LetX · Model Context Protocol

Connect an AI client to a LetX project.

The hosted MCP endpoint provides named tools for templates, projects, text files, and LaTeX compilation. OAuth 2.1 controls access.

Open the official MCP guide

Hosted endpoint

https://api.letx.app/mcp

Use the URL exactly as published. Authentication opens through OAuth; do not paste a LetX password or access token into a client.

Tool surface

Ten documented core tools.

LetX also documents conventional search and fetch compatibility for ChatGPT deep research. The list below is the public core-tool table checked on August 29, 2026.

search_templates

Search LetX’s published template catalogue.

get_template

Read the details and preview information for one template.

list_projects

List projects available to the connected account.

list_project_files

Inspect a project’s file tree.

read_project_file

Read a text file from a project.

create_project_from_template

Create a project from a published template slug.

create_project

Create a new LetX project.

update_project_file

Create or replace a project text file.

compile_latex

Compile supplied LaTeX without first creating a stored project.

compile_project

Compile an existing project and return the result.

Connect

Add the hosted endpoint to Claude, ChatGPT, Claude Code, or another compatible OAuth client.

Authorize

Work

Ask the client to find a template, create a project, edit files, or compile. Open the resulting project in LetX for visual review and collaboration.

Security

Access controls.

OAuth 2.1

The external client does not receive the user’s LetX password.

Disclosed scopes

The consent step shows whether the client is requesting read or write access.

Revocation

The user can revoke a connection.

Project history

Prior file versions remain available according to the account’s history plan.

Text files

The documented tools edit project text files. Images and figures are uploaded through the editor.

Questions

Questions and answers.

What is the LetX MCP endpoint?

The hosted endpoint is https://api.letx.app/mcp. Compatible clients connect through OAuth 2.1.

Which clients does LetX test?

The published setup guide documents Claude, ChatGPT, and Claude Code.

Does an MCP client receive my LetX password?

No. OAuth authorization grants disclosed scopes without exposing the user’s password to the client.

Is the connection free?

LetX says connecting is free. Tool use follows the connected account’s quota and plan limits.

Primary sources

Official LetX MCP guide LetX pricing and plan limits LetX privacy policy

Product behavior and plan details were checked August 29, 2026. Verify the official LetX pages before making a purchase or security decision.