds live PDF preview, real-time collaboration, and SyncTeX navigation. Every project Claude touches links straight into the editor.