What is IAS crawler?
ias_crawler from Integral Ad Science performs digital ad verification, brand safety monitoring, and fraud detection across digital advertising channels to ensure quality media measurement. You can set up Agent Analytics to see when IAS crawler visits your website.
Category
| Example User Agent | IAS Crawler (ias_crawler; http://integralads.com/site-indexing-policy/) |
| Operated By | Integral Ad Science |
| Source | Official Website |
| Triggered By | Operator-configured crawl |
| Used for AI Model Training | Possibly |
| Affects AI Chat & Search Visibility | Not directly |
| Expected To Follow Robots.txt | Yes |
Why Is IAS crawler Visiting My Website?
Integral Ad Science or one of its clients may be gathering competitive intelligence, measuring advertisements, or evaluating content for brand safety. The pages requested reflect the underlying objective.
Should I Block IAS crawler?
Confirm IAS crawler's purpose before blocking it. Intelligence gatherers may collect competitive research, measure advertisements, or evaluate pages for brand safety. Weigh any benefit against sharing business or page-level data with its operator or clients. For context, 7% of the top websites we track currently have robots.txt rules for IAS crawler.
How Do I Block IAS crawler Using Robots.txt?
Add this rule to your robots.txt file to block IAS crawler from accessing your website, or use Automatic Robots.txt to block all intelligence gatherers at once. You can customize which pages are blocked by swapping out / for a different path.
User-agent: IAS crawler # https://knownagents.com/agents/ias-crawler
Disallow: /Insights for IAS crawler
As of October 29, 2026, this data reflects agent visits measured across thousands of websites using Agent Analytics, combined with daily scans of the top 1000 websites and their robots.txt files.
Robots.txt Compliance
Country of Origin
Robots.txt Blocked Percentage
Frequently Asked Questions
What Traffic Patterns Should I Expect From IAS crawler?
IAS crawler's traffic pattern depends on the intelligence being collected. It may revisit specific pages on a schedule, crawl broader sections of your site, or appear only when information is requested. Its request scope and frequency reflect the underlying objective.
Does IAS crawler Follow Robots.txt Rules?
IAS crawler is expected to follow robots.txt rules, so a disallow rule is the appropriate first step if you want to block it. Automatic Robots.txt can add and maintain that rule, while Agent Analytics lets you verify whether IAS crawler respects it.
Is IAS crawler Used for AI Model Training?
Possibly, but its category does not establish that purpose. IAS crawler's operator may use or provide the collected content for AI training or for unrelated automated tasks.
Does Blocking IAS crawler Affect AI Search or Citations?
Not directly. IAS crawler's expected purpose is not to supply an AI search index or retrieve pages for AI-generated answers.
Does IAS crawler Access Private Content?
No special access. IAS crawler can read publicly available pages but cannot bypass authentication. Assume anything you publish openly may be collected.
How Can I Verify a Request From IAS crawler?
Agent Analytics tracks IAS crawler visits in real time. You can also check your server logs for requests whose user-agent string contains "IAS crawler". Traffic may range from repeated requests to the same pages to broader crawls or one-off fetches. Because IAS crawler does not publish a verification method, any client can claim its identity and a log match is only a clue.
How Is IAS crawler Different From Other Integral Ad Science Agents?
Integral Ad Science operates separate agents for different purposes, so each agent should be evaluated and controlled independently.