---
title: "Content Signals defined | Agent Ready Checklist"
description: "Content Signals: A robots.txt directive declaring how content may be used after access: ai-train, search and ai-input, each yes or no."
canonical: https://agentreadychecklist.com/glossary/content-signals
site: "Agent Ready Checklist"
last_updated: 2026-11-05
section: "Glossary"
---

# Content Signals defined | Agent Ready Checklist

> Content Signals: A robots.txt directive declaring how content may be used after access: ai-train, search and ai-input, each yes or no.

Source: https://agentreadychecklist.com/glossary/content-signals
Site: Agent Ready Checklist
Last reviewed: 2026-11-05
Agent endpoints: https://agentreadychecklist.com/llms.txt (index), https://agentreadychecklist.com/openapi.json (API), https://agentreadychecklist.com/mcp (MCP server), https://agentreadychecklist.com/ask (search)
Access: https://agentreadychecklist.com/auth.md (no key). Pricing: https://agentreadychecklist.com/pricing.md (free).

# Content Signals

A robots.txt directive declaring how content may be used after access: ai-train, search and ai-input, each yes or no. A stated preference, not an access control. Example: User-agent: \* Content-Signal: ai-train=no, search=yes, ai-input=yes. contentsignals.org, the reference site for Content Signals, served an empty <div id="root"> shell with no body text to a plain fetch on 2026-11-04.

## Definition

A robots.txt directive declaring how content may be used after access: ai-train, search and ai-input, each yes or no. A stated preference, not an access control.

## Example

```text
User-agent: *
Content-Signal: ai-train=no, search=yes, ai-input=yes
```

## Nearby terms

-   [robots.txt](https://agentreadychecklist.com/glossary/robots-txt/)Plain-text file at the site root that tells compliant crawlers which paths to skip, standardised as RFC 9309.

## Asked about it

### Which Cloudflare checks have no AgentReady requirement?

Content Signals, markdown negotiation, OAuth discovery as a standalone file, Agent Skills discovery, and items such as DNS-AID, Auth.md and Personal Agent Protocol. Pay per crawl is a Cloudflare feature but not listed as a scanner check on 2026-11-04.

## Sources

-   [blog.cloudflare.com/agent-readiness/](https://blog.cloudflare.com/agent-readiness/)read 2026-11-04
-   [contentsignals.org](https://contentsignals.org/)read 2026-11-04
-   [isitagentready.com](https://isitagentready.com/)read 2026-11-04

Last reviewed 2026-11-05. AgentReady v2.0, read 2026-11-04.