Jens Ernstberger
Co-founder, Kontext
Jens Ernstberger writes about AI agent security, runtime authorization, MCP, OAuth, credential management, and least-privilege enforcement for autonomous systems.
Focus areas
- AI agent security and runtime authorization
- MCP authorization, OAuth, and credential management
- Least-privilege enforcement for autonomous systems
- Compliance and audit trails for agentic workflows
Selected writing
- Agent Intent - No One Knows What It Means, But It's Provocative
Why runtime authorization for AI agents should evaluate action safety instead of trying to verify intent, with layered controls for unsafe tool use.
- Announcing Kontext
Kontext gives your AI agents proper identity, scoped access, and audit trails. So they work in production, not just in demos. One SDK. One line. This starts at kontext.require().
- How to Keep a Secret: Why Personal AI Assistants Like OpenClaw Are a Security Nightmare
A security engineering breakdown of OpenClaw's three critical failure modes: unauthenticated access, credential sprawl, and prompt injection. System model and threat model analysis with practical fixes.
- The API Key is Dead: A Blueprint for Agent Identity in the age of MCP
How to replace static API keys with OAuth 2.0 for MCP agents using scoped tokens, Dynamic Client Registration, delegation, and federation.
- Should You Care About Prompt Injection? (Probably.)
Agents read untrusted content and turn it into actions. Sanitize → detect → enforce at tool boundaries to make that speed survivable.
- Read. Write. Own. Delegate.
The next great leap in the digital age isn't just about ownership—it's about intelligent delegation. Explore how autonomous agents can amplify our capabilities while maintaining our sovereignty.
- How to Fix the TanStack Supply Chain Attack
Learn how to fix the TanStack supply chain attack with clean version pins, credential rotation, package release cooldowns, split publish workflows, and runtime authorization.
- How Do I Enforce Least Privilege for AI Agents Using External Tools?
Learn how to enforce least privilege for AI agents using external tools with runtime authorization, scoped credentials, MCP gateways, Kontext CLI, and audit trails.