Open-source (Apache-2.0) Kern boots a real Linux container in about 3.5ms from a static binary: rootless, daemonless, 0 RAM at rest, cheap enough to sandbox untrusted or model-generated code per call. Ships Python/Node SDKs plus an MCP server for Claude Desktop and Cursor (getkern.dev / github.com/getkern/kern).

Key Takeaways

  • ✓Shape: Apache-2.0 static-binary kernel-level Linux sandbox.
  • ✓Perf: ~3.5ms boot, rootless, no daemon, 0 RAM at rest.
  • ✓Integrations: Python/Node SDKs plus Claude Desktop / Cursor MCP.
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