UCP status report

happyzoo.cz

Q: What is a UCP profile?

The JSON file a store publishes at /.well-known/ucp to tell UCP agents which services it offers, how to call them and how it takes payment. The spec calls it the business profile. happyzoo.cz's is 1.5 KB, written for UCP 2026-08-25. What goes in a UCP profile.

Q: How was happyzoo.cz checked?

With public requests on 7 Nov 2026: we read /.well-known/ucp and robots.txt, validated the profile against UCP 2026-08-25, checked that its spec and schema links resolve. No sign-in and no purchase. How we check.

Verified

happyzoo.cz publishes a valid UCP profile. The checks below list what is still worth adding.

ShoptetRESTHTTP 200 in 131 msrelease 2026-08-25

UCP Score 86/100 grade A · ready for UCP agents To fix 5 nothing breaks the spec

Passed 10 checks

Checked 7 Nov 03:52 UTC · signed public requests

Findings

10 passed · 5 to fix · 2 notes

Discovery

To fix

The profile has no ETag or Last-Modified header

Spec level: SHOULD.

To fix

Your store lives on www.happyzoo.cz; happyzoo.cz only redirects to it

How we decided: happyzoo.cz forwards its homepage to www.happyzoo.cz; your homepage names www.happyzoo.cz as its canonical address; and your UCP profile is served directly at www.happyzoo.cz/.well-known/ucp. An agent given happyzoo.cz instead gets a redirect, and the spec tells agents not to follow one, so it stops there. Serve /.well-known/ucp directly on happyzoo.cz too if agents may use it.

HTTPS

https

Profile URL uses https://

https

UCP profile reachable

/.well-known/ucp

HTTP 200

/.well-known/ucp

AI bot access

robots.txt

robots.txt allows /.well-known/ucp

robots.txt

UCP profile

To fix

Cryptographic message signing is not yet enabled

keys

Your UCP profile lists no public keys, so cryptographic message signing is not yet enabled for this store. HTTPS already confirms your store's identity; signing adds a further layer for checkout, payment and webhook messages.

keys

Profile passes schema validation

ucp

No structural errors

ucp

Protocol version present and well-formed

ucp.version

Version: 2026-08-25

ucp.version

Services

Note

Confirm checkout-link redirect strategy

payment_handlers is present but empty — agents will not be able to complete purchases via tokenized payment flow. If this store uses checkout-link redirects, this is expected.

Capabilities declared

capabilities

3 of 6 capability families detected: Checkout, Cart Management, Catalog. A family counts once however many namespaces or extensions declare it.

capabilities

Checkout capability

shopping.checkout

dev.ucp.shopping.checkout detected

shopping.checkout

Transports declared

services

REST

services

Outside UCP

To fix

Publish Organization schema (JSON-LD) on the homepage

JSON-LD

No Organization-typed JSON-LD detected on your homepage.

JSON-LD

To fix

Fill in your /llms.txt brand brief

/llms.txt

Your /llms.txt answers, but the file is empty.

/llms.txt

Note

/sitemap.xml didn't answer, so it wasn't checked

Our request for /sitemap.xml got no answer on this check (it timed out or did not connect), so we couldn't check the file. Not counted against the score; we try again on the next check.

Open Graph tags

og: meta

og:title and og:type/url present

og: meta

Mobile viewport meta

meta viewport

meta viewport

Check trace

How happyzoo.cz 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
11 requests over 5 connections · 7 of 10 compressed · 6.19 s at the store + 2.17 s network · signed requests · How it fetches ›

01Hosting ↗

Finding the profile

Open
02Identity Linking ↗

Acting for the buyer

Not offered
03Embedded ↗

In the buyer's browser

Not offered
04Services ↗

Calling its services

Declared
05continue_url ↗

Sending the buyer to the website

Not declared

UCP CheckerUCPCheckerBot/1.0

Signed · Web Bot Auth
key K_DlV2MybP…

How to verify us ↗

Finding the profile/.well-known/ucp · 200
1. GET /robots.txt301 Moved Permanently336 ms
2. GET www.happyzoo.cz/robots.txt200 OK410 ms
3. GET /.well-known/ucp301 Moved Permanently95 ms
4. GET www.happyzoo.cz/.well-known/ucp200 OK130 ms
5. GET www.happyzoo.cz/robots.txt200 OK106 ms
6. GET www.happyzoo.cz/.well-known/ucp200 OK131 ms
read from profileActing for the buyernot declared
read from profileIn the buyer's browsernot declared
not calledCalling its servicesREST · declared
read from profileSending to the websitenot declared
Outside UCPhomepage · /llms.txt
1. GET /301 Moved Permanently99 ms
2. GET www.happyzoo.cz/200 OK433 ms
3. GET www.happyzoo.cz/llms.txt200 OK634 ms
4. GET www.happyzoo.cz/200 OK974 ms
5. GET www.happyzoo.cz/sitemap.xml200 OK5,003 ms

Open

01 · Finding the profile6 requests

Served at www.happyzoo.cz/.well-known/ucp with 200 OK, 1.5 KB. happyzoo.cz only redirects to it. 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.

