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2026-03-23
FeatureUpdateFix
Week of March 17–23

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New features

  • Sandbox lifecycle configuration. You can now control what happens when a sandbox times out using the new lifecycle option on Sandbox.create(). Set on_timeout to pause (instead of the default kill) to enable resuming later, and enable auto_resume so paused sandboxes wake up automatically on incoming traffic. This replaces the previous beta_pause API, which is now deprecated. Learn more
  • fixMissing option for template package installs. The aptInstall() helper in the JS SDK and apt_install() in the Python SDK now accept a fixMissing / fix_missing option, which passes --fix-missing to apt-get install during template builds. This helps resolve incomplete package downloads without manual intervention. Learn more
  • getTags / get_tags for templates. Both the JS and Python SDKs now include a method to list all tags for a given template, making it easier to manage template versions programmatically. Learn more
  • CLI pause and resume commands. You can now pause and resume sandboxes directly from the CLI with e2b sandbox pause <id> and e2b sandbox resume <id>. Learn more
  • Detached sandbox creation in CLI. Use e2b sandbox create <template> -d to create a sandbox without attaching a terminal session. The command prints the sandbox ID and dashboard link, then exits immediately.

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Updates

  • Sandbox metrics enabled by default. Sandbox CPU and memory metrics are now collected and queryable by default — no feature flag required. You can monitor resource usage for your sandboxes without any additional configuration. Learn more
  • CLI template init uses name parameter. The e2b template init command now generates code using the current name parameter instead of the deprecated alias. Existing templates continue to work.
  • Default limit for sandbox list. The CLI now defaults to returning 1,000 sandboxes when listing, preventing unbounded queries. Pass --limit 0 to list all sandboxes.
  • Python SDK timeout handling improvements. Server-streaming requests in the Python SDK now include proper read timeouts, reducing the chance of hanging connections on slow or stalled streams.
  • Dotfiles included in template uploads. Files starting with a dot (.env, .gitignore, etc.) are now correctly included when uploading template files via the JS and Python SDKs.
  • arm64 support for the base template Docker image. The base template image is now built for both amd64 and arm64 architectures.

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Bug fixes

  • Fixed template builds on older infrastructure. Resolved an issue where template builds could fail with an “Invalid filesystem option” error on certain orchestrator versions.
  • Fixed listSandboxes pagination in JS SDK. The pagination logic in the JS SDK’s listSandboxes now correctly stops when the requested limit is reached.
  • Fixed CLI crash on non-standard API errors. The CLI error handler no longer crashes when the API returns an error without a standard HTTP status code (e.g., network failures or timeouts).
  • Fixed CLI update check. Replaced the update notification library so update checks work correctly in the bundled CLI. Errors during update checks are now caught gracefully.
  • Fixed CLI sandbox logs timeout. The sandbox logs command no longer times out unnecessarily when --follow is not set.
  • Fixed sandbox creation in self-hosted JS SDK. Sandbox headers are now correctly passed to the internal API client, fixing Sandbox.create() failures in self-hosted environments.
  • Fixed Python async SDK transport reuse across event loops. The async Python SDK now creates a separate HTTP transport per event loop, preventing errors when asyncio.run() is called multiple times or from different threads.
  • Fixed error message in Python SDK set_timeout. Corrected the error message when calling set_timeout on a non-existent sandbox (previously incorrectly referred to “Paused”).