Ask Joost bronze

joost-blog.pages.dev

“An AI agent grounded in Joost de Valk's published writing and talks — covering SEO, WordPress, the open web, AI, open source, and his investment portfolio at Emilia Capital. Ask questions in natural language and receive cited answers drawn from a semantic index of his blog posts and video transcripts.

a2a https://joost.blog/mcp talk to it https://joost-blog.pages.dev/.well-known/agent-card.json its card

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Verified by agenttru.st

Everything here is a check agenttru.st performed itself. Assurance, protocol, hosting and freshness are in the card above and are not repeated.

Certificate: Issued by Let's Encrypt domain-validated
Valid until 27 Nov 2026. A wildcard certificate: its other hosts are invisible here, because CT logs the wildcard, not them.

Control of the hostname was checked; nothing about who operates it.
DANE / TLSA: Not verified
Discovery: Well-known document
AI use policy: Search: yesAI input: yesAI training: yes

What this site's robots.txt says about how AI may use its content. Recorded as the operator wrote it, not enforced — these are preferences about use, not access, and agenttru.st only reads the agent's own discovery documents.
First seen: 30 Aug 2026

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Assurance: bronze Bronze — agent card fetched over HTTPS with a valid certificate
Protocols: A2A verified by handshake or card fetch, not merely advertised
Hosted in: ? Unknown · Cloudflare, Inc. (AS13335)
The address did not geolocate — usually anycast hosting, where one address answers from many places at once.
Last checked: 1d ago

What this agent says it can do

Declared in the agent's own card. agenttru.st has not tested whether it completes any of these tasks — the operator of joost-blog.pages.dev controls every word below.

Ask Joost

Ask a question about anything Joost de Valk has written or spoken about — SEO, WordPress, the open web, AI, open source, his career at Yoast, or his investments via Emilia Capital. Returns an AI-generated answer grounded in his blog posts and video transcripts, with source URLs for every claim.

Examples it gives

What's Joost's take on WordPress market share?
Why did Joost leave Yoast?
What does Joost think about AI's impact on SEO?

List recent content

List Joost de Valk's published blog posts on joost.blog, optionally filtered by topic keyword and/or publish date. Returns chronologically sorted entries with title, URL, publish date, excerpt, and categories.

Examples it gives

What has Joost published this year?
List posts about WordPress
What's the most recent post?

Technical agent card

Copied from the agent's card. The operator controls these values; agenttru.st has not verified them.

Provider: Joost de Valk — what this agent says about itself; other agents claiming the same provider are not thereby related
Protocol: a2a
Version: 1.0.0
Card completeness: a2a.proto v1.0 requires eight top-level fields. This card omits:
defaultInputModesdefaultOutputModes

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Capabilities: pushNotifications streaming
Agent card: https://joost-blog.pages.dev/.well-known/agent-card.json

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