gnc.com

scanned 9/10/2026, 9:39:26 PM · took 116s · Health SupplementsGemini · gemini-2.5-flash · HTTP · Target gnc.comA measurement at one moment, not a verdict · Methodology

55/ 100

DNeeds work

AI agents can access gnc.com but fail to complete any tasks using the site's own content, relying entirely on external search results.

The one fix worth most right nowGet the fix files →

Remove challenge and login walls+655 → 61

All of them together: 92 (A)

Projected from the audit record. After fixing, re-run the task or re-measure to confirm.

Agents successfully connected to the gnc.com homepage without being blocked. However, the site lacks essential AI-readable navigation files like /llms.txt and a standard /sitemap.xml. Because agents could not discover internal pathways, they failed to complete any of the ten tested tasks using only the site's resources. In nine out of ten tasks, agents did not cite gnc.com URLs at all, meaning users will receive third-party information about your products. Furthermore, agents encountered frequent errors when guessing standard URLs for pricing, shipping, and stock, forcing them to rely heavily on external search engines.

What works

The homepage is accessible to AI agents (HTTP 200) without bot-blocking mechanisms.
A standard robots.txt file is present and accessible.

What to fix

For each item: its current state, why it matters, how to fix it and how to check. The same content comes as files you can hand straight to whoever does the work.

Putting the items together…

Fix files

Files generated from this audit. Paste them in, or hand them to a coding agent. Have someone review them before they go live.

Building the fix files…

Detailed results

The results behind the score, and the measurement record.

Discovery

3/20

Access

17/30

Navigation

30/30

Completion

5/20

1.Can an agent get into the site at all?90/100

HTTPREDIRECT

Evidence

homepage HTTP 200
redirect hops: 1

2.Does the site let agents through rather than block them?20/100

ROBOTSBOT

Evidence

robots.txt contains Disallow rules
A CAPTCHA is holding the content back: PerimeterX
First byte after 558ms
http is not upgraded to https

3.Does it publish machine-readable guidance?15/100

LLMS.TXTSITEMAPROBOTS

Evidence

/llms.txt — absent (HTTP 404)
/llms-full.txt — absent (HTTP 404)
/sitemap.xml — absent (HTTP 307)
/sitemap-index.xml — absent (HTTP 307)
/sitemap_index.xml — absent (HTTP 307)
/robots.txt — present

4.Is the raw HTML readable without running JavaScript?100/100

HTMLSSR

Evidence

458 links in the raw HTML

5.Does the site answer pricing itself?15/100

PRICINGFAILED

Evidence

outcome success · verdict failed
the final answer cited no URL from this site
site-guided navigation 0%
2xx rate 0%
done_small_detour

6.Does the site answer shipping and returns itself?15/100

SHIPPINGFAILED

Evidence

outcome success · verdict failed
the final answer cited no URL from this site
site-guided navigation 0%
2xx rate 0%
done_small_detour

7.Can an agent tell whether an item is available?15/100

STOCKFAILED

Evidence

outcome success · verdict failed
the final answer cited no URL from this site
site-guided navigation 0%
2xx rate 0%
done_small_detour

8.Does the site guide an agent to support?25/100

SUPPORTFAILED

Evidence

outcome success · verdict failed
the final answer cited no URL from this site
site-guided navigation 0%
2xx rate 100%
done_big_detour

9.Can an agent reach a human contact?25/100

CONTACTFAILED

Evidence

outcome success · verdict failed
the final answer cited no URL from this site
site-guided navigation 0%
2xx rate 100%
done_big_detour

10.Does it state the refund or cancellation rule with a deadline?25/100

POLICYFAILED

Evidence

outcome success · verdict failed
the final answer cited no URL from this site
site-guided navigation 0%
2xx rate 100%
done_big_detour

11.Can an agent compare two plans or products?15/100

COMPAREFAILED

Evidence

outcome success · verdict failed
the final answer cited no URL from this site
site-guided navigation 0%
2xx rate 0%
done_small_detour

12.Can an agent reach the latest notice, with its date?25/100

LATESTFAILED

Evidence

outcome success · verdict failed
the final answer cited no URL from this site
site-guided navigation 0%
2xx rate 100%
done_big_detour

13.Can an agent find branch or store locations?55/100

LOCATIONSPARTIAL

Evidence

outcome success · verdict partial
the final answer cited this site
site-guided navigation 0%
2xx rate 100%
done_big_detour

14.Does the site guide an agent through signing up?15/100

SIGNUPFAILED

Evidence

outcome success · verdict failed
the final answer cited no URL from this site
site-guided navigation 0%
2xx rate 0%
done_small_detour

WebMCP — what the site declares about itself

Not checked

This audit ran with the WebMCP check switched off. That does not mean there are no tools — it means we did not look. Turn on "Check WebMCP" when re-auditing.

Act-stage check (nothing submitted)

Checks whether an agent could fill in the forms and press the buttons, up to the point of pressing. No form was submitted, nothing added to a cart, nothing paid. Report only; not scored.

The act stage was not checked in this audit.

Per-task results

Task	Verdict	Own-site share	Request success	Followed guidance	Cited own site
find pricing	Failed	0%	0%	0%	No
shipping & returns	Failed	0%	0%	0%	No
is it available	Failed	0%	0%	0%	No
get support	Failed	0%	100%	0%	No
contact a human	Failed	0%	100%	0%	No
refund policy	Failed	0%	100%	0%	No
compare two options	Failed	0%	0%	0%	No
latest notice	Failed	0%	100%	0%	No
find a branch	Partial	100%	100%	0%	Yes
create an account	Failed	0%	0%	0%	No

About this report

Measured: 9/10/2026, 9:39:26 PM GMT+9
Engine: Gemini · gemini-2.5-flash · HTTP

This is what AI agents could do on the site at the time above, measured by actually using it. It is not a verdict on the site or the company, and the result can change when the site does.

Methodology →About AOO-Bot and opting out →