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June 15, 2026

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New features

Sandbox lifecycle flags in the CLI. e2b sandbox create now accepts --lifecycle.autoresume and --lifecycle.ontimeout, plus a --timeout option. Configure auto-resume and pause-on-timeout behavior directly from the CLI without writing a script. See Auto-resume.Send and close stdin from a command handle. Background commands now expose sendStdin() and closeStdin() directly on the returned handle (JS) and send_stdin() / close_stdin() (Python, sync and async). You no longer need to pass the PID back to commands.sendStdin(). The command must be started with stdin: true. See Background commands.Opt in to watching network mounts. envd adds an allow_network_mounts option on filesystem watch requests so you can explicitly watch paths on NFS, CIFS, SMB, and FUSE mounts, which are rejected by default. See Watch directory.

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Updates

JS and Python SDK behavior aligned. Several differences between the JS and Python SDKs were reconciled so both surfaces behave the same way for command execution, filesystem operations, and error handling.e2b template build (v1) fully deprecated. The legacy e2b template build command no longer runs a build — it prints the v2 migration notice and exits. Use e2b template create and the v2 migration guide instead.API-only request header options. The SDKs now expose an option for setting headers that apply only to control-plane API requests, separate from envd headers. Useful when fronting E2B with a proxy or gateway.

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Bug fixes

  • Volume SDK reliability. Fixed transport handling, request timeouts, empty-file uploads, and eager stream errors in the volume client.
  • Sandbox.kill() returns a boolean. The JS Sandbox.kill() instance method now returns whether the sandbox was killed, matching its static counterpart.
  • getMetrics query parameters. start and end are now passed correctly as query parameters in the JS SDK.
  • Clearer API errors. Non-2xx responses from the API and envd with empty bodies now raise proper errors instead of failing silently.
  • HTTP/2 retries (Python). The Python SDK now retries connection failures on HTTP/2 API transports.
  • Async transport caching (Python). Async transport caches are now keyed by the event loop object rather than its id, preventing reuse across recreated loops.
  • Pause upload retries. Sandbox pause uploads now retry on transient failures, making pause/resume more reliable.