digicert.com: what it tells AI crawlers

On 28 October 2026, digicert.com's robots.txt allowed all of GPTBot, OAI-SearchBot, ClaudeBot, Claude-SearchBot, Google-Extended, PerplexityBot and CCBot; it also published llms.txt.

Last verified 2026-10-29 03:59 UTC (daily run of 2026-10-28). Proof for that day.

Panel
top 1k (Tranco)
robots.txt
ok (HTTP 200) · https://www.digicert.com/robots.txt
unchanged since 2026-10-26 · sha256 a139a54387d10bfd… · view as recorded
The * group
allows applies to every agent without its own group

Per AI bot, 2026-10-28

User agentVerdictHow
GPTBotallowsnamed in its own group
OAI-SearchBotallowsnamed in its own group
ChatGPT-Userallowsnamed in its own group
ClaudeBotallowsnamed in its own group
Claude-SearchBotallowsnamed in its own group
Claude-Userallowsnamed in its own group
PerplexityBotallowsnamed in its own group
Perplexity-Userallowsnamed in its own group
Googlebotallowsthrough the * group
Google-Extendedallowsnamed in its own group
Applebot-Extendedallowsthrough the * group
CCBotallowsthrough the * group
Bytespiderallowsthrough the * group
Meta-ExternalAgentallowsthrough the * group
Amazonbotallowsthrough the * group

Other signals

Publishes /llms.txtyes
Publishes /ai.txtno
Publishes /.well-known/tdmrep.jsonnot observed
Reserves TDM rights (TDMRep file, header or meta)not observed
Declares Content Signals (robots.txt or header)not observed
Says ai-train=no in a Content Signalnot observed
Points to an RSL licence (robots.txt License line or Link header)not observed
Answers with an x402 payment offer (lower bound: only the homepage is probed)not observed
Answers HTTP 402 Payment Required (lower bound: only the homepage is probed)not observed
Sends noai / noimageai directivesnot observed
Refused our fetcher (403 / challenge)no

llms.txt: "DigiCert", 8,395 bytes, 54 links.

robots.txt as recorded sha256 80e2fc4ef681bd44…

User-agent: *
Disallow: /custsupport/
Disallow: /help/ssl_check
Disallow: /offers/
Disallow: /analytics/
Disallow: /reports/
Disallow: /seals/
Disallow: /link/
Disallow: /ppc/
Disallow: /events/summit-2014/
Disallow: /order/discovery/
Disallow: /secure/
Disallow: /services/
Disallow: /events/dcab-2016/
Disallow: /account/sso/
Disallow: /account/saml-guest-request/

User-agent: AdsBot-Google
Allow: /ppc/

Sitemap: https://www.digicert.com/sitemap.xml
Sitemap: https://www.digicert.com/es/sitemap.xml

robots.txt versions

FromThroughStateVersion
2026-10-262026-10-28ok 200a139a54387d1

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.digicert.comok viewallowsallowsunknownallowsallowsunknownallows
2025-09-15 CC-MAIN-2025-38www.digicert.comok viewallowsallowsunknownallowsallowsunknownallows
2024-09-16 CC-MAIN-2024-38www.digicert.comok viewallowsallowsunknownallowsallowsunknownallows
2023-10-02 CC-MAIN-2023-40www.digicert.comok viewallowsallowsunknownallowsallowsunknownallows
2022-10-03 CC-MAIN-2022-40www.digicert.comok viewallowsallowsunknownallowsallowsunknownallows
2021-09-27 CC-MAIN-2021-39www.digicert.comok viewallowsallowsunknownallowsallowsunknownallows
2020-09-28 CC-MAIN-2020-40www.digicert.comok viewallowsallowsunknownallowsallowsunknownallows
2019-09-23 CC-MAIN-2019-39www.digicert.comok viewallowsallowsunknownallowsallowsunknownallows
2018-10-22 CC-MAIN-2018-43www.digicert.comok viewallowsallowsunknownallowsallowsunknownallows
2018-09-24 CC-MAIN-2018-39www.digicert.comok viewallowsallowsunknownallowsallowsunknownallows
2018-07-23 CC-MAIN-2018-30www.digicert.comok viewallowsallowsunknownallowsallowsunknownallows
2018-04-23 CC-MAIN-2018-17www.digicert.comok viewallowsallowsunknownallowsallowsunknownallows
2018-01-29 CC-MAIN-2018-05www.digicert.comok viewallowsallowsunknownallowsallowsunknownallows
2017-10-23 CC-MAIN-2017-43www.digicert.comok viewallowsallowsunknownallowsallowsunknownallows
2017-09-25 CC-MAIN-2017-39www.digicert.comok viewallowsallowsunknownallowsallowsunknownallows
2017-07-24 CC-MAIN-2017-30www.digicert.comok viewallowsallowsunknownallowsallowsunknownallows
2017-04-24 CC-MAIN-2017-17www.digicert.comok viewallowsallowsunknownallowsallowsunknownallows
2017-01-23 CC-MAIN-2017-04www.digicert.comok viewallowsallowsunknownallowsallowsunknownallows
2016-10-03 CC-MAIN-2016-40www.digicert.comok viewallowsallowsunknownallowsallowsunknownallows
2016-09-05 CC-MAIN-2016-36www.digicert.comok viewallowsallowsunknownallowsallowsunknownallows

Evidence

Every daily observation of digicert.com is a leaf in that day's Merkle tree. Proof of the robots.txt line for 2026-10-28: audit path (JSON), day root and OpenTimestamps proof (complete (bitcoin block 973640)).

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