Can AI agents order from ONCE?

55/100

C

Agentic score

Read 2026-11-08 · rules v3

Scored as a business of unknown kind; tell us yours.

Can an AI agent…

Message the business?: Yesthrough its A2A door (https://beta.once.app/api/a2a), checked 2026-11-08
Book?: No
Order?: Yesthrough its OpenAPI door (https://once.app/v1/openapi.json), checked 2026-10-09
Sign a person up?: No
Cancel a booking or an order?: No

once.app offers agents a way to order; we found no way to change, cancel or track it afterwards.

The biggest step: Let agents change a booking or an order (+11).

Track record

A track record appears once the business's inbox sends signed receipts to this network. How receipts work

Your llms.txt names an MCP server we couldn't use: it's on another site, which our check doesn't read; declare it when you claim your listing.

16 more doors your site names weren't usable either.

See how each AI crawler reads this site's robots.txt

What's missing

Let agents change a booking or an order (+11 points)

Add reschedule_booking or update_order next to the tool that creates the booking or the order.

Guide

More

Plans change; if an agent can't move a booking or change an order, the customer has to call, or cancels.

Add a tool such as reschedule_booking or update_order on the door that takes the booking or the order.

What counts: reschedule_booking, update_booking, change_reservation, update_order, modify_order, PATCH /bookings/{id}, PATCH /orders/{id}. An inbox that takes bookings or orders.
Let agents cancel (+11 points)

Add cancel_booking or cancel_order next to the tool that creates it, and state your cancellation terms in words.

Guide

More

A cancellation an agent can make frees the slot or stops the order at once, instead of becoming a no-show.

Add a tool such as cancel_booking or cancel_order on the door that takes the booking or the order, and state your cancellation terms in words.

What counts: cancel_booking, cancel_order, cancel_membership, DELETE /bookings/{id}, DELETE /orders/{id}. An inbox that takes bookings or orders.
Let agents get a receipt or an invoice (+11 points)

Add a small get_invoice tool that looks up an invoice by order number and email.

Guide

More

Customers' assistants keep records; one that can fetch the invoice doesn't ask you for it by email.

Add a small get_invoice tool, on a door of your own, that looks up an invoice by order number and email.

What counts: get_invoice, get_receipt, GET /invoices/{id}. A door that returns the receipt or the invoice for something an agent booked or ordered, or an inbox that takes orders.
Let agents see where an order or a booking stands (+11 points)

Add an order lookup by order number and email, such as get_order_status, on your MCP server or in your OpenAPI document.

Guide

More

An assistant asked where an order is can answer at once, instead of sending its person to search their email.

Add an order lookup by order number and email, such as get_order_status, on a door of your own.

What counts: get_order_status, track_order, order_status, lookup_order, GET /orders/{id}/status. UCP order management, or a line in your llms.txt such as "Order lookup API: POST https://…/orders/lookup".
Add your hours and your address to what agents can read (+3 points)

Add LocalBusiness markup in your most specific type (such as HairSalon, Restaurant or Store) to your homepage, with your name, your address and your opening hours.

Guide

More

An assistant checks who you are, where you are and when you're open before it sends anyone your way.

What counts: get_business_profile. schema.org LocalBusiness markup in its most specific type, with name, address and openingHoursSpecification. Selling online through UCP, ACP or Shopify checkout counts in place of an address.

llms.txt

Found and readable: https://once.app/llms.txt.

Through it we found 2 doors for agents we hadn't found another way; it names 14 more we couldn't use.

Each door it names

An MCP server: it answered.
An OpenAPI document: it answered.
An MCP server (×2): we couldn't use it; it's on another site, which our check doesn't read; declare it when you claim your listing.
An MCP server (×6): we couldn't use it; we ran out of time before we reached it.
An OpenAPI document: we couldn't use it; it's on another site, which our check doesn't read; declare it when you claim your listing.
An OpenAPI document (×5): we couldn't use it; we ran out of time before we reached it.

An llms.txt helps an assistant read about a business; on its own it opens no door to ask, book or order, so it earns no points. What llms.txt does, and doesn't · The llms.txt checker

Everything we checked

Capability	State	Door and how	Source	Points of weight
Find	Partly	structured data on its site	source 2026-11-08	2.5 of 5
Catalogue	Yes	structured data on its site	source 2026-11-08	5 of 5
Message	Yes	A2A	source 2026-11-08	13.3 of 13.3
Book	No	Book, order or sign up count as one: the better of them scores.		13.3 of 13.3, shared with order and sign up
Order	Yes	OpenAPI: operation POST /credits/checkoutBook, order or sign up count as one: the better of them scores.	source 2026-10-09	counted with book
Sign up	No	Book, order or sign up count as one: the better of them scores.		counted with book
Pay	Yes	OpenAPI: operation POST /credits/checkout	source 2026-10-09	13.3 of 13.3
Change	No			0 of 10
Cancel	No			0 of 10
Track	No			0 of 10
Receipt	No			0 of 10
Policies	Yes	OpenAPI: operation PUT /releases/{id}/ugc-policies	source 2026-10-09	5 of 5

+ 8 more that don't apply to this kind of business

Capability	State
Availability	Not applicable
Negotiate	Not applicable
Return or refund	Not applicable
Feedback	Not applicable
Membership	Not applicable
Vouchers	Not applicable
Waitlist	Not applicable
Support	Not applicable

