1037: WebMCP is here (and you should care) from Syntax - Tasty Web Development Treats

Syntax - Tasty Web Development Treats

Wes Bos & Scott Tolinski - Full Stack JavaScript Web Developers

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1037: WebMCP is here (and you should care)

56 minutes Posted Sep 9, 2026 at 11:00 am.

Intro

Welcome to Syntax!

What Is WebMCP and How Is It Different from MCP?

WebMCP for UI: Enabling Agents to Use Websites Directly

Brought to you by Sentry!

Is This Just a Chrome Thing? W3C Standards and Open Development

WebMCP Security: Annotations, Hints, and Multi-Layered Defense

Best Use Cases: E-Commerce, Video Editing, and Complex UIs

The WebMCP Challenge: 5,000 Entries and Creative Applications

Headless WebMCP: Running Agents in the Background

Multi-Tab Scenarios: Using WebMCP Across Multiple Sites

WebMCP and Security: Safe Origin Policy and Agent Containment

Performance and Core Web Vitals for the Agentic Web

The Future of Web Monetization: Ads, Commerce, and Agent Payments

Building an Agent Platform: Extensions, Harnesses, and Browser Vendor Roles

Support from Anthropic, Safari, Firefox, and Other Players

Getting Involved: Origin Trial, Community Feedback, and the W3C Spec

Sick Picks + Shameless Plugs

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Show notes

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

Universal Commerce Protocol

x402

Ora

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

Hit us up on Socials!

Syntax: X Instagram Tiktok LinkedIn Threads

Wes: X Instagram Tiktok LinkedIn Threads

Scott: X Instagram Tiktok LinkedIn Threads

Randy: X Instagram YouTube Threads

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