The first ever protocol
for browser-website cooperation
Websites expose actions. Browsers execute them. Users get work done by expressing intent, not clicking through UI.
We're onboarding a small group of teams to ship the first wave of ASTRAL-ready actions.
The web worked.
Until AI browsers arrived.
The way we browse the web hasn't really changed in over a decade.
On one side, we have browsers. They have historically been made to show us and let us interact with pages, not to understand them. Up until now, they have mostly been passive windows to the web.
On the other side, we have websites. They've actually evolved a lot: from static HTML in the 90s, to interactive sites in the 2000s, to full web apps today.
But lately, things have changed massively: Now we have browsers that can act on websites on our behalf. They can plan, reason, and execute. And suddenly, browser-website communication matters more than ever. If browsers can act, they need to truly understandthe sites they visit.
The problem? Every current attempt at letting browsers take action on a website is brittle. It relies on AI guessing what a site means or can do. Meanwhile, websites have always been designed for human use and haven't adapted to the rise of agentic browsers. There's still no native way for these two sides to work together.
There's a disconnect, a gap. There's no bridge, no shared language, no way for them to cooperate.
Until now.
Introducing ASTRAL
ASTRAL is the first protocol for browser-website communication. It creates a shared language between websites and intelligent browsers. Websites expose safe, structured actions. Browsers execute them on behalf of users.
Websites decide what can be done
Sites expose structured capabilities. Each action comes with input schemas, auth requirements, and constraints. A clear contract defining what's possible and what's protected.
Browsers decide when and how to use them
The browser discovers these capabilities, understands user intent, and orchestrates the right actions at the right time. Now the browser knows exactly what the site can do.
The result? A new, enhanced layer of the internet. One that works on intent.
A truly agentic web
Webites expose primitives. The browser becomes the "brain". It understands intent and decides when and how to use them. The website becomes truly agentic, without having to implement AI at all.
Safe by design
Websites define the rules, constraints, ui regions browsers can interact with. Browsers respect them. No rogue actions, no unauthorized access. Complete control stays with the site.
Multi-site orchestration
Browsers can chain actions across different ASTRAL-enabled sites. 'Apply to these job postings, and save a list of the applied jobs in my notes'. All executed seamlessly across multiple platforms.
Visual interactions with the UI
Websites define UI regions browsers can interact with. Users see real-time feedback of what's happening, enhancing the browsing experience.
The next step for the web
The internet keeps evolving. We went from static HTML to dynamic sites to full web apps. But it doesn't stop there. With ASTRAL we unlock a new layer of nativity and intuitiveness. Users say what they need. The browser understands the site's purpose and capabilities, and executes them safely.
The result feels simple: you say what you need, it gets done.
What it looks like
Watch the Cleo browser interact directly with two mock sites (a to-do list, and a text editor) using the ASTRAL protocol. The browser understands the capabilities each site exposes and makes changes right in the UI.
Cleo, an ASTRAL-ready browser
Cleo is our agentic browser that understands ASTRAL actions today. You speak or type what you need. Cleo interprets it, discovers the site's exposed actions, and executes safely.
We built Cleo to prove the vision. It's a capable browser on its own, but when on an ASTRAL-enabled site, it knows exactly what the website can do
Help us shape the future of the web
We're inviting a small group of teams to add 2 to 4 ASTRAL actions to their product. We'll work directly with you to implement them, film a 60-second demo, and share outcomes. In return you get co-marketing, early influence on the ASTRAL spec, and a faster path to agentic UX.
What you get
FAQs
Does ASTRAL replace my UI?
No. It clarifies your app's capabilities so people and agentic browsers can operate them directly.
Is this safe?
As the developer, you define the actions, inputs, and guardrails. Nothing runs outside what you expose.
Do I need Cleo?
No. Cleo is the first ASTRAL-aware browser. Others can implement the same contract.
How long does the first integration take?
Most partners ship 2 to 4 actions in under a week.
What if my app is complex?
Start with one high-frequency action. Expand as value becomes obvious.