UCP Checker
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UCP status report

justfab.com

justfab.com responded, but its profile did not pass schema validation.

Invalid
37/100
UCP Score · grade D →
5 problems · 5 passed
HTTP 200 Release none Checked 18 Oct, 08:02 UTC

Findings

5 passed · 5 problems
To fix first
Problem
Serve profile as application/json
The profile URL did not return parseable JSON. How to fix →
Also worth fixing
To fix
Publish Organization schema (JSON-LD) on the homepage
No Organization-typed JSON-LD detected on your homepage. How to fix →
To fix
Publish a /llms.txt brand brief
No /llms.txt file detected at the root of your domain. How to fix →
To fix
Publish a sitemap.xml
No sitemap.xml detected at the root of your domain. How to fix →
To fix
Add Open Graph meta tags to the homepage
OG tags missing or incomplete on your homepage. How to fix →
Passed
5 OK
HTTPS, AI bot access, Mobile viewport meta, Public keys published, No validation warnings
Show all 5
  • HTTPS: Profile URL uses https://
  • AI bot access: robots.txt allows /.well-known/ucp
  • Mobile viewport meta: <meta name="viewport"> present
  • Public keys published: Keys published at the top level
  • No validation warnings: No outstanding validation issues
Check trace

How justfab.com answered our check

The five ways an agent can reach this store, what each one met, and every request we made.

1 of 5 open
4 requests · 432 ms at the store · public requests only
  1. 01Hosting ↗
    Finding the profile
    Open
  2. 02Identity Linking ↗
    Acting for the buyer
    Not offered
  3. 03Embedded ↗
    In the buyer's browser
    Not offered
  4. 04Services ↗
    Calling its services
    None
  5. 05continue_url ↗
    Sending the buyer to the website
    Not declared
UCP Checkerpublic requests
  • 2 requestsFinding the profile/.well-known/ucp · 200
  • read from profileActing for the buyernot declared
  • read from profileIn the buyer's browsernot declared
  • not calledCalling its servicesnone declared
  • read from profileSending to the websitenot declared
  • 2 requestsOutside UCPhomepage · /llms.txt
Open
01 · Finding the profile2 requests
Served at /.well-known/ucp with 200 OK, 319.1 KB. robots.txt allows /.well-known/ucp.
Not offered
02 · Acting for the buyerread from profile
The profile doesn't declare identity linking, so an agent can't act for a signed-in buyer.
Not offered
03 · In the buyer's browserread from profile
No Embedded service is declared.
None
04 · Calling its servicesnot called
No services are declared.
Not declared
05 · Sending the buyer to the websiteread from profile
No permalink declared. Whether error replies carry a continue_url shows only in an agent run.
  1. 01 PROFILEGET /.well-known/ucp → 200, 319.1 KB of JSON432 ms
  2. 01 PROFILEGET /robots.txt → allows /.well-known/ucp–
  3. 01 PROFILEProfile did not pass schema validation: Response is not a valid JSON objectlocal
  4. OUTSIDE UCPGET / → 200, no Organization schema found–
  5. OUTSIDE UCPGET /llms.txt → 200, not found–
UCP profile as served 3.9 KB · 1 lines 
<!DOCTYPE html><html lang="en-US" class="__variable_70b8b3 __variable_098b60 __variable_c1e5b8"><head><meta charSet="utf-8"/><meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no"/><link rel="stylesheet" href="/_next/static/css/e04d1607ab142ab3.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/d2e5a655528ecac1.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/12d2fec87feb8b63.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/86315edfe504d304.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/031d7a1e09d3509b.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/f48c06af01fa0020.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/7f2cd6582cf5679b.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/b0d951263b6c9e88.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/27398867b55adb53.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/2351908c04dbee27.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/6a6d018e51b96fce.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/3fd952043e36e3f7.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/10293f35cad39419.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/b857e47ac10e38f6.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/90304149b42cf761.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/ef46db3751d8e999.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/492a7a9bd5a030f5.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/91775530d5774680.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/8c1ad925564b95bc.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/2c85ab42ef9d7d7d.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/da4e29eff7d4292e.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/df5cf4faae311e03.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/875c52dc9f58f0d3.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/c657c19dbf76f7ed.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/44a3f0a450fda7b6.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/d076b27a8c97b384.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/5d8a348ae0d0d956.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/6f9d0944de26bf72.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/5f8b34d69148b3a0.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/8a5b9560c8be5da3.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/c42ef5ef5595822d.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/2c97089bcf2138ed.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/64e0b12c1ee0cdd5.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/b89f2cb3082896b3.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/776c2a5d350cba18.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/b70a458122819d84.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/0df8c72f8c3ef58a.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/5e05dcd70abb0a47.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/43e0fdfeedd7ecdb.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/e6935c9dc9802107.css" data-precedence="next"/><link rel="stylesheet" href="/_next/static/css/ec4e...
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Questions

Why is justfab.com's profile invalid?
We found a UCP profile, but it failed schema validation against the official spec. The findings on this page list what failed — usually missing required fields, wrong data types, or version mismatches. Agents reject profiles that don't validate, so this needs fixing before justfab.com is agent-ready.
How can justfab.com fix this?
Run the profile through our UCP Validator — it shows line-by-line schema deviations and how to fix each one. Most invalid profiles are quick fixes: a missing field, a typo, or an outdated spec version.
Does this mean justfab.com is broken for shoppers?
No — the regular website still works fine for human customers. Only AI agents that strictly validate the profile will refuse to use the UCP integration. The store just isn't agent-ready until the validation issues are resolved.
How was this UCP report for justfab.com generated?
Our crawler fetches justfab.com/.well-known/ucp directly, parses the profile against the official UCP JSON schema, checks robots.txt for its rules for AI crawlers, and runs payment-handler validation. No manual review, no opinions — just what the profile actually says. The check ran 1 day ago.
How do I get a newer result for justfab.com?
This page shows the stored result of our last check and when it was observed. To run a new check, use Check again on this page.
Why does this status matter?
Universal Commerce Protocol is an open standard that lets a UCP agent find out what a store sells, build a cart and check out through a published contract instead of reading web pages. A valid UCP profile is how a store declares that support.