OAI2LMApi - OpenAI to Language Model API Bridge

A VSCode extension that connects OpenAI-compatible APIs to VSCode's Language Model API, enabling integration with GitHub Copilot Chat and other AI-powered features in VSCode.

Features

✅ Full OpenAI API Compatibility: Works with any OpenAI-compatible API endpoint
✅ VSCode Language Model API Integration: Seamlessly integrates with VSCode's built-in language model features
✅ Streaming Support: Real-time streaming responses for better user experience
✅ Automatic Model Loading: Fetches available models from the API endpoint on startup
✅ Secure API Key Storage: API keys are stored securely using VSCode's SecretStorage
✅ Tool Calling Filter: Optionally filter models by tool/function calling support
✅ Easy Configuration: Simple setup through VSCode settings and commands

Requirements

VSCode version 1.107.0 or higher
An OpenAI-compatible API endpoint
API key for authentication

Installation

From VSIX

Download the .vsix file from the Releases page
In VSCode, open the Command Palette (Ctrl+Shift+P / Cmd+Shift+P)
Run "Extensions: Install from VSIX..." and select the downloaded file

From Source

Clone this repository
Run pnpm install to install dependencies
Run pnpm run compile to build the extension
Press F5 in VSCode to run the extension in debug mode

Quick Start

Install the extension
Open Command Palette (Ctrl+Shift+P / Cmd+Shift+P)
Run OAI2LMApi: Set API Key and enter your API key
(Optional) Configure the API endpoint in settings if not using OpenAI
Models will be automatically loaded and available in GitHub Copilot Chat

Commands

Command	Description
`OAI2LMApi: Set API Key`	Securely store your API key
`OAI2LMApi: Clear API Key`	Remove the stored API key
`OAI2LMApi: Refresh Models`	Manually reload available models from the API
`OAI2LMApi: Manage Provider Settings`	Open extension settings

Configuration

Configure the extension through VSCode settings (Ctrl+, or Cmd+,):

Setting	Default	Description
`oai2lmapi.apiEndpoint`	`https://api.openai.com/v1`	OpenAI-compatible API endpoint URL
`oai2lmapi.autoLoadModels`	`true`	Automatically load models from API on startup
`oai2lmapi.showModelsWithoutToolCalling`	`false`	Show models that do not support tool/function calling

Example Configuration

{
  "oai2lmapi.apiEndpoint": "https://api.openai.com/v1",
  "oai2lmapi.autoLoadModels": true,
  "oai2lmapi.showModelsWithoutToolCalling": false
}

API Key Storage

The API key is stored securely using VSCode's built-in SecretStorage. Use the OAI2LMApi: Set API Key command to set your key.

Note: If you previously stored an API key in settings (the deprecated oai2lmapi.apiKey setting), it will be automatically migrated to secure storage.

Supported APIs

This extension works with any API that implements the OpenAI chat completions format:

OpenAI API
Azure OpenAI
LocalAI
Ollama (with OpenAI compatibility layer)
LM Studio
Text Generation WebUI (with OpenAI extension)
Any custom OpenAI-compatible implementation

Troubleshooting

Extension doesn't activate

Ensure you're using VSCode 1.107.0 or higher
Verify the extension is enabled in the Extensions view

Models not loading

Run OAI2LMApi: Set API Key to ensure your API key is configured
Verify your API endpoint is correct and accessible
Check the VSCode Developer Console (Help > Toggle Developer Tools) for errors
Try OAI2LMApi: Refresh Models to manually reload

API errors

Ensure your API endpoint supports /v1/models and /v1/chat/completions
Verify network connectivity to the API endpoint

License

MIT - See LICENSE for details.

Contributing

Contributions are welcome! Please feel free to submit issues or pull requests on GitHub.