Token Monitor Shows AI Coding Usage on a 4-Inch Screen

Token Monitor is a small square desktop display whose entire job is telling you how much of your AI coding assistant quota you have left. It is a narrow purpose, and that is the appeal — this is a dedicated instrument rather than another dashboard tab, built on an ESP32-S3 with a 4-inch touchscreen and a local broker service that keeps your credentials on your own machine.

• 4-inch 480x480 IPS touchscreen with 5-point capacitive touch in an 86x86 mm 3D-printed ABS enclosure
• ESP32-S3 dual-core running up to 240 MHz with 512 KB SRAM, 8 MB PSRAM, and 16 MB flash
• Tracks quota consumption, session limits, token counts, reset timers, and estimated costs for Claude Code, Codex CLI, and Antigravity CLI
• Kickstarter Super Early Bird at 99 euros, roughly $115, with first shipments targeted for November 2026

What Is Inside the Token Monitor?

The hardware is a sensible match for the job. An ESP32-S3 at 240 MHz with 8 MB of PSRAM has ample headroom to composite a 480x480 framebuffer through LVGL, which is what the firmware uses, and 16 MB of flash leaves room for assets and over-the-air updates. Wi-Fi 4 and Bluetooth LE 5 handle connectivity, and an optional single-cell Li-ion pack gives more than five hours off the desk.

The 86x86 mm footprint is deliberate — it is the standard wall-plate dimension, so the enclosure sits neatly next to a keyboard or mounts flush. Anyone who has followed the recent run of ESP32-S3 desk gadgets, from the CtrlVibe AI console keypad to the ZecTrix Note 4 e-paper notepad, will recognize the pattern: one chip, one screen, one job done properly.

How Does It Read Your Coding Assistant Quota?

This is the part that matters for anyone security-conscious about API keys. The device does not talk to vendor APIs directly. A local broker service called tokenmonitor-mcp runs on your machine, fetches usage data, and transfers it to the display over a secure connection. The broker is Apache-2.0 licensed and published on GitHub, and the firmware includes Model Context Protocol integration.

Keeping the credentials on the workstation and pushing only derived numbers to a Wi-Fi microcontroller is the right architecture. It also means the supported-tool list is a software question rather than a hardware one — the broker is open, so adding another CLI is a pull request, not a new product.

What Does Token Monitor Cost?

The Super Early Bird tier is 99 euros, about $115, for the white unit; standard Early Bird runs 120 euros. The campaign targets a 25,000 euro goal, with first shipments planned for November 2026 to the US, Canada, the EU, and the UK.

As always with crowdfunding, the shipping date is a plan rather than a promise — treat the November target as the earliest reasonable case. What is already real and verifiable is the broker software, which is on GitHub under a permissive license today. If the campaign goes sideways, that code still works with any display you already own.

Is a Dedicated Quota Display Worth Desk Space?

If you run agentic coding sessions long enough to hit a session limit mid-task, the honest answer is probably yes. Quota exhaustion during a long refactor is the kind of interruption that costs more than the device — a glanceable reset timer changes when you start the expensive run. If your usage is light, a terminal command covers it fine.

The broader signal is more interesting than the gadget: AI usage metering is now a category worth building dedicated hardware for. Our mini PC and SBC coverage has tracked a steady drift toward small purpose-built instruments, and this is a clean example.

Sources: CNX Software — August 7, 2026; Token Monitor on Kickstarter — August 2026.