E2B Sandbox

Use this skill when the task should run in an E2B sandbox rather than directly on the OpenClaw host.

Credentials

This skill requires E2B_API_KEY in the environment.

Configure it in Vault / env before use.

MCPorter-native setup

Register the local MCP server once:

node /home/charl/.openclaw/workspace/skills/e2b-sandbox/scripts/register-mcporter.mjs

This writes an e2b-sandbox entry into:

~/.openclaw/workspace/config/mcporter.json

Then verify it:

mcporter list e2b-sandbox --schema

Primary usage

After registration, prefer MCP tools instead of shell wrappers.

Expected tool names:

• e2b-sandbox.create_sandbox
• e2b-sandbox.list_sandboxes
• e2b-sandbox.get_info
• e2b-sandbox.exec
• e2b-sandbox.host
• e2b-sandbox.set_timeout
• e2b-sandbox.snapshot
• e2b-sandbox.kill

Example low-level calls:

mcporter call e2b-sandbox.create_sandbox --args '{"label":"codex-lab","template":"base","timeoutMs":3600000}'
mcporter call e2b-sandbox.exec --args '{"sandbox":"codex-lab","cmd":"python3 --version"}'
mcporter call e2b-sandbox.host --args '{"sandbox":"codex-lab","port":3000}'

Shell helper fallback

A wrapper still exists for debugging or environments where you want direct script access:

/home/charl/.openclaw/workspace/skills/e2b-sandbox/scripts/run-e2b.sh help

Notes

• Sandbox ids and labels are tracked in ~/.openclaw/workspace/.state/e2b-sandboxes.json.
• Prefer labels for longer tasks so later steps can refer to the same sandbox cleanly.
• The MCP server is local and uses the E2B Node SDK under the hood.
• Use this helper for one-shot command execution. If a task needs a long interactive PTY session or a specialized template flow, read references/e2b-notes.md first.
• If a task needs a custom image or preinstalled stack, create the sandbox/template first, then snapshot it for reuse.

Read next when needed

Read references/e2b-notes.md when you need:

• state-file behavior
• timeout / snapshot guidance
• port exposure reminders
• when to use MCP tools vs the shell helper