Joost de Valk (@jdevalk) / X

Joost de Valk

10.3K posts

Joost de Valk

@jdevalk

Investor @emiliacapital • Founder @Yoast • Open Source aficionado currently playing with Astro & EmDash • Husband to Marieke • Father of 4 • 🇪🇺🇳🇱🇮🇹️️

Wijchen, Nederland

Joined March 2009

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Joost de Valk
@jdevalk
Jul 28
MCP 2026-07-28 shipped today: no more handshake, no more sessions. That's how static sites already served MCP; the spec just caught up. What changed in my endpoint, why tools/list can now live on the CDN, and how my agent skills now ship over MCP:
MCP 2026-07-28: the spec catches up with the static web · Joost.blog
From joost.blog
Joost de Valk
@jdevalk
Jul 22
For some of the work I’m doing I had to write down where I think websites are headed and what that means for SEO, and since I did, I decided to make a blog post out of it too:
The future of the website · Joost.blog
From joost.blog
Joost de Valk
@jdevalk
Jul 16
This... Is probably the best explanation of what SEOs call "keyword research". Write in the language your customers use. There is the risk of navelgazing in this, so I would add one thing: talk to 100 or so prospective customers that didn't buy your product yet too.
Jason Fried
@jasonfried
Jul 15
Every marketing team should do this simple test. At random, ask 100 of your existing customers to describe your product in their own words. No leading the witness. Then look at how you describe your product on your site. Don’t dismiss obvious differences by telling yourself,
Joost de Valk
@jdevalk
Jul 10
When Dries wrote about License-only versus Stewarded Open Source, I knew I had to write a follow-on to that:
Stewarded open source is not enough: who can cut you off? · Joost.blog
From joost.blog
Joost de Valk
@jdevalk
Jul 3
I wrote about this in the context of hosts, but this is happening everywhere and much more of a problem than people realize: joost.blog/block-the-abus…
JH Scherck
@JHTScherck
Jul 1
Do I know anyone @Zendesk? If so, can someone at ZD explain why their hosted help center blocks Claude with a 403 status code? It makes it harder to have agents figure out how to solve problems with third party products. cc @DanoKwan *please* consider having your team fix this.
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