Stacklok is a cybersecurity company focused on securing AI agents and the systems through which they interact with data and tools. The company's primary focus is on the Model Context Protocol (MCP), an emerging standard that governs how AI models and agents call and interact with external tools and data sources. Stacklok's flagship product is ToolHive, a platform designed to make MCP simpler and more secure. ToolHive provides a vetted MCP registry, a point-and-click user interface, client integrations, network isolation, and built-in security features targeted at enterprise use cases. The product addresses risks introduced when AI agents autonomously call external tools by providing governance, isolation, and controlled access mechanisms. The company builds in the open and collaborates with the broader AI and developer community. It is backed by investors including Accel, Madrona, and Bain Capital. Stacklok was founded by Craig McLuckie, who is also a co-creator of Kubernetes and the Cloud Native Computing Foundation, and previously co-founded Heptio, which was acquired by VMware. McLuckie has held leadership roles at Google, Microsoft, and VMware. The company operates with a hybrid and fully remote workforce distributed globally, and is headquartered in Bellevue, Washington. Stacklok's target market includes enterprises adopting AI agents that require security controls around tool usage and model-to-system interactions.