---
title: "Content-Signal: definition | Agent Ready Crawlers"
description: "Content-Signal: A robots.txt line from the Content Signals Policy that states yes or no for three uses, search, ai-input and ai-train."
canonical: https://agentreadycrawlers.com/glossary/content-signal
site: "Agent Ready Crawlers"
last_updated: 2026-11-04
section: "Glossary"
---

# Content-Signal: definition | Agent Ready Crawlers

> Content-Signal: A robots.txt line from the Content Signals Policy that states yes or no for three uses, search, ai-input and ai-train.

Source: https://agentreadycrawlers.com/glossary/content-signal
Site: Agent Ready Crawlers
Last reviewed: 2026-11-04

Glossary

# Content-Signal

In short

A robots.txt line from the Content Signals Policy that states yes or no for three uses: search, ai-input and ai-train. 6.4 percent of top-10,000 robots.txt files (380 of 5,938) carry a Content-Signal line. Example: Cloudflare's example: "Content-Signal: search=yes, ai-train=no". Related: What Content-Signals changes and robots.txt builder.

## Definition

A robots.txt line from the Content Signals Policy that states yes or no for three uses: search, ai-input and ai-train.

## Sourced example

Cloudflare's example: "Content-Signal: search=yes, ai-train=no". [Source](https://blog.cloudflare.com/content-signals-policy/), read 2026-11-04.

## How it shows up here

6.4 percent of top-10,000 robots.txt files (380 of 5,938) carry a Content-Signal line.

-   [What Content-Signals changes](https://agentreadycrawlers.com/guides/what-content-signals-change/)
-   [robots.txt builder](https://agentreadycrawlers.com/robots-builder/)

Previous: [Browsing agent](https://agentreadycrawlers.com/glossary/browsing-agent/). Next: [Crawl-delay](https://agentreadycrawlers.com/glossary/crawl-delay/). [All 41 terms](https://agentreadycrawlers.com/glossary/).

## Sources

-   [Giving users choice with Cloudflare's new Content Signals Policy](https://blog.cloudflare.com/content-signals-policy/) read 2026-11-04

Last reviewed 2026-11-04