ia_archiver and the Internet Archive crawler
ia_archiver is a long-standing user-agent token associated with crawling for the Internet Archive's Wayback Machine and related collections. The Internet Archive operates archival crawlers that fetch public pages to preserve snapshots over time. The token has historic ties to the Alexa crawler that fed early Archive collections, so log entries may show ia_archiver or archive.org-related agents depending on the crawl source.
What this means
ia_archiver is a user-agent token historically used by crawling that fed the Internet Archive, including the Alexa crawl that supplied early Wayback Machine snapshots. The Internet Archive preserves public web pages so they can be viewed later through the Wayback Machine.
Because the archival ecosystem has shifted over the years, you may see ia_archiver, archive.org_bot, or other archive.org-identifying agents in logs. They share the goal of capturing a snapshot rather than building a search index.
How it identifies itself
Historic Internet Archive crawling has been seen under the ia_archiver token, with later archival crawling identifying via archive.org URLs. Match on the documented token pattern rather than an exact version, which changes over time.
As with any user-agent, the string is a claim and can be copied. Where authenticity matters, corroborate with the source network and behaviour rather than trusting the string alone. The exact current token set and IP ranges are not fully published, so this entry is marked partially verified.
- Historic token: ia_archiver
- Later archival agents identify via an archive.org URL
- Purpose: snapshot preservation, not search ranking
robots.txt considerations
The Internet Archive has historically respected robots.txt for live crawling decisions, though its handling of robots.txt for already-archived material has evolved. To ask archival crawlers not to fetch your pages, target the relevant token in robots.txt.
Remember robots.txt is a request honoured by compliant crawlers, not an access control. It cannot prevent a non-compliant client from fetching, and it does not retroactively remove existing snapshots.
How it appears in analytics and logs
A request carrying ia_archiver or an archive.org-identifying agent is an archival fetch intended to preserve a snapshot, not to rank your site in a search engine. Treat it as bot traffic and as preservation coverage, not as audience or as SEO indexing.
Diagnostic use case
Recognise archival crawl traffic from the Internet Archive in logs, distinguish it from search-engine indexing, and decide whether to allow snapshot preservation of your pages.
What WebmasterID can help detect
WebmasterID classifies archival crawler hits server-side as bot traffic and shows which pages archival agents reached, so preservation crawling does not inflate human analytics.
Common mistakes
- Assuming ia_archiver is a search engine that affects rankings — it is archival preservation.
- Expecting a robots.txt rule to remove pages already archived.
- Counting archival crawl hits as human page views.
Privacy and accuracy notes
Archive crawler identification uses only the request user-agent. No visitor identity is involved. WebmasterID records the archival fetch as a bot event, separate from human analytics.
Related pages
- Archival crawlers overview
Archival crawlers — led by the Internet Archive's Wayback Machine crawling — fetch public pages to preserve point-in-time snapshots for research, journalism, and the historical record. They are not search crawlers: they capture how a page looked, not rank it. Understanding the difference keeps robots.txt and analytics decisions sensible, since archiving and indexing serve different goals.
- archive.org_bot — Internet Archive web crawler
archive.org_bot is a user-agent associated with Internet Archive crawling that fetches public web pages for preservation in collections such as the Wayback Machine. It is an archival agent, distinct from search-engine indexing crawlers, and identifies via an archive.org URL in its user-agent. Operators see it when their public pages are captured for long-term snapshots.
- Search crawlers vs SEO crawlers
Search-engine crawlers like Googlebot and Bingbot build the indexes that determine search visibility. Third-party SEO crawlers like AhrefsBot and SemrushBot feed analysis tools and do not affect rankings directly. Distinguishing them matters for crawl-budget reasoning and for deciding what to allow or limit.
- Bot intelligence
Deterministic categorisation of crawlers, archival bots, and automation.
Sources and verification notes
- Internet Archive — Wayback MachineArchive of preserved public web snapshots.
- Internet Archive — about / FAQBackground on crawling and snapshot preservation; exact current token set not exhaustively published.
Last reviewed 2026-06-24. Facts are checked against primary/official sources where available; uncertain specifics are marked “Data not yet verified” rather than guessed.