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E2B Sandbox

harness
Assess

E2B is the de-facto reference for securely running LLM-generated code: Firecracker-based microVM sandboxes with an SDK (Python/TS) that spins up isolated environments in ~150ms - the isolation layer behind the Code Execution pattern. Its API has become the standard others emulate (e.g. CubeSandbox advertises E2B compatibility).

  • OSS core plus a managed cloud; microVM isolation is the accepted security bar for untrusted agent code ("a container is not a sandbox").

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