Check one part of it: llms.txt · AI crawlers · MCP server · UCP and ACP · Agent inbox

Your next step

Ask your AI to help

I run once.app. Please help me make it work for AI agents, the assistants that act for customers.
1. Read what's missing: https://surfingdog.ai/b/once.app.json. Capabilities marked "no" or "partial", and the guide lines with their points, are the gaps. The rules are at https://surfingdog.ai/v1/score-rules.
2. Read https://surfingdog.ai/guides/ai-assistant-bookings/ and https://surfingdog.ai/guides/sell-through-ai-assistants/#after before suggesting anything. It's advice, not rules.
3. Ask me, and don't guess: which tools I use today (website platform, booking, checkout, payments, helpdesk), and for each action (message, quote, book, order, pay, change, cancel, track, return) whether my own system, an inbox, or nobody should handle it. Don't set up a door I can't fulfil.
4. Start with the biggest gap: Let agents change a booking or an order. Before each change, tell me in two lines what you'll change and where, and wait for my yes. Ask before anything that costs money, changes DNS or sends email.
5. Make every door findable from once.app itself: a /.well-known file, an MCP server card, or a line in llms.txt saying what each address is.
6. When done, open https://surfingdog.ai/b/once.app and use "Check again" (allowed a few minutes after the last read), then show me what changed.
Never invent prices, hours, policies or abilities: ask me.

Tools of your own already, such as a checkout, a booking system or a helpdesk? Declare them, and bridge the rest: setting up for agents.

Message for your web person

Subject: What AI agents can do on once.app: 55/100

Hello,

I checked once.app with Surfing Dog on 2026-11-08. It reads a website the way an AI assistant does when a customer asks it to book or buy, and scores how far it can go: 55/100 (C), counted as a business of a kind not known.
Full result: https://surfingdog.ai/b/once.app

Agents can already: read its catalogue, send it a message, order, pay and read its policies.

What's missing, biggest gain at the top:
1. Let agents change a booking or an order (+11 points)
   What counts: reschedule_booking, update_booking, change_reservation, update_order, modify_order, PATCH /bookings/{id}, PATCH /orders/{id}. An inbox that takes bookings or orders.
   Add reschedule_booking or update_order next to the tool that creates the booking or the order.
2. Let agents cancel (+11 points)
   What counts: cancel_booking, cancel_order, cancel_membership, DELETE /bookings/{id}, DELETE /orders/{id}. An inbox that takes bookings or orders.
   Add cancel_booking or cancel_order next to the tool that creates it, and state your cancellation terms in words.
3. Let agents get a receipt or an invoice (+11 points)
   What counts: get_invoice, get_receipt, GET /invoices/{id}. A door that returns the receipt or the invoice for something an agent booked or ordered, or an inbox that takes orders.
   Add a small get_invoice tool that looks up an invoice by order number and email.
4. Let agents see where an order or a booking stands (+11 points)
   What counts: get_order_status, track_order, order_status, lookup_order, GET /orders/{id}/status. UCP order management, or a line in your llms.txt such as "Order lookup API: POST https://…/orders/lookup".
   Add an order lookup by order number and email, such as get_order_status, on your MCP server or in your OpenAPI document.
5. Add your hours and your address to what agents can read (+3 points)
   What counts: get_business_profile. schema.org LocalBusiness markup in its most specific type, with name, address and openingHoursSpecification. Selling online through UCP, ACP or Shopify checkout counts in place of an address.
   Add LocalBusiness markup in your most specific type (such as HairSalon, Restaurant or Store) to your homepage, with your name, your address and your opening hours.

Already fine: your A2A and OpenAPI doors count; nothing to change there.

Once a change is live, open https://surfingdog.ai/b/once.app and choose "Check again": a fresh read can be asked for a few minutes after the last one.
How the score works: https://surfingdog.ai/v1/score-rules. It's not a certification; it's what the site and its doors said on 2026-11-08.

Thanks

Rank

#7 among software and AI companies in US
#41 overall

This rank counts every business checked, named on a leaderboard or not; a leaderboard numbers the businesses it names and no others, so a place there can be higher. Ordered by agentic score, then the most recent check. This is not the directory's search order, which nobody can pay to change. Leaderboards

Badge

<a href="https://surfingdog.ai/b/once.app"><img src="https://surfingdog.ai/badge/once.app.svg" alt="Agentic score, checked by Surfing Dog" height="20"></a>

Put it on your own site if you like; nothing is placed anywhere for you.

Businesses like it

Agent-ready businesses are listed in Surfing Dog Search; one whose own inbox answers is listed ahead of the rest, and joining is optional. How the order works

Listed as

Name: ONCE
What it is: ai_agents_and_tools
One line: The ethical AI music distributor. ONCE distributes AI-generated music (from Suno, Sonauto, and any other generator whose
Where: Nashville, TN, United States
Languages: English

Is this your business?

Correct what's listed, or hide this page. Free. Manage this page

Your AI can do it too (how). Checking a site is not claiming it: its owner alone can change this page. Stop all crawling of your site.

This is not a certification: it is what our crawler read on once.app's own site and doors on 2026-11-08, scored by the published rules. Nobody can pay for a score or a place.

Evidence: declared — the business's own site or door says so; tested — our own read of its door saw it listed in the 7 days before this check. We have not tried it.

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