Fix: AI user-fetch User-Agent can reach the homepage
Web-audit fix skill for the
agent-ua-reachablecheck (Bot & crawl policy, SHOULD).
Goal
Let on-demand user-fetchers GET / with Accept / and receive 2xx, not a challenge page.
Fix
Allow AI user-fetch clients such as ChatGPT-User to GET / with Accept: */* and receive a 2xx response whose body is not an obvious bot-challenge interstitial. This is reachability, not content type: serving HTML is fine. Blocklists that 403 these UAs, or challenge pages that say "Just a moment", fail the check.
Resources
Copy-paste prompt
Paste this into your coding agent. Your audit adds what it observed for this check:
Verify
Re-run the audit at https://anc.dev/audit or call the audit_website MCP tool; the agent-ua-reachable check should report pass.