AI crawlers · Search indexes
Baiduspider
Baiduspider is the search index crawler run by Baidu: indexes pages for Baidu search in China. Its operator documents how to verify it: reverse DNS to baidu.com or baidu.jp, then forward DNS back to the same address. A reverse DNS lookup on the source address must return the operator's domain, and a forward lookup on that name must return the same address.
| User-agent token | Baiduspider |
| Operator | Baidu |
| What it does | indexes pages for Baidu search in China |
| Kind | search index crawler |
| Can a request be verified? | Yes — reverse dns |
| Verification source | reverse DNS to baidu.com or baidu.jp, then forward DNS back to the same address |
| In a CrawlCheck scan | Read from robots.txt; a refusal is scored |
Allow or block it in robots.txt
User-agent: Baiduspider Disallow: /
User-agent: Baiduspider Allow: /
Add a group that names it: "User-agent: Baiduspider" followed by "Disallow: /". A crawler follows only the most specific group that names it, so once a group names Baiduspider, rules under "User-agent: *" no longer apply to it; repeat in that group any Disallow lines you still want.
What blocking it changes
Indirectly. It feeds indexes pages for Baidu search in China. A refusal removes pages from that index, and most AI answer surfaces still draw on search indexes.
What it actually did on crawlcheck.io
| Verified requests | 559 |
| Requests using its name from outside its operator's ranges | 35 (5.9% of claims) |
| robots.txt fetched | 0 times |
| Fetches of paths robots.txt disallows | 0 |
| Observed | 2026-08-13 to 2026-11-12 |
Measured on this site’s own traffic, verified against the operator’s published ranges. Every agent’s record: agent conduct.
See what Baiduspider and every other named agent receive from your own site: run a free scan. The full catalogue is on AI crawlers and as JSON at /ai-crawlers.json.