What is Assaybot?
Assaybot is a web crawler operated by Index Exchange, an advertising technology company. The bot gathers intelligence about web content and inventory for programmatic advertising marketplace purposes. You can set up Agent Analytics to see when Assaybot visits your website.
Overview
| Operated By | Index Exchange |
| Source | Official Website |
| Expected To Follow Robots.txt | Yes |
| Insights Last Updated | September 17, 2026 |
Do you operate this agent? Contact us to suggest an update.
Category
Expected Behavior
Assaybot'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.
Assaybot's User Agent
| User Agent | Mozilla/5.0 (compatible; Assaybot/0.1; +http://www.indexexchange.dev/bot.html) |
How To Block Assaybot With Robots.txt
Add this rule to your robots.txt file to block Assaybot 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: Assaybot # https://knownagents.com/agents/assaybot
Disallow: /Insights for Assaybot
As of September 17, 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 Blocked Percentage
Country of Origin
Top Visited Website Categories
The types of websites most frequently visited by Assaybot.
Frequently Asked Questions
Should I Block Assaybot?
Confirm Assaybot'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, 6% of the top websites we track currently have robots.txt rules for Assaybot.
Does Assaybot Follow Robots.txt Rules?
Yes. Assaybot is expected to follow robots.txt rules, so a disallow rule is the appropriate first step. Automatic Robots.txt can add and maintain that rule, while Agent Analytics lets you verify whether Assaybot respects it.
Does Assaybot Access Private Content?
No special access. Assaybot can read publicly available pages but cannot bypass authentication. Assume anything you publish openly may be collected.
How Can I Tell if Assaybot Is Visiting My Website?
Agent Analytics tracks Assaybot visits in real time. You can also check your server logs for requests whose user-agent string contains "Assaybot". Traffic may range from repeated requests to the same pages to broader crawls or one-off fetches. Because Assaybot does not publish a verification method, any client can claim its identity and a log match is only a clue.
Why Is Assaybot Visiting My Website?
Index Exchange 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.