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UCP Verification Report

stays.ucpsandbox.com

Live Universal Commerce Protocol & Agentic Commerce status, manifest, and capability breakdown.

✓Verified
B 84/100
Latency 111ms Spec 2026-08-25 HTTP 200 Security HTTPS Observed 9 hours ago

What is UCP? The Universal Commerce Protocol is the open standard AI shopping agents use to discover, browse, and check out at online stores. Read the spec overview →

84
/ 100
UCP Conformance Score
B

Solid UCP setup on stays.ucpsandbox.com with a few gaps left to close.

Agent Discovery85
UCP Conformance100
Capability Coverage60
Verified

stays.ucpsandbox.com publishes a valid UCP manifest. That is what it declares. An observed agent run shows how far an agent actually gets.

Latency
111ms
Version
2026-08-25
Robots.txt
Allowed ✅

/llms.txt content

The plain-text brief this store publishes to AI agents. Captured on the most recent check.

5.2 KB10e94a61d31c8aae
mentions UCP
# Harbour Row Stays

> A small guesthouse on the harbour. A reference travel store for booking agents.
> Independent reference stores, run by UCP Checker. Not affiliated with the UCP project or Google. Nothing here is for sale: test cards only, no goods ship.

Reference lodging store operated by UCP Checker. UCP 2026-08-25; lodging booking is the draft capability dev.ucp.lodging.booking (not in the 2026-08-25 release).
Everything an agent can do here a person can do on the same pages: same rooms, same booking sessions, same bookings.

## Machine surfaces

- UCP discovery manifest: https://stays.ucpsandbox.com/.well-known/ucp
- REST (lodging service): https://stays.ucpsandbox.com/ucp/booking-sessions and friends (OpenAPI at https://stays.ucpsandbox.com/ucp/openapi.json)
- MCP endpoint (JSON-RPC): https://stays.ucpsandbox.com/mcp: search_properties, create/get/update/complete/cancel_booking_session, get_booking, cancel_booking, lookup_locations
- Store search (not UCP): https://stays.ucpsandbox.com/ucp/search?start_date=YYYY-MM-DD&end_date=YYYY-MM-DD&adults=2
- WebMCP: storefront pages register tools on document.modelContext

## Property

- Property id: prop_harbour_row
- Address: 14 Harbour Row, Portland, ME 04101
- Check-in from 15:00, check-out by 11:00 (America/New_York)
- Bookable 60 nights ahead, up to 14 nights per stay, one room per booking session

## Rooms

- rt_harbour: Harbour Room. Sleeps 2 · Queen bed · Sea view · 24 m². From $189.00 a night on the flexible rate.
- rt_loft: Loft Suite. Sleeps 3 · King bed + daybed · Terrace · 38 m². From $264.00 a night on the flexible rate.
- rt_garden: Garden Studio. Sleeps 2 · Double bed · Kitchenette · 28 m². From $172.00 a night on the flexible rate.
- rt_quay: Quay Twin. Sleeps 2 · Twin beds · Courtyard · 21 m². From $158.00 a night on the flexible rate.

## Rate plans

- rp_flex: Flexible. Room only. Free cancellation until 3 pm hotel time two days before check-in; after that the first night is charged. Pay when you book or at the property.
- rp_flex_bb: Flexible with breakfast. Everything in Flexible, plus breakfast for two each morning, served from 7:30 to 10 in the front room.
- rp_saver: Non-refundable. Room only, 12% off the flexible rate. Paid in full when you book; no changes or refunds once booked.
- rp_member: Member rate. 10% off the flexible rate with the same free cancellation, plus late check-out until 1 pm. For Harbour Row Club members: link your account at the guest step.

## Policies

- Cancellation: Flexible rates can be cancelled free of charge until 3 pm hotel time two days before check-in. After that deadline the first night is charged and the rest is refunded, or released if you were paying at the property. Non-refundable rates are paid in full at booking and are not refunded or changed. Cancel from your confirmation page or through the booking's cancel operation.
- Payment: Flexible rates can be paid in full when you book, or at the property on arrival with a card held as a guarantee. Non-refundable rates are paid in full when you book. This is a test store: only test cards are accepted and no money moves.
- House rules: Check-in is from 3 pm with a door code sent on the morning of arrival; check-out is by 11 am (1 pm on the member rate). The house is quiet after 10 pm. No smoking anywhere in the building. Dogs are welcome in the Garden Studio by arrangement and nowhere else. Children are welcome; the Harbour Room and Loft Suite take one child in addition to two adults.
- Privacy: A test store keeps booking details for seven days and then deletes them. Nothing is shared with anyone; nobody is expecting you.

