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Baidu

YiyanBot

TrainingNo fetched rangesVerified July 2026

What it is

YiyanBot is a Baidu crawler identity associated with the ERNIE/Yiyan generative AI service. Aiola classifies it as training because it performs automated collection rather than a user-triggered fetch.

In Aiola's taxonomy, Training means scraped for model training or dataset development.

User agent

Look for the match token inside the complete HTTP User-Agent header. Tokens can be spoofed, so use the network checks below for authentication.

Full example User-Agent
YiyanBot
Case-insensitive match token
YiyanBot

Official IP ranges

Baidu has not published official IP ranges that Aiola successfully fetched for YiyanBot. Aiola does not list cloud-provider ranges or community guesses as if they authenticated this crawler.

Verify authenticity

Start with the source IP recorded by your trusted edge or server, not an untrusted forwarded header.

Reverse- and forward-DNS double lookup
host REQUEST_IP
# Confirm the hostname ends in an official suffix
host RETURNED_HOSTNAME
# The forward lookup must return REQUEST_IP

For production checks, test against every current prefix in the vendor feed. Re-fetch feeds regularly: a July 2026 snapshot is evidence of publication, not a permanent firewall list.

Control it with robots.txt

Baidu does not provide crawler documentation that Aiola could confidently verify for this token. The rules below express your preference, but vendor compliance is unconfirmed.

Allow YiyanBot
User-agent: YiyanBot
Allow: /
Block YiyanBot
User-agent: YiyanBot
Disallow: /

No official crawler documentation URL is listed because Aiola could not verify one confidently.

Track it

Aiola tracks this crawler on your site — crawls, pages, trends. See when YiyanBot arrives, which URLs it requests, and how activity changes over time.

Explore Aiola Analytics

FAQ

What is YiyanBot?

YiyanBot is a Baidu crawler identity associated with the ERNIE/Yiyan generative AI service. Aiola classifies it as training because it performs automated collection rather than a user-triggered fetch.

What user-agent token identifies YiyanBot?

Match the case-insensitive token “YiyanBot” in the User-Agent header. A matching header alone does not authenticate the sender.

Can I verify YiyanBot by IP address?

No official YiyanBot CIDR snapshot was successfully fetched for this verification date. Do not treat an arbitrary cloud IP as proof of identity.

Can robots.txt block YiyanBot?

Baidu does not provide crawler documentation that Aiola could confidently verify for this token. The rules below express your preference, but vendor compliance is unconfirmed. Use the specific “YiyanBot” group when you want a rule for this identity without changing rules for every crawler.

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