TokenBrake is a paid tool — $99/yr — and the first 14 days are free with everything unlocked. No card, no account, no signup. Download it, point one URL at it, and see every AI on your Mac: cloud dollars and local watts in one menu-bar glance, with a hard cap on a runaway API bill.
⬇ Download & start the 14-day trial (.zip)~/TokenBrake.brew install swiftbar…or download from swiftbar.app.~/TokenBrake/swiftbar. A 🔥 $… appears in your menu bar. Your local models show up automatically — nothing to configure.node ~/TokenBrake/proxy.mjsOpenAI → http://localhost:8787/openai
Anthropic → http://localhost:8787/anthropicYour API key passes straight through and is never stored.node ~/TokenBrake/set-budget.mjs openai 20 hardNothing breaks, and nothing about your API traffic ever stops — that's a promise, not a policy. TokenBrake sits in front of your production calls, so it will never hold your pipeline hostage over a licence.
What changes is scale. After the trial, TokenBrake keeps metering and keeps enforcing the budget caps you already set, but it drops to one monitored agent and the spend history and CSV export switch off. Buy a licence and it comes straight back — Solo $99/yr for up to 3 agents, Business $490/yr for unlimited.
The safety brake never expires. We're not going to remove the thing that stops a runaway bill because you didn't pay us. See pricing →
🔒 Never stores your API keys or your prompts. The proxy forwards your key to the real provider and keeps only token counts and dollars. No cloud account, no data leaves your Mac. It's a safety brake, not a warranty — it dramatically cuts bill-shock; it can't promise a bill will never exceed a budget.