# Alter Launches Access Control for Multi-User AI Agents A proxy-based security layer managing downstream credentials for enterprise agent authentication. - **Source:** [Hacker News: Front Page](https://brifing.si/source/b07aa772-b1a0-4a76-aa18-719c6f9e2dde) - **Published:** 2026-10-21 - **Topic:** [Software & Engineering](https://brifing.si/c/engineering) - **Original article:** - **On Brifing:** https://brifing.si/s/dacdfea9-cdd6-41bd-ad37-3df70eca6cfe ## The Agent Authentication Gap Developers building internal agents often face a critical security flaw when using shared API keys for external systems like CRMs or billing platforms. While Slack handles user-level authentication, the agent lacks visibility into individual identities when executing downstream actions. This creates a dangerous environment where agents possess excessive, unconstrained system permissions. ## Proxy-Based Identity Management Alter functions as a proxy layer that intercepts API requests to manage downstream credentials dynamically. By mapping end-user identities to specific agent actions, the platform ensures that every request is authorized based on the individual user's permissions. This mechanism effectively bridges the gap between conversational interfaces and secure enterprise backend systems. ## Compliance and Policy Enforcement The platform enforces fine-grained runtime policies while generating audit logs suitable for regulated industries. Founders Srikar and Kevan developed this solution to address the prohibitive costs of building custom multi-tenancy authentication. These controls allow developers to maintain strict security postures without sacrificing the operational agility required for modern AI agent deployments. ## Origins in Regulated Environments The founders identified this need through their professional backgrounds at Goldman Sachs and deep-tech database startups. They recognized that building secure, scalable auth for multi-tenant agents was a recurring, complex challenge. By creating a dedicated product category for agent security, they aim to simplify the plumbing required for enterprise-grade deployments. ## Diverse Real-World Use Cases Current implementations range from GTM automation tools to back-office agents managing payroll platforms like Rippling and QuickBooks. Notably, a defense contractor is utilizing Alter to secure air-gapped agents for the Marine Corps. These diverse applications demonstrate the platform's flexibility in handling sensitive data across various high-stakes operational environments and technical architectures. ## Reliability and Infrastructure Support Alter provides support for hundreds of providers, with each integration undergoing manual end-to-end testing to ensure maximum reliability. The platform handles the complex backend plumbing, allowing developers to focus on building agent logic. Upcoming features include an LLM gateway with built-in guardrails to further enhance the security of agent-based interactions. ## Shift-Left Security Philosophy The development team has adopted a shift-left security approach to ensure the product remains resilient against emerging threats. Every pull request undergoes continuous checks for supply chain vulnerabilities and dangerous code patterns. This rigorous internal process reflects their belief that security must be deeply integrated into every stage of the software development lifecycle. ## Usage-Based Business Model The company operates on a usage-based pricing model designed to scale with developer needs. A free tier is available for up to 10,000 requests, providing an accessible entry point for teams to test policies and OAuth configurations. This structure encourages developers to experiment with secure agent delegation while maintaining a clear path for growth. ## Sources covering this story - https://alterauth.com/ — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._