How to securely connect ADK agents to models on Cloud Run (leoy.blog)

A recent guide has been released detailing how to securely connect Agent Development Kit (ADK) agents to models hosted on Google Cloud Run using the LiteLLM connector. The guide addresses the authentication challenges faced when accessing non-Gemini models on Cloud Run, emphasizing the importance of Google-signed OpenID tokens for safe communications. With Google Cloud Run's enforced access control via Identity and Access Management (IAM) policies, only authenticated requests are accepted, significantly enhancing security against unauthorized access. The guide outlines three methods for implementing ID token injection into the LiteLLM connection: using a static header for quick deployments with infrequent requests, implementing dynamic token refreshing for long-running agents, and utilizing a litellm-proxy for centralizing the authentication logic. This flexibility allows developers to choose the best method based on their agent deployment scenario, making it easier to integrate AI models into their applications. By simplifying the authentication process, this guide aims to foster more secure and effective use of AI models in cloud environments, ultimately contributing to the growing alignment of AI/ML with best security practices.