fbcdn.net: what it tells AI crawlers

On 27 October 2026, fbcdn.net's robots.txt fully blocked 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://fbcdn.net/robots.txt
unchanged since 2026-10-26 · sha256 8155e929427b274a… · view as recorded
The * group: blocks applies to every agent without its own group

Per AI bot, 2026-10-27

User agent	Verdict	How
GPTBot	blocks	named in its own group
OAI-SearchBot	blocks	through the * group
ChatGPT-User	blocks	through the * group
ClaudeBot	blocks	named in its own group
Claude-SearchBot	blocks	through the * group
Claude-User	blocks	through the * group
PerplexityBot	blocks	named in its own group
Perplexity-User	blocks	through the * group
Googlebot	blocks	named in its own group
Google-Extended	blocks	named in its own group
Applebot-Extended	blocks	named in its own group
CCBot	blocks	through the * group
Bytespider	blocks	through the * group
Meta-ExternalAgent	blocks	through the * group
Amazonbot	blocks	named in its own group
Applebot	blocks	named in its own group
Brightbot	blocks	named in its own group
facebookexternalhit	blocks	named in its own group
PetalBot	blocks	named in its own group
Scrapy	blocks	named in its own group
YaK	blocks	named in its own group

Other signals

Publishes /llms.txt	not observed
Publishes /ai.txt	not observed
Publishes /.well-known/tdmrep.json	not 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 Signal	not 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 directives	not observed
Refused our fetcher (403 / challenge)	no

robots.txt as recorded sha256 116801c45441856f…

# Notice: Collection of data on Facebook through automated means is
# prohibited unless you have express written permission from Facebook
# and may only be conducted for the limited purpose contained in said
# permission.
# All authorized user-agents listed on this page must comply with Meta’s
# Automated Data Collection Terms available at:
# https://www.facebook.com/legal/automated_data_collection_terms
User-agent: Amazonbot
Disallow: /

User-agent: Applebot-Extended
Disallow: /

User-agent: Brightbot
Disallow: /

User-agent: ClaudeBot
Disallow: /

User-agent: Google-Extended
Disallow: /

User-agent: GPTBot
Disallow: /

User-agent: PerplexityBot
Disallow: /

User-agent: PetalBot
Disallow: /

User-agent: uptimerobot
Disallow: /

User-agent: viberbot
Disallow: /

User-agent: YaK
Disallow: /

User-agent: Yandex
Disallow: /

User-agent: Yeti
Disallow: /

User-agent: Applebot
Disallow: /
Allow: /map_tile.php
Allow: /security/hsts-pixel.gif
Allow: /static_map.php

User-agent: Bingbot
Disallow: /
Allow: /map_tile.php
Allow: /security/hsts-pixel.gif
Allow: /static_map.php

User-agent: Discordbot
Disallow: /
Allow: /map_tile.php
Allow: /security/hsts-pixel.gif
Allow: /static_map.php

User-agent: DuckDuckBot
Disallow: /
Allow: /map_tile.php
Allow: /security/hsts-pixel.gif
Allow: /static_map.php

User-agent: facebookexternalhit
Disallow: /
Allow: /map_tile.php
Allow: /security/hsts-pixel.gif
Allow: /static_map.php

User-agent: Googlebot
Disallow: /
Allow: /map_tile.php
Allow: /security/hsts-pixel.gif
Allow: /static_map.php

User-agent: Googlebot-Image
Disallow: /
Disallow: /map_tile.php
Disallow: /static_map.php
Allow: /map_tile.php
Allow: /security/hsts-pixel.gif
Allow: /static_map.php

User-agent: Googlebot-Video
Disallow: /
Allow: /map_tile.php
Allow: /security/hsts-pixel.gif
Allow: /static_map.php

User-agent: Googlebot-News
Disallow: /
Allow: /map_tile.php
Allow: /security/hsts-pixel.gif
Allow: /static_map.php

User-agent: Google-InspectionTool
Disallow: /
Allow: /map_tile.php
Allow: /security/hsts-pixel.gif
Allow: /static_map.php

User-agent: LinkedInBot
Disallow: /
Allow: /map_tile.php
Allow: /security/hsts-pixel.gif
Allow: /static_map.php

User-agent: msnbot
Disallow: /
Allow: /map_tile.php
Allow: /security/hsts-pixel.gif
Allow: /static_map.php

User-agent: Pinterestbot
Disallow: /
Allow: /map_tile.php
Allow: /security/hsts-pixel.gif
Allow: /static_map.php

User-agent: Screaming Frog SEO Spider
Disallow: /
Allow: /map_tile.php
Allow: /security/hsts-pixel.gif
Allow: /static_map.php

User-agent: seznambot
Disallow: /
Allow: /map_tile.php
Allow: /security/hsts-pixel.gif
Allow: /static_map.php

User-agent: Slurp
Disallow: /
Allow: /map_tile.php
Allow: /security/hsts-pixel.gif
Allow: /static_map.php

User-agent: teoma
Disallow: /
Allow: /map_tile.php
Allow: /security/hsts-pixel.gif
Allow: /static_map.php

User-agent: TelegramBot
Disallow: /
Allow: /map_tile.php
Allow: /security/hsts-pixel.gif
Allow: /static_map.php

User-agent: Twitterbot
Disallow: /
Allow: /map_tile.php
Allow: /security/hsts-pixel.gif
Allow: /static_map.php

User-agent: *
Disallow: /

robots.txt versions

From	Through	State	Version
2026-10-26	2026-10-27	ok 200	`8155e929427b`

Timeline of changes

Date	What 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.

Crawl	Host	State	GPTBot	OAI-SearchBot	ChatGPT-User	ClaudeBot	Claude-SearchBot	Claude-User	PerplexityBot
2025-09-15 CC-MAIN-2025-38	fbcdn.net	ok view	blocks	blocks	unknown	blocks	blocks	unknown	blocks
2023-10-02 CC-MAIN-2023-40	fbcdn.net	ok view	blocks	blocks	unknown	blocks	blocks	unknown	blocks
2022-10-03 CC-MAIN-2022-40	fbcdn.net	ok view	blocks	blocks	unknown	blocks	blocks	unknown	blocks
2021-09-27 CC-MAIN-2021-39	fbcdn.net	ok view	blocks	blocks	unknown	blocks	blocks	unknown	blocks
2019-09-23 CC-MAIN-2019-39	fbcdn.net	ok view	blocks	blocks	unknown	blocks	blocks	unknown	blocks
2018-09-24 CC-MAIN-2018-39	fbcdn.net	ok view	blocks	blocks	unknown	blocks	blocks	unknown	blocks
2017-09-25 CC-MAIN-2017-39	fbcdn.net	redirect-only	unknown	unknown	unknown	unknown	unknown	unknown	unknown
2017-07-24 CC-MAIN-2017-30	fbcdn.net	redirect-only	unknown	unknown	unknown	unknown	unknown	unknown	unknown
2017-04-24 CC-MAIN-2017-17	fbcdn.net	redirect-only	unknown	unknown	unknown	unknown	unknown	unknown	unknown
2017-01-23 CC-MAIN-2017-04	fbcdn.net	redirect-only	unknown	unknown	unknown	unknown	unknown	unknown	unknown
2016-10-03 CC-MAIN-2016-40	fbcdn.net	redirect-only	unknown	unknown	unknown	unknown	unknown	unknown	unknown
2016-09-05 CC-MAIN-2016-36	fbcdn.net	redirect-only	unknown	unknown	unknown	unknown	unknown	unknown	unknown

Evidence

Every daily observation of fbcdn.net 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/fbcdn.net