Backmesh

Backmesh is an open-source backend solution designed specifically to protect your LLM API keys when building client-side applications. Instead of shipping API keys directly in your frontend code where they can be easily exposed, Backmesh acts as a secure proxy between your application and LLM providers like OpenAI. It handles all API calls through a protected backend, ensuring your sensitive keys never reach the client side where they could be stolen or misused.

The tool works by implementing JWT authentication to verify that only your legitimate users can access the LLM API through Backmesh. It provides configurable rate limits per user to prevent abuse, such as limiting OpenAI API calls to 5 per user per hour. Additionally, it offers API resource access control to protect sensitive resources like files and threads, ensuring users can only access what they've created. All communication is secured with military-grade encryption, and the system is thoroughly tested for reliability.

Backmesh is particularly valuable for developers building AI-powered applications who want to avoid costly API key leaks that can result in thousands of dollars in unexpected charges. It also includes built-in analytics that track all LLM API calls, helping teams identify usage patterns, optimize costs, and improve user satisfaction without requiring additional monitoring packages. This makes it ideal for startups and development teams who need enterprise-grade security without the complexity of building their own proxy infrastructure from scratch.