Declared

04 · Calling its servicesnot called

The REST service is declared; not called by this check.

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.

01 · Finding the profile6 requests · 2 × 301 Moved Permanently · 4 × 200 OK4,937 ms

GET /robots.txt 301 Moved Permanently → www.happyzoo.cz/robots.txt 336 ms

Redirected to https://www.happyzoo.cz/robots.txt.

DNS 0 ms
Connect 97 ms
TLS 142 ms
Wait 96 ms
Download 0 ms

URL: https://happyzoo.cz/robots.txt
Server: 185.64.219.37
Sent user-agent: UCPCheckerBot/1.0 (+https://ucpchecker.com/methodology)
Sent accept: text/plain
Sent accept-encoding: gzip, deflate, br, zstd
Sent signature-agent: "https://ucpchecker.com"
Sent signature: Web Bot Auth (RFC 9421)
Got server: openresty
Got content-type: text/html
Got location: https://www.happyzoo.cz/robots.txt

GET www.happyzoo.cz/robots.txt 200 OK 1.1 KB · text/plain 410 ms

Answered.

DNS 7 ms
Connect 95 ms
TLS 209 ms
Wait 98 ms
Download 0 ms

URL: https://www.happyzoo.cz/robots.txt
Server: 185.184.254.10
Sent user-agent: UCPCheckerBot/1.0 (+https://ucpchecker.com/methodology)
Sent accept: text/plain
Sent accept-encoding: gzip, deflate, br, zstd
Sent signature-agent: "https://ucpchecker.com"
Sent signature: Web Bot Auth (RFC 9421)
Got server: openresty
Got content-type: text/plain; charset=utf-8
Got content-encoding: br

GET /.well-known/ucp 301 Moved Permanently → www.happyzoo.cz/.well-known/ucp 95 ms

Redirected to https://www.happyzoo.cz/.well-known/ucp.

DNS 0 ms
Wait 94 ms
Download 0 ms

URL: https://happyzoo.cz/.well-known/ucp
Server: 185.64.219.37
Sent user-agent: UCPCheckerBot/1.0 (+https://ucpchecker.com/methodology)
Sent accept: application/json
Sent accept-encoding: gzip, deflate, br, zstd
Sent signature-agent: "https://ucpchecker.com"
Sent signature: Web Bot Auth (RFC 9421)
Got server: openresty
Got content-type: text/html
Got location: https://www.happyzoo.cz/.well-known/ucp

GET www.happyzoo.cz/.well-known/ucp 200 OK 1.5 KB · application/json 130 ms

Answered.

DNS 0 ms
Wait 129 ms
Download 0 ms

URL: https://www.happyzoo.cz/.well-known/ucp
Server: 185.184.254.10
Sent user-agent: UCPCheckerBot/1.0 (+https://ucpchecker.com/methodology)
Sent accept: application/json
Sent accept-encoding: gzip, deflate, br, zstd
Sent signature-agent: "https://ucpchecker.com"
Sent signature: Web Bot Auth (RFC 9421)
Got server: openresty
Got content-type: application/json
Got content-encoding: br
Got cache-control: public, max-age=300

GET www.happyzoo.cz/robots.txt 200 OK 1.1 KB · text/plain 106 ms

Answered.

DNS 0 ms
Wait 105 ms
Download 0 ms

URL: https://www.happyzoo.cz/robots.txt
Server: 185.184.254.10
Sent user-agent: UCPCheckerBot/1.0 (+https://ucpchecker.com/methodology)
Sent accept: text/plain
Sent accept-encoding: gzip, deflate, br, zstd
Sent signature-agent: "https://ucpchecker.com"
Sent signature: Web Bot Auth (RFC 9421)
Got server: openresty
Got content-type: text/plain; charset=utf-8
Got content-encoding: br

GET www.happyzoo.cz/.well-known/ucp 200 OK 1.5 KB · application/json 131 ms

Answered.

DNS 0 ms
Wait 130 ms
Download 0 ms

URL: https://www.happyzoo.cz/.well-known/ucp
Server: 185.184.254.10
Sent user-agent: UCPCheckerBot/1.0 (+https://ucpchecker.com/methodology)
Sent accept: application/json
Sent accept-encoding: gzip, deflate, br, zstd
Sent signature-agent: "https://ucpchecker.com"
Sent signature: Web Bot Auth (RFC 9421)
Got server: openresty
Got content-type: application/json
Got content-encoding: br
Got cache-control: public, max-age=300

Outside UCP · its other files5 requests · 301 Moved Permanently · 4 × 200 OK5,640 ms

GET / 301 Moved Permanently → www.happyzoo.cz/ 99 ms

Redirected to https://www.happyzoo.cz/.

