The same starting point
CodexBar is a well-made free menu bar app: open source, with regular commits at the time of writing, showing usage windows, credits, spend, status, and reset timers for a long list of AI providers. It also offers usage widgets, quota warnings, and an optional Agent Sessions list for active or idle Claude Code and Codex sessions on local or SSH-reachable hosts, with jump back to the owning app. AgentPeek starts from the usage side with live usage gauges in the menu bar: 5-hour and 7-day windows for Claude Code, Codex's 7-day window, Cursor's monthly window, and token totals for the agents that keep local records, read from what is already on your Mac with no extra sign-in.
Deeper session state and controls
The difference is depth and agent breadth. CodexBar's Agent Sessions surface lists Claude Code and Codex presence, active or idle state, project or title, age, and a jump action. AgentPeek models detailed session activity across its supported agent brands:
- Live state per session: executing, thinking, waiting, or idle, with the transcript, diffs, and todos each agent exposes.
- Permission prompts and questions answered with a keystroke, without a window switch.
- Follow-up prompts sent into resumable sessions, with the reply streaming back.
- Session alerts for approvals, qualifying completions, unanswered prompts, runaway processes, and supported usage or cost thresholds.
More surfaces than a menu bar
AgentPeek also spends the Mac notch on your agents: a compact pill that expands the moment something needs you, with the prompt already laid out. The Agent Board floats a kanban of every session, while session widgets pin todos, transcripts, subagents, or tools to any display. Local dev servers get their own list. AgentPeek's widgets carry session content and usage gauges; CodexBar's WidgetKit surface carries supported provider usage.
Different scope, different price
CodexBar is free (MIT-licensed at the time of writing) and broader across usage providers. AgentPeek charges for a different product scope: detailed monitoring for twenty-six public agent brands with a response path wherever an agent proves one, plus the notch, Agent Board, session widgets, Views, dev servers, and notification controls. Every AgentPeek release is in the public log. The license is one-time, $19.99, with a free 3-day trial.
Feature snapshot as of August 2026; check each project's repository for current features and license.