## Testing

- Payment instruments (handler mock_payment_handler): instr_1 (Visa …1234, approves); instr_2 (Mastercard …5678, approves); instr_fail (Visa …0000, declines)
- Pay at the property: payment.selected_term_id "pt_pay_at_property", instrument handler_id "pay_at_property" (card held as guarantee, nothing charged)
- Member: [email protected] is a Harbour Row Club member (member rate rp_member)
- Scenarios: stays-search-miss.ucpsandbox.com (Catalogue search returns nothing for every query.); stays-slow.ucpsandbox.com (Every response is delayed by two seconds.); stays-decline.ucpsandbox.com (Every payment is declined by the issuer.)

## FAQ

- Q: Is anyone actually expecting me? A: No. Harbour Row Stays is a reference store run by UCP Checker for testing booking agents. Bookings are recorded, confirmed and cancellable, but the house does not exist.
- Q: When is the free cancellation deadline? A: 3 pm hotel time (America/New_York) two days before check-in, on flexible and member rates. The exact deadline is on every booking session and confirmation.
- Q: What does 'pay at the property' mean here? A: Nothing is charged when you book. A test card is held as a guarantee under the pay_at_property handler and the full amount is due at check-in.
- Q: How do I get the member rate? A: Link a Harbour Row Club account at the guest step. In this test store, [email protected] is a member; the rate is 10% off flexible with late check-out.
- Q: Can I book more than one room? A: One room per booking session. Make a second session for a second room.
- Q: How far ahead can I book? A: Sixty days. The calendar rolls forward every night so there are always sixty bookable nights.
View source ↗

Capabilities Detected

UCP capabilities supported by this endpoint
Booking ✓ Bound 2026-08-25
Payment Terms Extension ✓ Bound 2026-08-25
Policy Cancellation Extension ✓ Bound 2026-08-25
Location Lookup ✓ Bound 2026-08-25

Technical Vitals

Technical details for this UCP endpoint
UCP Status Verified
Endpoint https://stays.ucpsandbox.com/.well-known/ucp
HTTP Status 200
UCP Version 2026-08-25
Transports REST, MCP
Last Observed
Last Full Index
Domain Alerts

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Access

AI Agent Access (robots.txt)

AI agent access permissions based on robots.txt
GPTBotOpenAI / ChatGPT ✓Allowed
Google-ExtendedGemini / Google ✓Allowed
ClaudeBotClaude / Anthropic ✓Allowed
Applebot-ExtendedApple Intelligence ✓Allowed
CCBotCommon Crawl ✓Allowed
Checkout