DNS 0 ms
Wait 99 ms
Download 0 ms

URL: https://happyzoo.cz/
Server: 185.64.219.37
Sent user-agent: UCPCheckerBot/1.0 (+https://ucpchecker.com/methodology)
Sent accept: text/html
Sent accept-encoding: gzip, deflate, br, zstd
Sent signature-agent: "https://ucpchecker.com"
Sent signature: Web Bot Auth (RFC 9421)
Got server: openresty
Got content-type: text/html
Got location: https://www.happyzoo.cz/

GET www.happyzoo.cz/ 200 OK 703.1 KB · text/html 433 ms

Answered.

DNS 0 ms
Wait 221 ms
Download 211 ms

URL: https://www.happyzoo.cz/
Server: 185.184.254.10
Sent user-agent: UCPCheckerBot/1.0 (+https://ucpchecker.com/methodology)
Sent accept: text/html
Sent accept-encoding: gzip, deflate, br, zstd
Sent signature-agent: "https://ucpchecker.com"
Sent signature: Web Bot Auth (RFC 9421)
Got server: openresty
Got content-type: text/html; charset=utf-8
Got content-encoding: gzip
Got cache-control: no-store, no-cache, must-revalidate

GET www.happyzoo.cz/llms.txt 200 OK 0 B · text/plain 634 ms

Answered.

DNS 0 ms
Connect 205 ms
TLS 333 ms
Wait 95 ms
Download 0 ms

URL: https://www.happyzoo.cz/llms.txt
Server: 185.184.254.10
Sent user-agent: UCPCheckerBot/1.0 (+https://ucpchecker.com/methodology)
Sent accept: text/plain
Sent accept-encoding: gzip, deflate, br, zstd
Sent signature-agent: "https://ucpchecker.com"
Sent signature: Web Bot Auth (RFC 9421)
Got server: openresty
Got content-type: text/plain; charset=utf-8

GET www.happyzoo.cz/ 200 OK 701.4 KB · text/html 974 ms

Answered.

DNS 0 ms
Connect 94 ms
TLS 431 ms
Wait 227 ms
Download 221 ms

URL: https://www.happyzoo.cz/
Server: 185.184.254.10
Sent user-agent: UCPCheckerBot/1.0 (+https://ucpchecker.com/methodology)
Sent accept-encoding: gzip, deflate, br, zstd
Sent signature-agent: "https://ucpchecker.com"
Sent signature: Web Bot Auth (RFC 9421)
Got server: openresty
Got content-type: text/html; charset=utf-8
Got content-encoding: gzip
Got cache-control: no-store, no-cache, must-revalidate

GET www.happyzoo.cz/sitemap.xml 200 OK 42,496.0 KB · text/xml 5,003 ms

Answered.

DNS 0 ms
Connect 334 ms
TLS 215 ms
Wait 871 ms
Download 3,582 ms

URL: https://www.happyzoo.cz/sitemap.xml
Server: 185.184.254.10
Sent user-agent: UCPCheckerBot/1.0 (+https://ucpchecker.com/methodology)
Sent accept: application/xml,text/xml
Sent accept-encoding: gzip, deflate, br, zstd
Sent signature-agent: "https://ucpchecker.com"
Sent signature: Web Bot Auth (RFC 9421)
Got server: openresty
Got content-type: text/xml;charset=UTF-8
Got content-encoding: br
Got cache-control: no-store, no-cache, must-revalidate

01 PROFILEValid against the 2026-08-25 schema; no keys published

How agents reach this store. happyzoo.cz's UCP profile (2026-08-25) declares one transport for dev.ucp.shopping: REST. One panel per transport, in the spec's words.

Capabilities

5 declared · all at 2026-08-25

Cart dev.ucp.shopping.cart

REST

Checkout dev.ucp.shopping.checkout

REST

Fulfillmentextension dev.ucp.shopping.fulfillment

REST

Catalog Lookup dev.ucp.shopping.catalog.lookup

REST

Catalog Search dev.ucp.shopping.catalog.search

REST

REST

12 operations the spec defines · 0 called

Endpointhttps://www.happyzoo.cz/ucp/v1

The operations the UCP spec defines for each capability in the profile, appended to the endpoint. REST has no list call, so we can only say what our check called.

