Very poor0.0%

AWCS

What the AWCS is, and how it is measured

The figures the index is made of, with their own series: a technology whose index is flat can still have moved on one dimension.

Read

What Read measures

Lighthouse builds the accessibility tree an agent would traverse and scores the page pass or fail. The denominator is only the pages the audit could evaluate: a notApplicable or an error is excluded rather than counted as a failure, and the fraction that could be evaluated is published beside it as the coverage.

n=1 · coverage 100.0% · margin ±53.00 pp.

53% of the score
Read on its full scale

Very poor0.0%

Guide

What Guide measures

The llms-txt audit passing: a file is served AND Lighthouse considers it valid. The denominator is every sampled page, so this is a fraction of the whole web and not of the sites that have a file. This is the figure the index uses, because a broken file does not guide an agent.

n=1 · coverage 100.0% · margin ±53.00 pp.

27% of the score
Guide on its full scale

Very poor0.0%

Act

What Act measures

A count, not a percentage: how many sampled sites register WebMCP tools that an agent can call. It is the audit that defines the Act dimension — the other two WebMCP audits measure how good those tools are, not whether they exist.

n=1 · coverage 100.0% · margin ±53.00 pp.

20% of the score
Act on its full scale

Very poor0.0%

Reachable

What Reachable measures

Read from the robots.txt of the sampled sites: of the AI agents we track, how many are NOT disallowed. Gradual and not a yes or no — turning away one agent out of seventeen is not the same as turning away all of them. A site with no robots.txt blocks nobody, so it counts as fully reachable: that is a measurement, not a gap. This is the only figure that MULTIPLIES the index instead of adding to it, because it is a precondition: if an agent cannot fetch the page, nothing else about the page matters. One caveat we would rather state than hide: a blanket Disallow under User-agent: * is not counted, because the corpus-wide measurement cannot see it either, and we would rather be consistent than clever.

n=1 · coverage 100.0% · margin ±53.00 pp.

multiplies the rest
Reachable on its full scale

Excellent100.0%

Against the rest of Web servers

The 24 technologies in this category with a published index, and the web overall for scale. CherryPy is the highlighted bar.

AOLserver
AOLserver: 53.3%
53.3%
Centminmod
Centminmod: 53.3%
53.3%
Microsoft HTTPAPI
Microsoft HTTPAPI: 53.3%
53.3%
Apache Tomcat
Apache Tomcat: 36.8%
36.8%
Apache APISIX
Apache APISIX: 35.6%
35.6%
Tengine
Tengine: 27.8%
27.8%
Caddy
Caddy: 22.8%
22.8%
Kestrel
Kestrel: 22.6%
22.6%
Cowboy
Cowboy: 21.3%
21.3%
All sites
All sites: 19.9%
19.9%
IIS
IIS: 18.4%
18.4%
Amazon EC2
Amazon EC2: 17.8%
17.8%
Phusion Passenger
Phusion Passenger: 16.7%
16.7%
LiteSpeed
LiteSpeed: 15.4%
15.4%
Apache Traffic Server
Apache Traffic Server: 15.1%
15.1%
OpenGSE
OpenGSE: 15.1%
15.1%
OpenResty
OpenResty: 13.9%
13.9%
Apache HTTP Server
Apache HTTP Server: 13.7%
13.7%
gunicorn
gunicorn: 13.3%
13.3%
Angie
Angie: 0.0%
0.0%
CherryPy
CherryPy: 0.0%
0.0%
Daphne
Daphne: 0.0%
0.0%
Oracle WebLogic Server
Oracle WebLogic Server: 0.0%
0.0%
TwistedWeb
TwistedWeb: 0.0%
0.0%
Zope
Zope: 0.0%
0.0%
00.250.500.751.0
Every Web servers technology the census can publish, against the web overall (19.9%). The scale is always 0–1.

What else we measure here

50.0%
Google's category score

Google's category score

Sample
n=1
Coverage
100.0%
0.0%
Sites with an AI crawler policy

Sites with an AI crawler policy

Sample
n=1
Coverage
100.0%
100.0%
Agents that can reach the site

Agents that can reach the site

Sample
n=1
Coverage
100.0%
0.0%
Pages an agent can parse

Pages an agent can parse

Sample
n=1
Coverage
100.0%
0.0%
Sites serving an llms.txt

Sites serving an llms.txt

Sample
n=1
Coverage
100.0%
0.0%
Sites with a valid llms.txt

Sites with a valid llms.txt

Sample
n=1
Coverage
100.0%
0
Sites exposing tools

Sites exposing tools

Sample
n=1
Coverage
100.0%

How this was measured