Matt King
Head of Content
Matt writes about the agentic web: the standards AI agents use to read and act on websites, and what site owners should do about them.
Articles by Matt King
We checked 141 well-known storefronts for UCP. Almost every ready one was ready by accident.
A third of the stores we checked publish a UCP manifest, and 46 of the 48 score exactly the same grade. That is not convergence. That is one platform shipping readiness by default while everyone else has not started.
August 8, 2026
Every UCP validator I could find, and what each one actually checks
Six months after UCP launched there are at least five ways to validate a manifest. They do not check the same things. Here is what each one covers, where the gaps are, and what to run before you trust a green tick.
August 1, 2026
WebMCP is in Chrome. Now what?
The Web Model Context Protocol shipped as an early preview in Chrome, with a DevTools panel to go with it. What actually changed, and the one thing worth doing about it this month.
July 25, 2026
llms.txt, honestly: what it does and what it does not do
Nearly two years after the proposal, llms.txt is widely published and nobody major has committed to reading it. Both halves of that sentence matter. Here is the honest case for spending twenty minutes on one anyway.
July 18, 2026
Schema stopped being just for Google
JSON-LD used to be a rich-results play. Now it is one of the few things on a page an AI agent can read without guessing. Same markup, new audience, and the audience is growing.
July 11, 2026