Claude Relay Service is a self-hosted API relay proxy that unifies access to Claude, OpenAI, Gemini, and Droid subscriptions through a single service.
The tool addresses the problem of fragmented access to multiple AI services and the privacy concerns of using third-party mirror services. It works by running a relay server that sits between clients and the official APIs, managing multiple accounts, distributing requests across them, and tracking usage. This approach allows users to share subscription costs among friends while maintaining direct connections to official APIs rather than routing through untrusted intermediaries.
The project suits teams or groups wanting to share Claude Code Max subscriptions cost-effectively while retaining control over their data. It is appropriate for users in regions with access restrictions, those concerned about conversation privacy with third-party mirrors, and developers with technical capacity to self-host and maintain infrastructure. The README emphasizes that this approach differs from public mirror services by keeping all API requests on your own server, providing transparent cost tracking, and eliminating the performance degradation that occurs when many users share a single mirror endpoint.
The project carries security-focused development activity, with a critical authentication bypass vulnerability in earlier versions prompting an urgent update notice and recommendation to migrate to a successor project. The codebase is written in JavaScript and includes a web administration panel for multi-account management, usage statistics, and monitoring. The project provides detailed documentation addressing user concerns about terms of service compliance and includes explicit disclaimers about account risk and user responsibility.
