What is Marginalia Search?
Marginalia Search is a search engine crawler operated by Marginalia. You can set up Agent Analytics to see when Marginalia Search visits your website.
Category
| Operated By | Marginalia |
| Triggered By | Automated crawl |
| Used for AI Model Training | Not expected |
| Affects AI Chat & Search Visibility | Possibly |
| Expected To Follow Robots.txt | Yes |
Why Is Marginalia Search Visiting My Website?
Marginalia Search is adding new or changed pages to its search index. It may have discovered your site through links, a sitemap, or direct submission.
Should I Block Marginalia Search?
No, unless you want to remove your pages from that search engine. Marginalia Search supplies its index, so blocking it can eliminate your visibility and organic traffic there. Nearly every website should allow this category. For context, 7% of the top websites we track currently have robots.txt rules for Marginalia Search.
How Do I Block Marginalia Search Using Robots.txt?
Add this rule to your robots.txt file to block Marginalia Search from accessing your website, or use Automatic Robots.txt to block all search engine crawlers at once. You can customize which pages are blocked by swapping out / for a different path.
User-agent: Marginalia Search # https://knownagents.com/agents/marginalia-search
Disallow: /Insights for Marginalia Search
As of October 30, 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
Marginalia Search Traffic
Frequently Asked Questions
What Traffic Patterns Should I Expect From Marginalia Search?
Marginalia Search follows an algorithmic schedule shaped by your site's popularity, update cadence, and domain authority. It generally spreads requests across recurring crawl passes, throttles itself to limit server load, and respects crawl rules more reliably than most other bots.
Does Marginalia Search Follow Robots.txt Rules?
Marginalia Search 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 Marginalia Search respects it.
Is Marginalia Search Used for AI Model Training?
Not ordinarily. Marginalia Search is not categorized as an AI training scraper or data provider, so AI model training is not its expected purpose.
Does Blocking Marginalia Search Affect AI Search or Citations?
Blocking Marginalia Search can remove your pages from the search engine it supplies. That may also affect AI products that rely on the same index, but it does not directly control unrelated AI search services.
Does Marginalia Search Access Private Content?
No special access. Marginalia Search can reach only content available to anonymous visitors and does not sign in. Make sure sensitive content is not public by mistake.
How Can I Verify a Request From Marginalia Search?
Agent Analytics tracks Marginalia Search visits in real time. You can also check your server logs for requests whose user-agent string contains "Marginalia Search". Look for recurring passes that revisit changed pages and discover new ones. Because Marginalia Search does not publish a verification method, any client can claim its identity and a log match is only a clue.
How Is Marginalia Search Different From Other Marginalia Agents?
Marginalia operates separate agents for different purposes, so each agent should be evaluated and controlled independently.
- search.marginalia.nu: search.marginalia.nu is a web crawler for Marginalia Search, a noncommercial search engine that focuses on indexing old websites, personal websites, and blogs. The search…