Catalog searchdev.ucp.shopping.catalog.search

POST/catalog/searchDeclared, not called

Catalog lookupdev.ucp.shopping.catalog.lookup

Not part of our public check.

POST/catalog/lookupDeclared, not called

POST/catalog/productDeclared, not called

Cartdev.ucp.shopping.cart

We don't call these: they change state.

POST/cartsDeclared, not called

GET/carts/{id}Declared, not called

PUT/carts/{id}Declared, not called

POST/carts/{id}/cancelDeclared, not called

Checkoutdev.ucp.shopping.checkout

We don't call these: they change state.

POST/checkout-sessionsDeclared, not called

GET/checkout-sessions/{id}Declared, not called

PUT/checkout-sessions/{id}Declared, not called

POST/checkout-sessions/{id}/completeDeclared, not called

POST/checkout-sessions/{id}/cancelDeclared, not called

Also declared, with no operations of their own

Fulfillmentdev.ucp.shopping.fulfillment

Extends checkout. No operations of its own.

UCP profile as served 1.5 KB as served · 63 lines

{
    "ucp": {
        "version": "2026-08-25",
        "services": {
            "dev.ucp.shopping": [
                {
                    "version": "2026-08-25",
                    "spec": "https://ucp.dev/2026-08-25/specification/overview",
                    "transport": "rest",
                    "endpoint": "https://www.happyzoo.cz/ucp/v1",
                    "schema": "https://ucp.dev/2026-08-25/services/shopping/rest.openapi.json"
                }
            ]
        },
        "capabilities": {
            "dev.ucp.shopping.catalog.search": [
                {
                    "version": "2026-08-25",
                    "spec": "https://ucp.dev/2026-08-25/specification/shopping/catalog/search",
                    "schema": "https://ucp.dev/2026-08-25/schemas/shopping/catalog_search.json"
                }
            ],
            "dev.ucp.shopping.catalog.lookup": [
                {
                    "version": "2026-08-25",
                    "spec": "https://ucp.dev/2026-08-25/specification/shopping/catalog/lookup",
                    "schema": "https://ucp.dev/2026-08-25/schemas/shopping/catalog_lookup.json"
                }
            ],
            "dev.ucp.shopping.cart": [
                {
                    "version": "2026-08-25",
                    "spec": "https://ucp.dev/2026-08-25/specification/shopping/cart",
                    "schema": "https://ucp.dev/2026-08-25/schemas/shopping/cart.json"
                }
            ],
            "dev.ucp.shopping.checkout": [
                {
                    "version": "2026-08-25",
                    "spec": "https://ucp.dev/2026-08-25/specification/shopping/checkout",
                    "schema": "https://ucp.dev/2026-08-25/schemas/shopping/checkout.json"
                }
            ],
            "dev.ucp.shopping.fulfillment": [
                {
                    "version": "2026-08-25",
                    "spec": "https://ucp.dev/2026-08-25/specification/shopping/extensions/fulfillment",
                    "schema": "https://ucp.dev/2026-08-25/schemas/shopping/fulfillment.json",
                    "extends": "dev.ucp.shopping.checkout"
                }
            ]
        },
        "payment_handlers": {},
        "business": {
            "name": "HappyZoo",
            "url": "https://www.happyzoo.cz",
            "supported_currencies": [
                "CZK"
            ],
            "contact": "[email protected]"
        }
    }
}

What goes in a UCP profile →Check your JSON in the Validator →Guides by store platform →

Is happyzoo.cz your store?

Claim it with one DNS record.

Claim this store Send an agent to shop here ↗

Status badge

Markdown ·

[![UCP Status](https://ucpchecker.com/badge/happyzoo.cz)](https://ucpchecker.com/status/happyzoo.cz)

Questions

Can UCP agents buy from happyzoo.cz?

Through its REST service, an agent can search the catalogue, build a cart and start a checkout. This is what the store declares and what our check reached; an observed agent run shows how far an agent actually gets.

Is happyzoo.cz ready for UCP agents?

happyzoo.cz publishes a valid UCP profile and scores 86/100 (grade A). 5 things to fix: the profile has no ETag or Last-Modified header, publish Organization schema (JSON-LD) on the homepage, fill in your /llms.txt brand brief and cryptographic message signing is not yet enabled.

What is a UCP profile?

The JSON file a store publishes at /.well-known/ucp to tell UCP agents which services it offers, how to call them and how it takes payment. The spec calls it the business profile. happyzoo.cz's is 1.5 KB, written for UCP 2026-08-25. What goes in a UCP profile.

How was happyzoo.cz checked?

With public requests on 7 Nov 2026: we read /.well-known/ucp and robots.txt, validated the profile against UCP 2026-08-25, checked that its spec and schema links resolve. No sign-in and no purchase. How we check.