Published on 2025-08-07T06:18:08Z

SemanticScholarBot

SemanticScholarBot is a specialized web crawler from the Allen Institute for Artificial Intelligence (AI2). Its purpose is to discover and index academic and scientific literature for the Semantic Scholar search engine. The bot's activity is a key part of a non-profit initiative to make scientific knowledge more accessible. For websites hosting academic content, being indexed can increase the visibility and impact of the research.

What is SemanticScholarBot?

SemanticScholarBot is the web crawler for Semantic Scholar, an AI-enhanced academic search engine from the non-profit Allen Institute for Artificial Intelligence (AI2). The bot's function is to index scholarly literature, systematically navigating the web to identify, extract, and archive academic content, especially research publications in PDF form. It uses advanced techniques like OCR and NLP to extract critical information, such as citations and methodologies. The bot identifies itself with the user-agent string Mozilla/5.0 (compatible) SemanticScholarBot (+https://www.semanticscholar.org/crawler).

Why is SemanticScholarBot crawling my site?

SemanticScholarBot is visiting your website because it hosts or links to academic content that is valuable for researchers. The bot specifically targets scholarly materials like research papers and conference proceedings, prioritizing academic domains, university websites, and open-access repositories. The frequency of its visits depends on the volume of new academic content on your site. The crawling is considered a legitimate and authorized activity as part of a non-profit effort to make scientific knowledge more accessible.

What is the purpose of SemanticScholarBot?

The purpose of SemanticScholarBot is to collect the data that powers the Semantic Scholar search engine. This service helps researchers overcome information overload by indexing millions of academic papers and making them discoverable through AI-enhanced features like semantic search and automated paper summarization. For website owners who host academic content, having your publications indexed by this bot can increase their visibility within the academic community, which can lead to more citations and a broader research impact.

How do I block SemanticScholarBot?

To prevent SemanticScholarBot from accessing your website, you can add a specific disallow rule to your robots.txt file. This is the standard method for managing crawler access.

Add the following lines to your robots.txt file to block this bot:

User-agent: SemanticScholarBot
Disallow: /

How to verify the authenticity of the user-agent operated by Allen Institute for Artificial Intelligence?

Reverse IP lookup technique

To verify user-agent authenticity, you can use host linux command two times with the IP address of the requester.
  1. > host IPAddressOfRequest
    This command returns the reverse lookup hostname (e.g., 4.4.8.8.in-addr.arpa.).
  2. > host ReverseDNSFromTheOutputOfFirstRequest
If the output matches the original IP address and the domain is associated with a trusted operator (e.g., Allen Institute for Artificial Intelligence), the user-agent can be considered legitimate.

IP list lookup technique

Some operators provide a public list of IP addresses used by their crawlers. This list can be cross-referenced to verify a user-agent's authenticity. However, both operators and website owners may find it challenging to maintain an up-to-date list, so use this method with caution and in conjunction with other verification techniques.