Payment Configuration

💳 Payment Handler mock_payment_handler
Gateway:Unknown
💳 Pay At Property pay_at_property
Gateway:Unknown
Raw UCP Manifest JSON
{
    "ucp": {
        "version": "2026-08-25",
        "services": {
            "dev.ucp.common": [
                {
                    "spec": "https://ucp.dev/2026-08-25/specification/overview",
                    "schema": "https://ucp.dev/2026-08-25/services/common/rest.openapi.json",
                    "version": "2026-08-25",
                    "endpoint": "https://stays.ucpsandbox.com/ucp/common",
                    "transport": "rest"
                },
                {
                    "spec": "https://ucp.dev/2026-08-25/specification/overview",
                    "schema": "https://ucp.dev/2026-08-25/services/common/mcp.openrpc.json",
                    "version": "2026-08-25",
                    "endpoint": "https://stays.ucpsandbox.com/mcp",
                    "transport": "mcp"
                }
            ],
            "dev.ucp.lodging": [
                {
                    "spec": "https://ucp.dev/draft/specification/overview",
                    "schema": "https://ucp.dev/draft/services/lodging/rest.openapi.json",
                    "version": "2026-08-25",
                    "endpoint": "https://stays.ucpsandbox.com/ucp",
                    "transport": "rest"
                },
                {
                    "spec": "https://ucp.dev/draft/specification/overview",
                    "schema": "https://ucp.dev/draft/services/lodging/mcp.openrpc.json",
                    "version": "2026-08-25",
                    "endpoint": "https://stays.ucpsandbox.com/mcp",
                    "transport": "mcp"
                }
            ]
        },
        "capabilities": {
            "dev.ucp.lodging.booking": [
                {
                    "spec": "https://ucp.dev/draft/specification/lodging/booking",
                    "schema": "https://ucp.dev/draft/schemas/lodging/booking.json",
                    "version": "2026-08-25"
                }
            ],
            "dev.ucp.common.payment.terms": [
                {
                    "spec": "https://ucp.dev/2026-08-25/specification/payment/extensions/terms",
                    "schema": "https://ucp.dev/2026-08-25/schemas/common/payment_terms.json",
                    "extends": [
                        "dev.ucp.lodging.booking"
                    ],
                    "version": "2026-08-25"
                }
            ],
            "dev.ucp.common.location.lookup": [
                {
                    "spec": "https://ucp.dev/2026-08-25/specification/location/lookup",
                    "schema": "https://ucp.dev/2026-08-25/schemas/common/location_lookup.json",
                    "version": "2026-08-25"
                }
            ],
            "dev.ucp.lodging.policy.cancellation": [
                {
                    "spec": "https://ucp.dev/draft/specification/lodging/extensions/cancellation-policy",
                    "schema": "https://ucp.dev/draft/schemas/lodging/policy_cancellation.json",
                    "extends": [
                        "dev.ucp.lodging.booking"
                    ],
                    "version": "2026-08-25"
                }
            ]
        },
        "payment_handlers": {
            "dev.mock.payment_handler": [
                {
                    "id": "mock_payment_handler",
                    "spec": "https://mock.dev/ucp/payment-handler",
                    "config": [],
                    "version": "2026-08-25",
                    "available_instruments": [
                        {
                            "type": "card"
                        }
                    ]
                }
            ],
            "com.ucpsandbox.pay_at_property": [
                {
                    "id": "pay_at_property",
                    "spec": "https://ucpsandbox.com/docs/pay-at-property",
                    "config": {
                        "collects": "at_property",
                        "guarantee": "card"
                    },
                    "version": "2026-08-25",
                    "available_instruments": [
                        {
                            "type": "card"
                        }
                    ]
                }
            ]
        }
    },
    "keys": [
        {
            "x": "WDEOwuWEythXIRXxvPJ10hL7mFy2xBwvUSgik5XeP3g",
            "alg": "EdDSA",
            "crv": "Ed25519",
            "kid": "5aFwgaXo9t7DMkkLfKLcksBd_7jrZPhOL4YyJaNmLaE",
            "kty": "OKP",
            "use": "sig"
        }
    ],
    "name": "Harbour Row Stays",
    "description": "Independent reference stores, run by UCP Checker. Not affiliated with the UCP project or Google. Nothing here is for sale: test cards only, no goods ship.",
    "signing_keys": [
        {
            "x": "WDEOwuWEythXIRXxvPJ10hL7mFy2xBwvUSgik5XeP3g",
            "alg": "EdDSA",
            "crv": "Ed25519",
            "kid": "5aFwgaXo9t7DMkkLfKLcksBd_7jrZPhOL4YyJaNmLaE",
            "kty": "OKP",
            "use": "sig"
        }
    ]
}
Capability Match

Other verified stores with similar capabilities

Stores that share the most UCP capabilities with stays.ucpsandbox.com, ranked by overlap.

Frequently Asked

About this stays.ucpsandbox.com report

What does it mean that stays.ucpsandbox.com is verified for UCP?
It means stays.ucpsandbox.com publishes a valid UCP manifest at /.well-known/ucp, the manifest passes schema validation against 2026-08-25, and AI agents can discover its commerce capabilities without needing to scrape HTML. That is what the store declares. Whether an agent actually completes a purchase is a separate question — where an observed agent run is shown on this page, it answers that one.
Can I trust stays.ucpsandbox.com for AI agent purchases?
Verification means the store is technically ready — payment handlers declared, transports reachable, schema valid. It doesn't grade business reputation or fulfilment quality. For trust on the commerce side itself, check the store's own reviews. For trust on the agent integration side, this page is the source of truth.
What platform does stays.ucpsandbox.com use for UCP?
Our detection identifies stays.ucpsandbox.com as running on Custom. Many large UCP-verified stores use Shopify, BigCommerce, or custom stacks built on the open spec. The transport list above shows the exact mechanism (REST, MCP, A2A, Embedded) the manifest declares.
How was this UCP report for stays.ucpsandbox.com generated?
Our crawler fetches stays.ucpsandbox.com/.well-known/ucp directly, parses the manifest against the official UCP JSON schema, checks robots.txt for AI bot policies, and runs payment-handler validation. No manual review, no opinions — just what the manifest actually says. The check ran 9 hours ago.
How often is stays.ucpsandbox.com re-checked?
Every domain in our directory is re-crawled at least every 24 hours. You can also trigger a fresh check from this page at any time, or subscribe to alerts to get notified the moment the status changes — that's how we built the only continuously updated UCP directory on the internet.
Why does this status matter?
Universal Commerce Protocol is the standard AI shopping agents (ChatGPT, Claude, Gemini, Apple Intelligence) use to discover what a store sells, how to add items to a cart, and how to check out. If a store isn't UCP-verified, agents can still scrape it — but they'll be slower, less reliable, and far more likely to fail at checkout. UCP turns a guess into a guarantee.

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