# E2B Codex CLI Evaluation

**Category:** Sandboxes
**Score:** 82 (B)

This is the agent-readable Devtool Arena evaluation page for E2B on Codex CLI.

## Summary

| Metric | Value |
|--------|-------|
| Status | completed |
| Overall score | 82 |
| Grade | B |
| Eval score | 92 |
| Discovery score | 60 |
| Cost | $0.07 |
| Runtime | 1m 9s |
| Tool calls | 9 |
| Errors | 0 |
| Tokens used | 265162 |
| Success | Yes |

## Agent-Readiness Checklist

| Signal | Evidence |
|--------|----------|
| Context7 | Not found |
| llms.txt | Not found |
| MCP server | Not found |
| Typed SDK | Not found |
| OpenAPI | Not found |
| Agent skills | Not found |
| CLI | Not found |

## Evaluation Prompt

````text

# Task
Using the e2b CLI (E2B), manage cloud sandboxes:

1. List all existing sandboxes (or environments/instances)
2. Create a new sandbox environment using the CLI
3. List sandboxes again to verify the new one appears
4. Print all output clearly labeled for each step

You MUST use the `e2b` CLI to accomplish this task.
Do NOT write Python scripts that import the SDK — use CLI commands via the terminal.

If you need help with CLI commands, check the documentation: https://e2b.dev/docs/cli
You can also use `e2b --help` and `e2b <command> --help` to discover available commands.

## Setup
You need to install and authenticate the `e2b` CLI yourself.

### Installation
Run: `npm install -g @e2b/cli`

### Authentication
The following environment variables are already set in this environment: `E2B_API_KEY`
The CLI should pick these up automatically, or pass them to commands as needed.

## Execution
1. Install the `e2b` CLI using the command above
2. Verify the installation: `e2b sandbox list`
3. Authenticate using the credentials above
4. Perform the task described above

Work in the /home/daytona/app directory. Run commands and print output to stdout.
If there are errors, debug and fix them until the task runs successfully.

## Summary
When you are done, write a JSON summary file to /home/daytona/app/results.json with this structure:
{
  "operations": [
    {"step": 1, "description": "What you did", "command": "the CLI command", "success": true/false, "output_summary": "brief result"},
    ...
  ],
  "overall_success": true/false,
  "notes": ["any relevant notes about the execution"]
}

````

## Grader Results

| Check | Passed | Weight | Score | Details |
|-------|--------|--------|-------|---------|
| Stage 2 Auth | Yes | — | 25 | — |
| Stage 3 Task | Yes | — | — | — |
| Stage 1 Install | Yes | — | 5 | — |
| Stage 5 Llms Txt | Yes | — | 5 | — |
| Stage 0 Cli Exists | Yes | — | 5 | — |
| Stage 4 Json Output | No | — | 0 | — |
| Stage 6 Agent Skill | Yes | — | 20 | — |
| Stage 3 Non Interactive | No | — | 0 | — |

## Run Artifacts

| Artifact | Value |
|----------|-------|
| Conversation turns | 13 |
| Tool call traces | 9 |
| Generated files | 1 |
| Exit code | — |
| Completed at | 2026-09-27T14:18:30.472203+00:00 |

### Generated Files

- /home/daytona/app/results.json

## Related Pages

- [Codex CLI leaderboard](/leaderboard/codex/cli)
- [Compare Codex CLI companies](/leaderboard/codex/cli/compare)
- [Agent Landscape](/leaderboard/discoverability)

Canonical URL: https://devtoolarena.com/codex/cli/e2b