TokenWatch: AI Cost Tracker

Know what every AI request costs. In real time.

TokenWatch lives in your Mac menu bar and shows your AI API spend as it happens. Every call your apps, scripts and coding agents make is priced the moment it completes, so you never open a surprise bill at the end of the month again.

Works with Anthropic, OpenAI and Google, plus any OpenAI-compatible endpoint.

LIVE SPEND IN YOUR MENU BAR • Today's total is always one glance away in the menu bar • Open the panel for today, this month and your projected month-end total • See your most recent requests with model, tokens and cost

YOUR BUDGET, AT A GLANCE • Set a monthly budget and watch a live ring fill as you spend • "You're on track", "Approaching your budget" or "Over budget": you always know where you stand • The ring shifts from blue to amber to red as you approach the limit

EVERY REQUEST, PRICED TO THE CENT • A full request log with provider, model, input and output tokens, time and cost • Streaming and non-streaming responses are both measured accurately • Cached-token pricing supported • Export your request log to CSV for invoices, expense reports or your own analysis

SPOT SPIKES BEFORE THE BILL DOES • Daily, weekly and monthly spend charts • Breakdowns by provider and by model show exactly where the money goes

ALERTS BEFORE YOU OVERSPEND • Daily and monthly spend limits • A native macOS notification the moment a limit is crossed

KNOW WHICH PROJECT IS SPENDING • Auto-tag requests by model name, request header or source port • Label spend per coding agent, app, chatbot or client

FORECAST YOUR MONTH • Projects your month-end total from your real daily pace • Compares the projection against your budget so you can adjust early

WORKSPACES • Keep clients and projects apart with separate API keys, totals and history

PRIVATE BY DESIGN • TokenWatch runs a lightweight local proxy on your Mac. Point your client's base URL at it and every request is forwarded straight to the provider over TLS • Usage is measured on-device. Your prompts and responses are never stored or sent anywhere else • API keys stay in the macOS Keychain • No account, no sign-up, no analytics, no tracking

Discovery signals