Tailscale

Tailscale is one of the most operationally elegant networking tools in recent memory, and it has become increasingly relevant for agent infrastructure. Agents frequently need access to private databases, internal APIs, and self-hosted services that are not publicly routable. Tailscale provides that connectivity with almost no operational overhead compared to traditional VPN setups, which makes it worth knowing about for any team running agents against private resources.

The API surface covers device management, network policies, and authentication flows with a clean REST interface. For infrastructure automation, that means agents can query mesh state, manage access controls, and even provision ephemeral nodes for isolated agent environments. The depth of API coverage has grown significantly and continues to expand.

Identity integration is where Tailscale stands out technically. Auth is tied to identity providers (Google, GitHub, Microsoft, etc.) rather than ad-hoc VPN credentials, which makes policy and access auditing far more tractable than traditional VPN management. For teams that care about access hygiene, this is a substantive operational advantage.

Reliability and performance inherit from WireGuard's strong foundation. The overlay is fast, the protocol is audited, and the control plane is robust. The main operational concern for agent workloads is what happens when the Tailscale control plane is unreachable — teams should understand how existing tunnels behave during control-plane outages.

Documentation is excellent — among the best in the DevOps/networking category. The KB is comprehensive, the conceptual explanations are clear, and the 'how it works' material is enough to reason about security properties without needing to read source code. Teams new to zero-config networking will find it easier to adopt than the operational simplicity implies.