Peter Steinberger tweet: a lion doesn't concern itself with token counting

Unfortunately, not all of us are lions.

Most of us watch our token bills.

Haku.
The magic of your agents,
85% fewer tokens.

An MCP server that plugs into Claude Code, Cursor, or any MCP agent — and makes every action cheaper.

Start free 14-day trial

No card. No signup.

Then $39 once · lifetime license · no subscription

See what's included

How we save you tokens

Cut your agent's browsing bill
by 85%.

Existing tools — Chrome DevTools MCP, Playwright, screenshot agents — dump the entire page into your agent's context. Every button, every link, every menu item. Haku runs a tiny on-device model that filters to just the few elements your agent actually needs.

Existing tools

142 buttons on the page~12K
88 links~8K
34 inputs & selects~6K
Menus, modals, footer…~24K

~50,000 tokens dumped into context

Haku

click_submit_button
fill_email("value": "...")
select_from_dropdown("option": "...")

~7,500 tokens. Just the relevant tools.

Compounds over time

Your agent gets sharper
with every task.

Haku keeps what it learns. Every search, every note, every code lookup saves locally — so the next run starts ahead, and cheaper.

Research, cached forever.

Every web search and doc lookup saves to a local DB. Next agent checks the cache first.

Zero tokens on a cache hit.

Agents leave notes.

Every finished task writes a note. Next agent on a similar task reads it before exploring.

No re-discovery cost.

Semantic code search.

Index a repo once. Then search by intent instead of grep + read + read + read.

12K → 200 tokens.

Native Mac automation.
Finally seamless.

Below: one prompt. Haku drives Chrome across Google Flights, Kayak, Booking, Luma, and Gmail — live data, real interactions, finished email in your inbox. One take.

Works with

M
Mail
C
Calendar
N
Notes
R
Reminders
M
Messages
S
Safari
C
Chrome
F
Finder
S
Slack
N
Notion
L
Linear
F
Figma
C
Cursor
W
WhatsApp
Z
Zoom
S
Spotify

… and any other Mac app. If it has a window, Haku can drive it — with the same 85% token savings.

Codex Computer Use vs Haku.

Computer Use for Codex shipped a week ago. We ran it head-to-head with Haku on a reminder and an Amazon checkout, then asked the agent itself which it preferred.

Codex’s own rule of thumb: Computer Use used two to four times more context than Haku on the same tasks.

If you're a developer
like us,
use Haku to record your demos.

Just like we did here.

Bring an ElevenLabs or OpenAI key — or use the on-device TTS and stay fully local.

Privacy

Your Mac. Your data.
Nobody else's.

Haku runs entirely on your machine. No telemetry. No cloud. No analytics. Your research cache, your code index, your recordings — all local, all yours.

No telemetry

Zero data sent anywhere. No usage tracking, no analytics, no phone-home.

Fully local

On-device intelligence, local research cache, local code index. Nothing leaves your Mac.

Apple notarized

Signed and notarized by Apple. No shady binaries. Verified and trusted.

Pricing

Pay once. Keep forever.

Pays for itself in saved tokens within a week.

Launch week · code LAUNCHWEEK · 30% off
$39

One-time · Lifetime license

  • On-device intelligence — 85% fewer tokens
  • Research MCP — never repeat a search
  • Agent notes — no re-exploration
  • Code Search MCP — semantic codebase search
  • Full Mac + browser automation
  • Free updates for life
Start free 14-day trial

No card. No signup.

Or buy lifetime license — $39

Requires macOS 14 (Sonoma) or later

FAQ

Questions

What runs on my Mac vs. in the cloud?
Everything Haku does runs locally: the filtering model, the research cache, the note store, the code index, and the on-device TTS. The only things that touch the cloud are your agent itself (whichever LLM you chose) and any cloud TTS provider you optionally configure.
Does Haku need Accessibility permission?
Yes, for native app control. Haku reads the Accessibility tree to discover buttons, inputs, and menus — the same API screen readers use. Grant it once in System Settings → Privacy & Security → Accessibility. Browser automation doesn’t need it (it runs through Chrome DevTools Protocol).
Do I need to bring my own AI?
Yes. Haku is the automation layer, not the model. Plug in whatever you already use — Claude Code, OpenClaw, Codex, or any custom MCP client.
Can my team share the local research and notes?
The databases are SQLite files in ~/.haku. Commit them to a repo, sync them with your existing tooling, or ignore them entirely. Everyone’s setup is theirs to choose.
Subscription or one-time?
One-time. $39 for a lifetime license, including future updates. Fourteen days to try it free, no card needed.
Why the name Haku?
Haku (白) means “white” or “pure” in Japanese. He’s the river spirit from Spirited Away who moves between the human world and the spirit world. Like him, Haku bridges two worlds: your AI and your Mac.