Hark's Handoff browser agent treats your site as the API
Brett Adcock's Hark launched Handoff, a browser agent that clicks through sites with no API. Here's what agent traffic means for your storefront.
Hark shipped its first product this morning: Handoff, a browser agent that drives a real browser on a real website instead of calling an API. The demo list is the point — Target, Walmart, OpenTable, LinkedIn, DoorDash, United. None of those gave Hark an integration. The agent just clicks. If you run a storefront or a booking flow, that's the browser agent story that actually reaches you.
What actually happened
Per TechCrunch, Handoff reads a page's structure plus its visual layout to decide where to click and what to type, and runs inside a dedicated virtual computer. It's a research preview today with a waitlist; general access is promised later this summer.
Hark is Brett Adcock's fourth company, after Vettery, Archer Aviation, and Figure AI. It raised a $700M Series A in May at a $6B valuation, led by Parkway Venture Capital with Nvidia, AMD, Intel Capital, Qualcomm Ventures, Salesforce Ventures, and ARK Invest participating.
Now the parts to hold loosely. The company's announcement claims a top score on the OM2W benchmark over Anthropic, OpenAI, and Google models, and serving at "less than 1/10th the token price" of comparable systems. No published price list, no third-party benchmark run, no latency figures. The 74.9% figure for how much computer use happens in a browser is Hark's own internal research. Treat all of it as vendor marketing until someone else runs the test.
Why agent traffic matters for your business
Your website is now a machine interface whether you designed one or not. Agents that need no API don't ask permission and don't appear in a partner list. They show up as sessions — with a mouse, a viewport, and a checkout attempt.
Three things break first. Bot detection that scores headless browsers will flag legitimate customer-directed agents, or wave through the ones you'd want to stop. Rate limits tuned to human pace get hit by an agent filling a cart in four seconds. And anything gated behind a hover state, a modal, or an unlabeled icon button becomes an invisible dead end.
The fix is boring and it's the same work as accessibility: semantic markup, labeled controls, stable selectors, structured product data, a real error state instead of a red border. A page an agent can operate is a page a screen reader can operate. You already had a reason to do it.
Key takeaways
- Hark launched Handoff on August 5 — a browser agent for sites with no API, in research preview with a waitlist
- Hark raised $700M at a $6B valuation in May; investors include Nvidia, AMD, Intel Capital, and Salesforce Ventures
- The benchmark win, the 1/10th token price, and the 74.9% browser-use stat are all company claims with no independent test
- Agent traffic arrives as ordinary sessions — your bot rules and rate limits are the first things to misfire
- Semantic markup and labeled controls make a page operable by agents and assistive tech alike
Can an agent complete a purchase on your site right now? Most can't, and the failure is usually a modal or an unlabeled button. We audit and rebuild storefront flows so software and people can both get through. See how we work, or send us your checkout flow.
Sources: TechCrunch, Hark press release.
- #ai-agents
- #browser-automation
- #hark
- #ecommerce
- #apis
Tommy Rush — Founder, Rush Commerce
Operator turned builder. 15+ years running operations — now shipping the systems businesses run on. More
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