# Allow AI crawlers through to ADN — Agent Delivery Network — ADN

← Back to Help Allow AI crawlers through to ADN
 Pay-per-crawl requires named AI crawlers to reach ADN (you should see x-adn-outcome or HTTP 402 on priced paths). Blocks often happen before ADN — on Vercel Firewall, Netlify, Cloudflare (if in path), or another WAF.
 Diagnose from headers
 Headers Likely layer
 cf-ray , cf-mitigated Cloudflare
 x-vercel-id , x-vercel-mitigated Vercel
 x-nf-request-id Netlify
 403 without ADN headers Generic WAF / host
 Cloudflare (when Cloudflare is in the path)
 Security → Bots / AI Crawl Control: avoid blocking verified AI crawlers on agents.yourdomain.com . Consider a WAF Skip rule for that hostname.
 Vercel
 Project → Firewall / Bot Protection: allow GPTBot, ClaudeBot, and similar on your agents hostname, or ensure agents.* CNAMEs to ADN so Vercel is not the first hop.
 Netlify
 Review access & security rules; exempt agents hostname or priced paths.
 ADN SaaS hostname
 If agents.* is on ADN DNS connect and probes show Cloudflare without ADN headers, contact ADN — the block may be on our SaaS edge, not your Vercel or DNS setup.
 Full guide: customer doc on GitHub .
 Ask ADN