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The agentic commerce experience & testing platform is here.

Agentic Commerce Studio

From AI agent product search to payment completion. Experience the entire agentic commerce process with just a browser.

Try for FreeRequest Materials
Stellagent
T
New Session
Today
Find a white shirt
Oxford Shirt $19.90 — Completed
Winter coat help
3 products found
Yesterday
Sizing question
Session expired
UCPACP
Find a white shirtCompleted
UCP6 req · 234ms
Looking for a casual white shirt, budget around $20.
Stellagent
Found 3 shirts within your budget. Here are popular Supima cotton picks.
Oxford Shirt
Supima Cotton · Regular Fit
$19.90
Linen Shirt
French Linen · Relaxed Fit
$25.90
Broadcloth Shirt
Broadcloth · Slim Fit
$12.90
Oxford Shirt in white, size M please.
Stellagent
Checkoutready_for_complete
Oxford Shirt White M × 1$19.90
Shipping$3.50
Tax (10%)$1.99
Total$25.39
1-1-1 Jingumae, Shibuya, TokyoVISA ****1234
Purchase complete
ORD-2026-0001 · $25.39 · VISA ****1234 · 234ms
Type a message...
CmdEnter

Agentic Commerce in Motion Worldwide — Protocol Development Partners

What You'll Experience

Three Flows to Experience in Studio

AI agents discover products, create checkout, and complete payment. Experience these three steps while tracking protocol communications.

01
Product Discovery

AI Agent Finds and Suggests Products

The agent interprets user intent from natural language and searches the merchant's product catalog. It presents the best matches as product cards within the conversation. In UCP, the agent first retrieves the merchant's supported capabilities via /.well-known/ucp, then negotiates the intersection of capabilities before performing the search.

Capability NegotiationNatural Language SearchACP / UCP Comparison
Chat
Stellagent
StellagentOnline
UCP
Looking for a casual white shirt
Stellagent
How about these options?
Oxford Shirt ¥2,990
Linen Shirt ¥3,990
Broadcloth ¥1,990
Type a message...
Sequence
Agent
Merchant
PSP
AgentMerchant
GET /.well-known/ucp
capabilities: [cart, checkout, search]
negotiate
agreed: [search, checkout]
AgentMerchant
POST /search
products: 3 items (45ms)
Display product cards
02
Checkout

From Session Creation to Order Confirmation

After product selection, a checkout session is created. You can follow the protocol-compliant status transitions (incomplete → ready_for_complete) through shipping and payment configuration, tax and shipping recalculation, and order confirmation.

Status TransitionsShipping OptionsTotal Recalculation
Chat
Stellagent
StellagentOnline
UCP
Oxford shirt, white, size M please
Stellagent
Checkout session created.
Oxford Shirt White M x1 ¥2,990
Shipping ¥500 / Tax ¥272
Total ¥3,762
Type a message...
Sequence
Agent
Merchant
PSP
AgentMerchant
POST /checkout_sessions
status: incomplete
AgentMerchant
PATCH /sessions/{id}
shipping: Shibuya, Jingumae
totals recalculated
AgentMerchant
PATCH /sessions/{id}
status: ready_for_complete
03
Payment Processing

Track Trust Triangle Payments in Real Time

Payment is processed differently depending on the protocol. In ACP, the PSP issues a constrained delegation token (SPT), and the Merchant charges against it. In UCP, the Credential Provider tokenizes card details, and the PSP detokenizes and authorizes via the Card Network — the "Trust Triangle" model. You can confirm all communications in real time via Server Logs.

Trust TriangleTest Cards3DS / Decline Scenarios
Chat
Stellagent
StellagentOnline
UCP
Please confirm the purchase
Stellagent
Processing payment...
Purchase Complete
ORD-2026-0001 ¥3,762
VISA ****1234
Type a message...
Sequence
Agent
Merchant
PSP
AgentPSP
delegate_payment
vault_token: vt_01J8Z3WX...
AgentMerchant
sessions/complete
vault_token attached
MerchantPSP
POST /payments
Authorize
Approved (234ms)

By experiencing these three steps end-to-end, you'll intuitively understand what APIs your EC needs and what payment flow changes are required — without reading specifications.

From Try to Live

Experience First. Understand.
Then Go Live.

Day one: grasp the overview via simulation. Once your understanding deepens, connect your own data for PoC. The verified configuration then becomes your live agent connection endpoint. Experience → Verification → Production — one continuous path.

01
EXPERIENCE

Experience First (Day One, No Setup)

Grasp the overview with virtual merchants and test payments. No technical knowledge required — business planning teams can try immediately.

02
VERIFY

Try with Your EC (Product Data Connection)

Connect your product API and inventory. Verify with real data: Can AI agents find your products?

