agent-inject

Copilot API Proxy

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[!WARNING] This is a reverse-engineered proxy of GitHub Copilot API. It is not supported by GitHub, and may break unexpectedly. Use at your own risk. In the current version, if not using opencode OAuth, the device ID and machine ID will be sent to GitHub Copilot. It is not recommended to use a large number of accounts on a single device; if necessary, it is advised to run them in Docker containers.

[!WARNING] GitHub Security Notice:
Excessive automated or scripted use of Copilot (including rapid or bulk requests, such as via automated tools) may trigger GitHub's abuse-detection systems.
You may receive a warning from GitHub Security, and further anomalous activity could result in temporary suspension of your Copilot access.

GitHub prohibits use of their servers for excessive automated bulk activity or any activity that places undue burden on their infrastructure.

Please review:

• GitHub Acceptable Use Policies
• GitHub Copilot Terms

Use this proxy responsibly to avoid account restrictions.

Important Notes

[!IMPORTANT] Before using, please be aware of the following:

1. Claude Code configuration: When using with Claude Code, please configure the model ID as claude-opus-4-6 or claude-opus-4.6 (without the [1m] suffix, exceeding GitHub Copilot's context window limit too much may lead to being banned). Example claude settings.json see Manual Configuration with settings.json.

2. Recommend for Opencode: When using with opencode, we recommend starting with the opencode OAuth app. This approach behaves identically to opencode's built-in GitHub Copilot provider with no Terms of Service risk:

   npx @jeffreycao/copilot-api@latest --oauth-app=opencode start
   

3. Disable multi agent when using codex: If you're using codex via GitHub Copilot, it's recommended to disable the multi agent feature. Currently, GitHub Copilot charges based on the last message being a user role when using codex, and the billing logic has not been adjusted.

Project Overview

A reverse-engineered proxy for the GitHub Copilot API that exposes it as an OpenAI and Anthropic compatible service. This allows you to use GitHub Copilot with any tool that supports the OpenAI Chat Completions / Responses API or the Anthropic Messages API, including to power Claude Code.

Compared with routing everything through plain Chat Completions compatibility, this proxy can prefer Copilot's native Anthropic-style Messages API for Claude-family models, preserve more native thinking/tool semantics, reduce unnecessary Premium request consumption on warmup or resumed tool turns, and expose phase-aware gpt-5.4 / gpt-5.3-codex responses that are easier for users to follow.

Features