B2B already has agentic commerce. It is called punchout.

Part 3 of four on agentic commerce. The series opens with Stripe says the checkout page is dying.

The whole agentic-commerce conversation is conducted as though it were new. In B2B it is not new. It is old, dull, and has been called punchout and EDI since the early 2000s.

A buyer at a larger company has not browsed your store in twenty years. Their procurement system does it for them — pulls your catalogue, renders it inside its own interface, and sends back an order that never passes anything you would call a checkout.

That is machine to machine. It is precisely what Stripe is describing. The difference is that B2B got there first, without giving it a name.

What B2B has already solved

And what the consumer side is now about to solve again, in new packaging:

• Customer-specific pricing in a machine-readable answer. Not list price — the agreed price for that customer.
• Authorisation. Who may buy, for how much, and what needs approval. Credit limits and approval flows are old solutions to exactly the question the consumer side is now wrestling with.
• The catalogue as a data source, not as pages. Product data has to stand on its own, with no design around it.
• Repeat purchasing without a human decision. Call-off orders and scheduled deliveries.

Notice how closely that list matches what is missing on the consumer side. Low stakes, repeated purchases, clear authorisation — those are exactly the conditions under which agentic commerce works today, and they are B2B’s ordinary Tuesday.

Why it matters for you

If you sell to businesses and consumers both, you have already built half of what is required. You just built it in the B2B side and thought of it as an integration rather than as a capability.

That is an unusually comfortable position. The consumer side has to learn something B2B already knows, and if the same catalogue and the same pricing logic serve both channels, you do not have to learn it twice.

If instead you run two separate systems — a store for consumers and a portal for businesses, each with its own product data — you get to do the work twice, and one of those times in the system that was not built for it.

One thing not to be glib about

That B2B solved it technically does not mean it solved it well. Most punchout setups are brittle, expensive to change, and understood by one person. EDI flows break silently and get noticed when somebody wonders where the orders went.

The point is not that B2B did it nicely. The point is that B2B was already forced to answer the questions — who may buy, at what price, under what authorisation — and that the answers exist somewhere in your organisation.

We have written about how that connects to the ERP in a separate post, and about the B2B portal as a product under the reseller portal.