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. Agent Analytics can track when it visits your website.
Overview
| Operated By | Integral Ad Science |
| Source | Official Website |
| Expected To Follow Robots.txt | Yes |
| Insights Last Updated | July 12, 2026 |
Category
Expected Behavior
IAS crawler visits with a shopping list. Expect focused, repeated requests to the pages its clients monitor, like pricing, product listings, and announcements, on schedules ranging from hourly to weekly. Sites outside a client's watchlist may never see it at all.
IAS crawler's User Agent
| User Agent | IAS Crawler (ias_crawler; http://integralads.com/site-indexing-policy/) |
How To Block IAS crawler With Robots.txt
Add this rule to your robots.txt file to block IAS crawler from accessing your entire 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: /Global Insights for IAS crawler
As of July 12, 2026, this data reflects agent visits measured across thousands of websites using Agent Analytics, combined with daily scans of the world's top 1000 websites and their robots.txt files.
Robots.txt Blocked Percentage
Country of Origin
Robots.txt Blocking Trend
0% of top websites block IAS crawler in their robots.txt files.
Overall Intelligence Gatherer Traffic
4.3% of all web traffic came from intelligence gatherers.
Top Visited Website Categories
The types of websites most frequently visited by IAS crawler.
Frequently Asked Questions
Should I Block IAS crawler?
Decide who benefits. IAS crawler collects pricing, product, and brand data for its operator's clients, and those clients can include your competitors. Allow it if visibility in market research matters to you. Block it if you would rather not hand competitors structured data about your business. Almost none of the top websites we track have robots.txt rules for IAS crawler right now.
Does IAS crawler Follow Robots.txt Rules?
Yes. IAS crawler is expected to follow robots.txt rules, so a disallow rule is the right first move. Automatic Robots.txt adds and maintains that rule for you, and Agent Analytics confirms IAS crawler actually follows it.
Does IAS crawler Access Private Content?
Public business information is the target. Pricing pages, product listings, and announcements are what its clients pay for. IAS crawler has no special access, but assume everything you publish openly gets collected.
Why Is IAS crawler Visiting My Website?
A client of Integral Ad Science is monitoring your market, your brand, or you specifically. Expect IAS crawler's visits to concentrate on pages with business value, like pricing and product pages.
How Can I Tell if IAS crawler Is Visiting My Website?
Agent Analytics tracks IAS crawler visits in real time alongside every other known AI agent, crawler, and scraper. You can also check your server logs for requests whose user agent string contains "IAS crawler". Look for repeated visits to pricing, product, and news pages. Keep in mind that IAS crawler doesn't publish a verification method, so any client can claim its user agent string and a log match is a hint rather than proof.