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

User agentVerdictHow
GPTBotpartialthrough the * group
OAI-SearchBotpartialthrough the * group
ChatGPT-Userpartialthrough the * group
ClaudeBotpartialthrough the * group
Claude-SearchBotpartialthrough the * group
Claude-Userpartialthrough the * group
PerplexityBotpartialthrough the * group
Perplexity-Userpartialthrough the * group
Googlebotpartialthrough the * group
Google-Extendedpartialthrough the * group
Applebot-Extendedpartialthrough the * group
CCBotpartialthrough the * group
Bytespiderpartialthrough the * group
Meta-ExternalAgentpartialthrough the * group
Amazonbotpartialthrough the * group

Other signals

Publishes /llms.txtno
Publishes /ai.txtno
Publishes /.well-known/tdmrep.jsonno
Reserves TDM rights (TDMRep file, header or meta)no
Declares Content Signals (robots.txt or header)no
Says ai-train=no in a Content Signalno
Points to an RSL licence (robots.txt License line or Link header)no
Answers with an x402 payment offer (lower bound: only the homepage is probed)no
Answers HTTP 402 Payment Required (lower bound: only the homepage is probed)no
Sends noai / noimageai directivesno
Refused our fetcher (403 / challenge)no

robots.txt versions

FromThroughStateVersion
2026-10-262026-10-27ok 2008e29d2cf6f21

Timeline of changes

DateWhat changed
No changes since the first observation (2026-10-26).

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.

CrawlHostStateGPTBotOAI-SearchBotChatGPT-UserClaudeBotClaude-SearchBotClaude-UserPerplexityBot
2026-09-21 CC-MAIN-2026-39www.ibm.comok viewpartialpartialunknownpartialpartialunknownpartial
2025-09-15 CC-MAIN-2025-38www.ibm.comok viewpartialpartialunknownpartialpartialunknownpartial
2024-09-16 CC-MAIN-2024-38www.ibm.comok viewpartialpartialunknownpartialpartialunknownpartial
2023-10-02 CC-MAIN-2023-40www.ibm.comok viewpartialpartialunknownpartialpartialunknownpartial
2022-10-03 CC-MAIN-2022-40www.ibm.comok viewpartialpartialunknownpartialpartialunknownpartial
2021-09-27 CC-MAIN-2021-39www.ibm.comok viewpartialpartialunknownpartialpartialunknownpartial
2020-09-28 CC-MAIN-2020-40ibm.comok viewallowsallowsunknownallowsallowsunknownallows
2019-09-23 CC-MAIN-2019-39ibm.comok viewallowsallowsunknownallowsallowsunknownallows
2018-09-24 CC-MAIN-2018-39ibm.comok viewallowsallowsunknownallowsallowsunknownallows
2017-09-25 CC-MAIN-2017-39ibm.comok viewallowsallowsunknownallowsallowsunknownallows
2017-07-24 CC-MAIN-2017-30ibm.comok viewallowsallowsunknownallowsallowsunknownallows
2017-04-24 CC-MAIN-2017-17ibm.comok viewallowsallowsunknownallowsallowsunknownallows
2017-01-23 CC-MAIN-2017-04ibm.comok viewallowsallowsunknownallowsallowsunknownallows
2016-10-03 CC-MAIN-2016-40ibm.comok viewallowsallowsunknownallowsallowsunknownallows
2016-09-05 CC-MAIN-2016-36ibm.comok viewallowsallowsunknownallowsallowsunknownallows

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