sylius-mpp — a price that is actually enforced.

An advertised price that nobody charges is false information.

API Platform publishes its OpenAPI document at /docs.jsonopenapi. MPP discovery looks for exactly /openapi.json and nowhere else. A shop that already serves a complete and correct document is therefore still not discoverable for MPP — the bundle closes precisely that gap instead of talking the discovery side into making an exception.

The prices in x-payment-info come from the same table that enforcement reads from. A route therefore cannot advertise a price it does not charge. With two sources, the divergence would only be a matter of time — and it would surface only once an agent pays the advertised amount and is rejected anyway.

Every payable operation additionally declares its 402 response in the schema. A client reading the document therefore knows in advance that this route will require a payment, and can plan for it — instead of treating the 402 as an error it did not expect.