ibm.com: what it tells AI crawlers

On 27 October 2026, ibm.com's robots.txt allowed all of GPTBot, OAI-SearchBot, ClaudeBot, Claude-SearchBot, Google-Extended, PerplexityBot and CCBot.

Last verified 2026-10-28 03:59 UTC (daily run of 2026-10-27). Proof for that day.

Panel

top 1k (Tranco)

robots.txt

ok (HTTP 200) · https://www.ibm.com/robots.txt
unchanged since 2026-10-26 · sha256 8e29d2cf6f21b8d8… · view as recorded

The * group

partial applies to every agent without its own group

Per AI bot, 2026-10-27

Other signals

robots.txt as recorded sha256 d37838d5f1e2fcc5…

# $Id: robots.txt,v 1.3 2011/02/20 23:22:47 krusch Exp $
#
# Robots Exclusion Standard:
# <URL:http://www.robotstxt.org/wc/exclusion.html#robotstxt>
#
# Contact for this site:
# <URL:http://www.ibm.com/webmaster/>
#
# Format:
# User-agent: <agent-string>
# Disallow: <path>
# -----------------------------------------------------------------------------

User-agent: *
Disallow: /link
Disallow: /common/error
Disallow: /rc/
Disallow: /cgi-
Disallow: /www

#

robots.txt versions

Timeline of changes

Reconstructed history (Common Crawl)

From Common Crawl's robots.txt captures: what CCBot was served, one crawl per quarter. A separate series from the daily observations above; a 403 here means Common Crawl was refused, not this ledger.

Evidence

Every daily observation of ibm.com is a leaf in that day's Merkle tree. Proof of the robots.txt line for 2026-10-27: audit path (JSON), day root and OpenTimestamps proof (complete (bitcoin block 973493)).

API: https://infrarabbit.com/crawlers/api/v1/policy/ibm.com