LMU AI (Large Model Unified) is a stable, reliable relay for the Claude / GPT / Gemini APIs. A single API key lets you use Anthropic / OpenAI / Google models — plus leading Chinese models — inside Claude Code, Codex CLI, Cursor, VS Code, OpenCode, Cherry Studio and other AI coding tools.

Which tools does LMU AI support?

Claude Code (CLI / desktop / VS Code extension), Codex CLI (Mac / Windows / server) and Codex desktop, Cursor, Cherry Studio, OpenCode, Hermes Agent, IntelliJ IDEA Kilo Code, CC Switch and more.

Do I need one key per tool?

No. One LMU AI key works across every supported tool and both the Anthropic and OpenAI protocols.

LMU AI Docs

LMU AI API documentation — connect Claude Code, Codex CLI, Cursor, Cherry Studio and other AI coding tools with a single key.

Welcome to the LMU AI API documentation.

Getting started — sign up, choose a plan, create an API key
API protocols — Anthropic / OpenAI / Gemini native endpoints, so you never fill in the wrong base URL
Models — every available model ID, one-click copy
FAQ — common errors and fixes
Error codes — what 401 / 403 / 429 / 5xx mean, searchable by the exact error text