UCP Checker — Agents are already shopping. Can they buy from you?

01 · Onboard

Set up in two minutes flat

Add one DNS TXT record and we verify ownership — then live and staging onboard together, from the same record. No SDK, no code changes, no redeploy.

✓Paste a domain — we fetch /.well-known/ucp and read what agents actually see

✓One _ucp-verify TXT record proves control of the whole domain

✓Your staging subdomain inherits verification and is monitored privately

Start monitoring →

⌕northwind.example Verify

✓ Fetching /.well-known/ucp 200 · 4,130 B

✓ Checking DNS TXT · _ucp-verify resolving…

✓ Live verifiednorthwind.example · public directory ✓Public

✓ Staging verifiedstaging.northwind.example · inherited 🔒 Private

UCP SCORE · LIVE SPEC v2026-08-25 ●Live

94/ 100

A

▴ +3 pts

Discovery 95

Conformance 92

Capability 96

▲ Scored against the spec version agents resolve today

02 · Measure

One score, against the live spec

Not a checklist against last year's draft. We grade you against the spec version agents resolve right now — and roll it into a single 0–100 number across three pillars.

✓Discovery — can an agent find and read your profile at all?

✓Conformance — does every field pass the current schema and auth contract?

✓Capability — how much can an agent actually do: search, cart, checkout?

Start monitoring →See live score reports

03 · Inspect

See exactly what agents fetch

The profile and llms.txt we last pulled from your domain — byte for byte, no interpretation. This is the surface an agent reads before it ever decides to buy.

GET northwind.example/.well-known/ucp

{
    "ucp": {
        "version": "2026-08-25",
        "supported_versions": {
            "2026-04-08": "https://northwind.example/.well-known/ucp/2026-04-08",
            "2026-01-23": "https://northwind.example/.well-known/ucp/2026-01-23"
        },
        "services": {
            "dev.ucp.shopping": [
                {
                    "version": "2026-08-25",
                    "spec": "https://ucp.dev/2026-08-25/specification/overview/",
                    "transport": "mcp",
                    "endpoint": "https://northwind.example/api/ucp/mcp",
                    "schema": "https://ucp.dev/2026-08-25/services/shopping/mcp.openrpc.json"
                }
            ]
        },
        "capabilities": [
            "checkout", "cart", "catalog-search", "order"
        ],
        "payment_handlers": [
            "com.google.pay"
        ],
        "verified": true
    }
}

# northwind.example · /llms.txt  agent instructions · 4,347 bytes

## Commerce Protocol (UCP)
This store supports the Universal Commerce Protocol. Agents
should read /.well-known/ucp for the machine-readable profile.

### Store Metadata
- Sitemap: GET /sitemap.xml
- Agent discovery: the canonical agent-facing description of
  the store is at /agents.md.

## Store Policies
- Checkout is buyer-approved on every payment.
- Returns accepted within 30 days of fulfilment.
- Prices and availability are authoritative in the profile.

✓Profile found & signed ✓llms.txt mentions UCP ✓sitemap.xml ✓Open Graph Last fetched 1h ago

04 · Decode

Payment & identity, decoded

The parts of agentic checkout nobody else shows you: which payment handlers are authority-bound, whether identity is linked, and if your signing keys are published for permissionless auth.

Declared payment handlers

How agents pay and act on behalf of a buyer · northwind.example

3 HANDLERS

Google Pay✓ authority-bound

com.google.pay · v2026-01-11

Northwind Card✓ authority-bound

com.northwind.card · v2026-01-15

Northwind Wallet✓ authority-bound

com.northwind.wallet · v2026-04-08

Identity linking

✕Not declared

dev.ucp.common.identity_linking

Payment token

✕Not detected

tokenized card handoff

Signing keys

✕None published

RFC 9421 · permissionless auth

05 · Pre-flight

Catch it on staging, first

Point us at a staging subdomain and it's monitored privately — never listed on the public directory. We warn you on version drift before a deploy ships a broken profile to production.

