# Telnyx Codex CLI Evaluation

**Category:** Voice Telephony
**Score:** 26 (D)

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

## Summary

| Metric | Value |
|--------|-------|
| Status | completed |
| Overall score | 26 |
| Grade | D |
| Eval score | 23 |
| Discovery score | 35 |
| Cost | $0.00 |
| Runtime | 1m 26s |
| Tool calls | 6 |
| Errors | 2 |
| Tokens used | — |
| Success | No |

## 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 telnyx CLI (Telnyx), perform a telephony workflow.

If the CLI supports messaging, send a ***** SMS using sandbox or ***** credentials and print the response.

If the CLI focuses on calling or phone resources instead, list available phone resources or create a ***** telephony resource and print the result.

Use the CLI directly for the operation.

You MUST use the `telnyx` 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://developers.telnyx.com/development/cli
You can also use `telnyx --help` and `telnyx <command> --help` to discover available commands.

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

### Installation
Run: `go install github.com/team-telnyx/telnyx-cli/cmd/telnyx@la*****`

### Authentication
API credentials are available as environment variables in this environment.
Check what environment variables are set (e.g. `env | grep -i key` or `env | grep -i token`) to find credentials.

## Execution
1. Install the `telnyx` CLI using the command above
2. Verify the installation: `telnyx --version`
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 | No | — | — | — |
| Stage 1 Install | Yes | — | 5 | — |
| Stage 5 Llms Txt | No | — | 0 | — |
| Stage 0 Cli Exists | Yes | — | 5 | — |
| Stage 4 Json Output | No | — | 0 | — |
| Stage 6 Agent Skill | No | — | 0 | — |
| Stage 3 Non Interactive | No | — | 0 | — |

## Run Artifacts

| Artifact | Value |
|----------|-------|
| Conversation turns | 8 |
| Tool call traces | 6 |
| Generated files | 0 |
| Exit code | — |
| Completed at | 2026-10-04T10:41:40.219276+00:00 |

## 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/telnyx