tensorust/ai-crawler-access-policies-sample

AI Crawler Access Policies: free sample (Tensorust LLC)

Which of the top 10,000 sites block which AI crawler, read from their own robots.txt.

Headline: Of the Tranco top 10,000 domains with a readable robots.txt, 1,511 (23.1%) fully block at least one AI crawler and 1,144 (17.5%) block OpenAI's GPTBot; in the top 1,000 it is 21.5%. nytimes.com (rank 160) names GPTBot and blocks 20 of the 22 AI crawlers tracked, while 1,075 domains publish an llms.txt inviting them in.

This repository is a free teaser, not the dataset. It holds 25 example rows and a summary table with no names in it. The full file has 10,000 rows and is sold by Tensorust LLC: https://tensorust.com/datasets/ai-crawler-access-policies/.

Files here

file	what it is
sample.csv	25 rows of the full file (the same sample shown on tensorust.com)
summary_by_gptbot_policy.csv	row counts by GPTBot policy across the full file, no entity names (groups with fewer than 3 rows are folded into "Other")

Summary by GPTBot policy (largest groups)

GPTBot policy	rows
allowed	5,020
partial	3,836
blocked	1,144
TOTAL	10,000

Full table: summary_by_gptbot_policy.csv.

What the full file has

• 10,000 rows
• Key fields: snapshot_date, rank, domain, robots_status, has_robots, llms_txt, content_signal, bot_, named_, ai_bots_blocked
• Parquet and CSV, a README with sources, method and limits, and the build script
• Free 25-row sample (no personal contact data)

Coverage: Tranco top 10,000 domains, 22 AI crawler tokens, snapshot 2026-11-06; 6,535 domains with a readable robots.txt. Snapshot fetched Nov 6 2026

Columns in the full file

column	meaning
snapshot_date	Date the robots.txt was fetched
rank	Tranco rank on that date
domain	Domain
robots_status	HTTP status of /robots.txt
has_robots	A text robots.txt came back
llms_txt	A plain-text or markdown /llms.txt exists
content_signal	Content-Signal value declared in robots.txt, if any
bot_<crawler>	blocked, partial or allowed for each of 22 AI crawlers
named_<crawler>	robots.txt has a user-agent group naming that crawler
ai_bots_blocked	Count of the 22 crawlers fully blocked
blocks_all_by_default	The * group blocks the whole site

Get the full file

tier	price	includes
Current snapshot	$750	All 10,000 domains with the status of every one of the 22 crawlers, named-rule flags, llms.txt and Content-Signal, plus the raw robots.txt responses. CSV and Parquet.
Monthly change feed	$450 a month	A fresh snapshot each month with changes.csv: every site that started or stopped blocking each crawler, and new llms.txt files.
Yearly license, top 100,000	$9,000 a year	Snapshots extended to the Tranco top 100,000, refreshed monthly, with crawler tokens you name added. Internal use for data partnership, crawler and licensing teams.

Email mattbusel@tensorust.com with the tier and a billing contact, and we will send a proper invoice (ACH or card). The file is delivered once the invoice is paid. Details and the live sample: https://tensorust.com/datasets/ai-crawler-access-policies/. All datasets: https://tensorust.com/datasets/

Method and limits

Fetch each domain's robots.txt (https, then www.), parse user-agent groups, resolve each of 22 crawler tokens to its named group or the * group; Disallow: / without Allow: / is blocked, any other Disallow is partial. llms.txt fetched only where robots.txt allows it and counted only as plain text or markdown. Each run is a dated snapshot; changes.csv diffs the latest two.

Not enforcement (CDN and firewall blocks are not seen; 3,465 domains gave no readable robots.txt), not licensing status, not page-level meta robots or TDM files, and some ranked domains are CDN or API hosts rather than websites.

Sources

• Tranco top 1M list, https://tranco-list.eu/top-1m.csv.zip
• Each domain's own /robots.txt and /llms.txt, fetched Nov 6 2026
• Crawler user-agent tokens published by OpenAI, Anthropic, Google, Apple, Perplexity, Common Crawl and the other operators

License

The sample and summary here are free to view, analyze and cite with attribution to "Tensorust LLC, https://tensorust.com/datasets/ai-crawler-access-policies/". The full dataset is licensed separately per tier. No resale or redistribution of Tensorust data without a written license.

Tensorust LLC, Tuckahoe NY. mattbusel@tensorust.com | https://tensorust.com