Reads the page, not your browser
It pulls the article text, the form fields, the console errors and the headers — the relevant slice, not a dump of everything you have open.
Chrome extension · a rabbit hole for your browser
It lives in your browser.
Not in another tab.
Leverine reads the page you're already on, takes orders in plain language or from a menu, and switches into a role when the job changes — General, Bug Bounty, Research, Writing.
- No account to start
- Bring your own API key, or use Cloud
- Asks before it clicks
what happens if I switch this tab to an iPhone?
✓ net.set_ua · allowed by policy · 31 ms
Switched this tab only. The site now serves the mobile layout — the nav collapses and the
“Download” button moves above the fold.
⌁ asking before it clicks “Install”
go ahead
✓ dom.click · approved by you · 88 ms
Clicked. Effect: navigation →
/mobile/download.
Attach page · switch role · ⌘K
Replace with a 6–10s screen capture of the real panel (img/hero.gif).
The copy-paste tax
Every question costs you the page.
Open a tab. Find the chat. Paste the URL. Paste the text. Lose the scroll position. Do it again in three minutes when the answer needs more context.
The page already has the context. Leverine stays on it, reads what matters, and acts where the context lives.
What it actually does
Four things, done properly.
Menu or sentence
Click a row when you know what you want. Type a sentence when you don't. Both end in the same place: an action you can see, approve, or stop.
Roles change the tools
Bug Bounty gets user-agent overrides, header probes and a session report. General gets a clean summarizer with none of that clutter. Same extension, different job.
Your key, or ours
Bring your own API key and page text goes from your browser to the model you picked — nothing passes through us. Or use Cloud and we hold the key and meter the usage.
Roles
One extension. Four jobs.
Pick a role and the panel changes its tools, its tone and its starter prompts.
General
For the page you didn't plan to read. Summaries, comparisons, forms, translations.
- “Summarise this 4,000-word thread, then draft a reply in my voice.”
- “Fill the shipping form from the invoice on the other tab.”
- “Is this contract clause unusual, or boilerplate?”
read pagefill formsclipboardsummarise
Draft a reply →
Drop img/role-general.png here.
Bug Bounty
For the target you're allowed to test. Overrides, capture and a record of what was done.
- “Switch this tab to an iPhone user-agent and tell me what changes.”
- “Probe
X-Forwarded-Foron this endpoint and show me the response headers.” - “Audit the security headers, then open the two worst findings in tabs.”
UA overrideheader overridenetwork capturescript runnersession report
net.set_ua allowed
net.set_headers allowed
devtools.network ask
script.inject deny
Every call logged →
Drop img/role-bounty.png here.
Research
For reading across sources without losing the thread.
- “Find every claim in this article that has no citation, and list them.”
- “Extract the comparison table into bullets I can paste into notes.”
- “Compare this page's pricing table with the one I attached earlier.”
read pagefind passagesextract tablesopen tabs
3 claims without sources
Drop img/role-research.png here.
Writing
For the reply you owe someone, using the page as the source.
- “Rewrite this paragraph at half the length without losing the numbers.”
- “Match the tone of my last three replies on this thread.”
- “Turn these release notes into a customer email.”
read pageselectionclipboardtemplates
Copy to clipboard
Drop img/role-writing.png here.
How it feels
Open, ask, done. It's already there.
-
01
Land on a page
The panel is docked and already knows the title, the URL and what kind of page it is.
-
02
Ask, or click a row
One sentence, or a menu item. No tab juggling, no pasting, no re-explaining.
-
03
It acts — or asks
Reads happen immediately. Clicks, form fills and navigation stop for your approval, with the exact target highlighted first.
Trust
It can touch the page. Only as far as you allow.
21 capabilities, four tiers
Read, soft, write, danger. Each one has its own switch and its own policy. Tier four can never be auto-approved.
Approval that shows the target
Before a click, Leverine outlines the element. If the page tried to instruct the model, the sheet says so.
An audit trail, not a promise
Every tool call is recorded with its decision and outcome. Arguments are hashed, not stored.
“Bring your own key. It stays in your browser, and requests go straight to the provider you chose.”
OpenAI · Anthropic · DeepSeek · Ollama · any OpenAI-compatible endpoint
“Every tool call is authorised before it runs, then recorded — decision, target, outcome. Arguments are hashed, not stored.”
Danger-tier actions always need an explicit approval
21
capabilities, each independently switchable
0
accounts needed for a bring-your-own-key setup
Pricing
Free to start. Pay for the workflow, not the chat.
Bring your own API key and the free tier never expires. Pro buys the professional capabilities; Cloud removes the key entirely. Prices in USD, VAT included.
Free
$0
forever
- Page reads, summaries, forms
- Click / fill with approvals
- Security-header audit
- Bring your own API key
Pro
$99/yr
or $12/mo · two months free on annual
- User-agent & header overrides
- Debugger network capture
- Script runner
- Structured session reports
Cloud
$10+
credit packs · no API key
- Managed inference, metered
- Pro features included
- Free trial on sign-in
- Top up whenever
Founder lifetime licence — $199 for the first 150, Pro on two devices. Teams from $29/seat.
Stop pasting into a chat box.
Install it, point it at the page you're on, and give it one job.
Chrome 116+ · no telemetry · bring your own key or use Cloud · unpacked builds welcome