03
VERIFY

Process Payments (PSP Connection)

Connect your payment infrastructure. Verify the full tokenization, authorization, and charging flow in a live environment.

04
PRODUCTION

Accept Agents (Production)

Your verified configuration becomes the connection endpoint for ChatGPT, Gemini, Copilot, and other AI agents.

The environment you experience in Studio becomes your production.

Protocol Landscape

Competing Protocols — Test Them All in One Environment

Google, OpenAI, Visa, Mastercard — each creating their own protocols in an ongoing standards race. Before wondering which to support, test and compare them all.

20+Supported Protocols (Ready + Planned)
9Layer Coverage
+40%Multi-protocol Traffic Increase
LayerProtocols
Commerce
Product discovery to order flow
ACPUCP
Catalog / Discovery
Product info, discovery & distribution
ACP FeedsGoogle Merchant CenterShopify CatalogAgentic Storefronts
Checkout / Payment Delegation
Payment delegation & SPT
Delegated Payment + Stripe SPTGoogle Pay HandlerAP2
Card Network / Token
Card data protection & tokenization
Visa VICMC Agent PayAmex
Authorization / Intent
Human-to-agent authorization
Visa TAPMC Verifiable IntentAP2 Intent Mandate
Agent Identity
Who is the agent itself
SKYFIRESkyfire KYAWeb Bot AuthW3CVerifiable Credentials
Agent Interoperability
Inter-agent communication
MCPA2A
Agent Payment Rail
Machine payment rails
x402TEMPOMPP
Platform-Specific
Platform-specific implementations
Amazon Rufus / Alexa+Meta UCP plannedCopilotInstant Buy

Shopify, PayPal, Stripe, and Adobe Commerce support both UCP and ACP. Dual-protocol implementation reportedly increases agent-driven traffic by 40%. The answer is becoming "both," not "either/or."

No need to worry about which protocol to bet on

Agentic commerce is in its early standardization phase, and it will take years before winners emerge. But waiting itself is the risk. Agentic Commerce Studio updates its environment with each new protocol. Today's testing environment keeps pace with tomorrow's protocol changes, enabling a 'move first, fix later' approach.

For Your Role

The Value of Trying
— From Your Perspective

EC operators, PSPs, and EC platforms — each has reasons to use Agentic Commerce Studio from their perspective.

Merchant

EC Operators / Business Planning

Experience and understand what it takes to become an EC chosen by AI

→Verify whether AI agents can discover your products
→See at a glance how structured data affects search results
→Hands-on experience makes clear what to tackle first
→Generate validation reports ready for internal approval

PSP

Payment Service Providers — Credential Providers

Verify new requirements from Visa TAP / MC Agent Pay in a sandbox

→Test the full flow of delegate_payment / tokenize / detokenize
→Stay ahead of infrastructure requirements coming after 3DS mandates
→Use the Merchant Simulator for standalone PSP verification
→Obtain evidence-based data for 'AI payment readiness' proposals to merchants

EC Platform

EC Platforms — BASE, Shopify, and more

Gain design guidance for providing AI-readiness to merchants

→Understand what to implement on the platform side so merchants can be AI-ready
→Supporting both UCP and ACP — reports show +40% traffic via agents
→Compare multi-protocol implementation strategies with live behavior
→Use as a design and PoC environment for new merchant-facing features
How to Get Started

Start Experiencing Same Day

"Just want to see first" is perfectly fine. Account issued same day from inquiry. Pricing is shared after your demo booking, tailored to your scope.

[01/03]· CONTACT

Contact Us

Submit via the form in 30 seconds. It's perfectly fine if you're still at the information-gathering stage or not yet technical. We'll propose an experience plan tailored to your situation.

[02/03]· AGREEMENT

Agreement & NDA

A procedure to securely share protocol specifications and simulation environment details. Can be completed as early as the same day.

[03/03]· START

Experience Instantly via Browser

After account issuance, access Agentic Commerce Studio from your browser. Start with a 5-minute simulation experience. Then test all protocols freely for one year.

Low barriers, high results Simulation experience is possible without a tech team. Business leaders and planners alone can grasp the full picture of AI agent purchasing.

In North America, Google and Shopify have announced UCP, and Walmart and other majors are moving into full rollout. Agentic commerce is already taking shape inside real businesses with real teams behind it. For Asia, the question is not "if" but "when."

Knowing it's coming doesn't tell you how to prepare. That was the answer we heard from both merchants and PSPs, and it's where Studio began. So we built a place where anyone, regardless of role, can stop reading specs and start trying things. Please take a moment to experience the full flow firsthand.

Stellagent Inc.
CEO Akihiro Suzuki
FAQ

Frequently Asked Questions

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