✓Staging inherits your verification — no second DNS record

✓Diff staging vs live and see exactly which fields changed

✓Version-drift warnings when staging targets a different spec than prod

Pre-production

Private staging monitor

🔒 Never public

northwind.example ✓Live · v2026-08-25

staging.northwind.example !v2026-01-23

▲ Version drift — staging is 2 spec versions behind live

06 · Watch

Know the moment it breaks

Conformance is uptime now. We re-check every monitored business daily and alert you the instant an agent would hit a wall.

northwind.example/.well-known/ucp

99.97%conformance · 90 days

90 days agoToday

ConformantDegradedFailing

Re-checked every 24 hours · break alerts by email

▲

Dropped to grade B

Signing keys withdrawn from profile root

2h ago

✓

Score +3 · new checkout capability

Agentic checkout endpoint now responds

1d ago

✕

Outage · profile unreachable ~3h

Origin returned 503 from two regions

37d ago

07 · Benchmark

Your watchlist, benchmarked daily

Add any business to your watchlist and benchmark your readiness against the field — scores, grades, capabilities and every change, side by side. Only an independent can show you this.

#	Business	UCP Score	Grade	Capabilities	Status	30D
1	Nnorthwind.example YOU	96	A	4	✓Verified	▴ +1.2
2	Aaldermere.example	94	A	4	✓Verified	▾ −0.4
3	Ffernwick.example	94	A	4	✓Verified	▾ −1.1
4	Ssaltgrove.example	92	A	4	✓Verified	— 0.0
5	Hharborlane.example	90	A	4	✓Verified	▴ +2.0

Every business on your watchlist is re-checked daily — scores, status & changes

Early access

First-class monitoring
for agentic commerce

Deep visibility into your profile, staging and watchlist — no matter where you sell. In beta, with invites going out in small batches.

In beta Request an invite

The monitoring dashboard

Tell us who you are — we'll send your invite.

✓Everything included — early workspaces keep free access
✓Verify with one DNS record · live + staging onboard together
✓Daily monitoring, break alerts & watchlist benchmarks

Running a fleet, a platform, or many properties?

Talk to us about Fleet & Enterprise →

FAQ

Questions, answered

What is UCP, and why does my profile matter?

The Universal Commerce Protocol is how AI shopping agents discover and transact with a business. When ChatGPT, Gemini or Claude shops on a buyer's behalf, it reads your machine-readable profile at /.well-known/ucp — not your homepage. If the profile is missing, invalid or drifts from the live spec, agents can't buy from you.

How is the UCP Score calculated?

We fetch your profile and related files, then grade three pillars against the spec version agents resolve today: Discovery (can it be found and read), Conformance (does every field pass the current schema and auth contract) and Capability (how much an agent can actually do). Those roll up into a single 0–100 score and letter grade.

Do I need to install anything or change code?

No. Paste a domain to run a free check instantly. To unlock ownership-verified monitoring, add one _ucpchecker DNS TXT record — live and staging onboard together from that single record. No SDK, no redeploy.

How often do you re-check my business?

Every verified business is re-checked every 24 hours, with recent checks visible in your dashboard.

Is my staging environment ever made public?

Never. Staging subdomains inherit your verification and are monitored privately — they are never listed on the public directory. You get version-drift warnings when staging targets a different spec version than production.

Why is it free?

The spec is early and moving fast — and so are we. While UCP is still settling, we're shipping quickly and bundling as much as we can into the free package. As the spec's capabilities stabilise and the ecosystem's demands grow, higher frequency, authenticated access and advanced capabilities will likely extend into paid tiers — early workspaces keep their free access.

How does early access work?

Request an invite with your business domain and we onboard in small batches. Once you're in, you verify ownership with one DNS TXT record and keep free access as an early workspace. Free public checks work for everyone, invite or not.

Agents are already shopping.Can they buy from you?