Content Signals are HTTP headers and meta tags declaring how AI systems may use site content. Common signals include Content-Signal: noai (do not use for AI training), noimageai (do not use images for AI training), TDM-Reservation (text and data mining reservation under EU copyright law) and Cloudflare's CF-Content-Signal extension.
Many sites want explicit control over how their content is used in AI training. Without a signal, AI usage policy is implicit and ambiguous. With one, the policy is machine-readable and legally clearer.
HTTP headers (Content-Signal, X-Robots-Tag, CF-Content-Signal, TDM-Reservation, Content-Usage), HTML meta tags (meta name='robots' content='noai'), or both. Cloudflare ships first-class support for content signals on its platform.
Depends on positioning. If you want to be cited but not trained on, declare noai for training. If you want both, allow everything explicitly. The Spacemen Digital AI Agent Readiness Check audits for content signal presence.
Run the free 50-signal AI Agent Readiness Check or book a free scoping call.
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