Codex CLI Monitoring & Telemetry

Codex exports logs, traces, and metrics via OpenTelemetry. Optelly captures token usage, reasoning tokens for o3/o4 models, tool decisions, and conversation-level activity — visualized in a live 3D workspace.

What You Get

Token & Reasoning Tracking

Track input, output, and cached tokens per request. For o3 and o4-mini models, see reasoning token counts — understand how much "thinking" your agent does.

Tool Call Visibility

See every tool invocation with accept/reject decisions, execution duration, and success status. Know when your agent is blocked waiting for approval.

Conversation Timelines

Review past conversations with full event history — API calls, tool results, SSE events, and auth recovery — stored with up to 90-day retention on Pro.

Multi-Signal OTel

Codex exports logs, traces, and metrics natively. Optelly connects with one command — no proxy, no wrapper, no SDK.

Setup in 30 Seconds

1. Install

Run npx optelly setup — this configures the OTel environment variables that Codex reads automatically.

2. Code

Launch Codex as usual. Telemetry is exported automatically via OpenTelemetry — no changes to your workflow.

3. Watch

Open optelly.com to see your Codex agent in the office. Track costs, tokens, and session activity live.

Get Started — Free

npx optelly setup

Also works with Claude Code and Gemini CLI