Two shipping tiers have been renamed in the RPI Print API. Express is now Expedited, and Priority is now Rush. Standard is unchanged. The tiers themselves are the same service at the same prices with the same delivery estimates — only the names have changed.
No action is required
express and priority remain valid values for shippingClassification on order creation, with no retirement date. Requests you send today keep working exactly as they do now.
Orders you have already placed are unaffected. Their stored classification does not change.
What your responses contain
An order submitted as express or priority is stored and returned with that spelling. Create an order with "shippingClassification": "express" and the methodClassification field on the order response and on the order webhook comes back as express, not expedited.
Economy behaves differently, and which behavior you get depends on your account. Accounts priced under an enterprise agreement keep the tier: an order submitted as economy ships as Economy and is returned as economy, unchanged. On every other account Economy is no longer offered, so an order submitted as economy ships and is returned as standard. The value stays accepted either way, so your request still succeeds — the response names the tier the order actually ships on.
What changed in the documentation
The API reference, the shipping estimate endpoint, and the pricelist now name the tiers Standard, Expedited and Rush. If you display tier names taken from those responses, your users will see the new names.
Which tiers you can buy depends on where the order ships. Standard, Expedited and Rush are sold across most of the United States, and Alaska, Hawaii, Canada and the US territories each sell a different subset. Call the shipping estimate for an address to get the tiers that address can be sold.
Move to the new names whenever it suits you. There is no deadline.