MAI LLM Proxy Extension

Universal LLM proxy for VS Code, supporting GitHub Copilot and Azure Papyrus backends.

Enables Claude Code, Codex CLI, and other AI tools to use enterprise LLM services through a local HTTP proxy that handles authentication and API format translation (Anthropic ↔ OpenAI) transparently.

Features

GitHub Copilot backend — Direct API calls with OAuth device flow authentication
Azure Papyrus backend — Enterprise LLM access via Azure Identity
Format translation — Accepts both Anthropic and OpenAI request formats
Streaming support — Full SSE streaming with tool call argument accumulation
Image processing — Auto-resize, EXIF stripping, adaptive compression
Model routing — Friendly aliases (opus, sonnet, haiku) map to Copilot API models

Commands

Command	Description
`MAI-LLMProxy: Start Server`	Start the proxy on the configured port
`MAI-LLMProxy: Stop Server`	Stop the running proxy
`MAI-LLMProxy: Configure Claude Code Settings`	Write proxy URL to `~/.claude/settings.json`
`MAI-LLMProxy: Configure Codex Settings`	Write proxy config to `~/.codex/config.toml`
`MAI-LLMProxy: Reset GitHub Copilot Authentication`	Clear auth tokens and re-authenticate
`MAI-LLMProxy: Check GitHub Copilot Auth Status`	Show token expiration time
`MAI-LLMProxy: Kill Process on Configured Port`	Free the port if blocked

Settings

Setting	Default	Description
`mai-llmproxy.provider`	`copilot`	LLM provider: `copilot` or `papyrus`
`mai-llmproxy.serverPort`	`5000`	Port for the proxy server
`mai-llmproxy.claudeAutocompactPct`	`60`	Context autocompact threshold

Documentation

Microsoft Internal Documentation

MicrosoftAI LLM Proxy

MAI-EngineeringSystems

MAI LLM Proxy Extension

Features

Commands

Settings

Documentation