1037: WebMCP is here (and you should care)

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

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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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