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E2B Ships Firecracker MicroVM Sandbox for Agent Code Execution — 150ms Cold Start, Kernel-Level Isolation, Python/JS SDKs, 12K+ Stars
E2B provides Firecracker microVM-based sandboxes purpose-built for AI agent code execution with kernel-level isolation — each sandbox runs its own kernel, unlike Docker's shared-kernel model. Cold starts at 150ms. The SDK is designed around agent workflows: spawn a sandbox, run AI-generated code, process data, and tear down. Setup time is ~2 minutes for managed cloud or ~5 minutes for local MCP integration with Claude Desktop/Cursor. The latest SDK (May 22, 2026) supports both Python and JavaScript. This is the infrastructure layer that makes untrusted agent code execution safe in production.
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