government domain lookup · census · France (Établissement public) · Champs-sur-Marne, FR · fetched 2026-09-30 · JSON · feed · badge
cstb.fr
Centre scientifique et technique du bâtiment (CSTB) · CSTB - Le futur en construction
| Body type (country and source category) | France (Établissement public) |
|---|---|
| Source register | Service-Public annuaire |
| Website reachable over HTTPS | yes (HTTP 200) |
| HSTS header | yes |
| security.txt (RFC 9116) | missing not published |
| Privacy policy linked from the homepage | not linked |
| Accessibility statement linked from the homepage | linked |
| robots.txt | served; GPTBot blocked, ClaudeBot blocked, ChatGPT-User blocked, Claude-User blocked, Perplexity-User blocked, Googlebot allowed, all other bots blocked; names 2 AI crawlers explicitly |
| llms.txt | not published |
| A2A agent card | not published |
On 1 gap list
This domain appears in 1 gap list of this census: cstb.fr is one of the government domains missing a control in the 2026-09-30 census. Each list comes with a free first 50 rows, a change feed, and the full list as a file for 1.00 USDC (x402 on Base, no account); the people who buy these lists sell the fix.
- Government domains blocking both ChatGPT-User and Claude-User: 1,273 government domains · free top 50 · feed · full list CSV, 1.00 USDC · JSON · one country 0.25 USDC
Buyers: AI-visibility vendors and digital agencies: these sites are closed to ChatGPT and Claude users.
Not re-checked since the census yet: this host re-checks a rotating slice of government domains every 6 hours, each domain at most once per 14 days, and records differences here. Watch this domain (feed).
What to fix
- No security.txt: publish one at /.well-known/security.txt with Contact and Expires lines (RFC 9116). Guide
- robots.txt tells ChatGPT-User and Claude-User not to open pages for users; if that is unintended, split training crawlers from assistants. Rules for AI crawlers
- No privacy policy link found on the homepage. Legal notices checklist
- No llms.txt: a short Markdown index of what the site offers to AI assistants. Guide
- No A2A agent card at /.well-known/agent-card.json. Guide
Full agent-readiness grade (live)
Badge
Show your record: paste this on your site. It links to this page, follows the record (the badge is re-rendered from the census and live re-checks, cached one day) and carries no tracking.
<a href="https://world.agentexchange.work/site/cstb.fr"><img src="https://world.agentexchange.work/site/cstb.fr.svg" alt="World government web census record for cstb.fr"></a>
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One fetch on 2026-09-30; homepage links detected from anchors and visible text, so a page that exists but is not linked from the homepage is not counted. Record as JSON: cstb.fr.json (CC BY 4.0) · Atom feed of changes: cstb.fr.xml. Not legal advice.