1037: WebMCP is here (and you should care)

Hosted byWes Bos

Scott and Wes talk about WebMCP with Sarah Drasner and Dominic Farolino from the Chrome team, which is the new W3C standard that lets your site hand real tools to an agent. They cover the security model, headless and multi-tab agents, and how to wire it into an app you’ve already shipped.

Show Notes

• 00:00 Intro
• 00:46 Welcome to Syntax!
• 01:18 What Is WebMCP and How Is It Different from MCP?
• 02:32 WebMCP for UI: Enabling Agents to Use Websites Directly
• 06:05 Brought to you by Sentry!
• 06:43 Is This Just a Chrome Thing? W3C Standards and Open Development
• 11:49 WebMCP Security: Annotations, Hints, and Multi-Layered Defense
• 15:26 Best Use Cases: E-Commerce, Video Editing, and Complex UIs
• 16:27 The WebMCP Challenge: 5,000 Entries and Creative Applications
• 19:20 Headless WebMCP: Running Agents in the Background
• 22:43 Multi-Tab Scenarios: Using WebMCP Across Multiple Sites
• 24:23 WebMCP and Security: Safe Origin Policy and Agent Containment
• 28:09 Performance and Core Web Vitals for the Agentic Web
• 38:11 The Future of Web Monetization: Ads, Commerce, and Agent Payments
• Universal Commerce Protocol
• x402
• 40:53 Building an Agent Platform: Extensions, Harnesses, and Browser Vendor Roles
• 45:19 Support from Anthropic, Safari, Firefox, and Other Players
• 49:11 Getting Involved: Origin Trial, Community Feedback, and the W3C Spec
• Ora
• 52:45 Sick Picks + Shameless Plugs

Sick Picks

• Scott:
• Wes:
• Dominic: Steven Pinker: The Sense of Style
• Sarah: Vintage Story

Shameless Plugs

• Scott:
• Wes:
• Dominic: X account
• Sarah: 25% discount with code Community25 at AGNTCon

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