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ZANISS SOFTWARES
ZANISS SOFTWARES

Posted on Originally published at zanisssoftwares.com

Building an Agent-Ready Checkout: A Practical Look at ACP and AP2 in 2026

If you ship e-commerce or B2B catalog software, "agentic commerce" isn't a marketing buzzword you can ignore this cycle — it's a real integration surface. OpenAI's Agentic Commerce Protocol (co-built with Stripe) and Google's Agent Payments Protocol (AP2) both define how an AI agent can read your product catalog and complete a checkout without a human clicking through your UI.

From an engineering standpoint, the work breaks into three layers: machine-readable product data (clean schema.org/Product JSON-LD, kept in sync — not a one-time export), a feed an agent platform can actually pull from, and an order/payment endpoint that speaks one of these protocols against your existing payment gateway and inventory system. AP2's "mandate" model is worth studying closely if you're building the payment layer — it's a cryptographically signed authorization object, not a stored card number handed to a bot, which changes your fraud and consent handling meaningfully.

For Indian teams, there's a useful shortcut: if your catalog is already ONDC-integrated, you've done a good chunk of this groundwork already, since ONDC solves the same "any buyer agent, any seller catalog" problem at the network level.

We wrote up the fuller breakdown — including realistic cost tiers for Indian teams building this — here: Agentic Commerce Readiness: How Indian Businesses Get Discovered and Bought by AI Shopping Agents in 2026.

Curious what other dev teams are seeing — is anyone here already running ACP or AP2 in production, or still in sandbox?

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