public

PATCH `/v1/public/cart/{token}/items/{itemId}`

Change a line in an anonymous cart — a plan's data centre or a domain's term.

Authentication

This endpoint is public. It takes no credential and no organisation — it is what our own marketing site and AI answer engines read.

This endpoint takes no organisation id. Your key already identifies the organisation it belongs to, and the response is scoped to it.

Try it

Replace anything in angle brackets with your own values, and the key placeholder with a key from your dashboard.

curl -X PATCH https://api.zinndigital.com/v1/public/cart/{token}/items/{itemId} \
  -H "Content-Type: application/json" \
  -d '{  }'

Signed in? The API console in your dashboard fills in your real organisation id and your own key, and runs the request against the live API so you can see the actual response. Open this endpoint in the API console

Details

⚖️ s1014 R37 (owner, 2026-10-18): the data centre is chosen on the buy button AND on the checkout page. region is a public city slug (or a placement code), checked against the plan's OWN product line exactly as addPublicCartPlan checks it; "" clears the choice ("choose for me"). Returns the updated cart. A line that is not a hosting plan, or an item id from another cart, is 404; a city that line cannot use today is 422 and the stored choice is left as it was.

Parameters

Name	Type	Required	What it is
`token (path)`	`string`	Yes	The anonymous cart's opaque bearer token (`zgc_…`), as returned by `createPublicCart`. It is a credential — anyone holding it can read and modify the cart — and it travels in…
`itemId (path)`	`string`	Yes	The cart item's id.

Request body

Name	Type	Required	What it is
`region`	`string`	No	A public city slug (`helsinki`) or placement code; `""` = choose for me.
`years`	`integer`	No	s1014 DOMAINS: a domain line's registration term, within the item's own `allowed_years` (the extension's range; one year for a premium name). Out of range is a `422`…

Response

Name	Type	Required	What it is
`id`	`Uuid`	Yes	UUIDv7 identifier — sortable by creation time (docs/02 §8).
`token`	`string`	No	The bearer token. Returned only from `createPublicCart` — it is absent on every subsequent read, because only its digest is stored.
`status`	`string<open, converted, expired>`	Yes	—
`currency`	`CurrencyCode`	Yes	ISO 4217 currency code (money is minor units + this code — CLAUDE.md §2.8).
`product_line`	`string`	No	—
`expires_at`	`string`	Yes	After this the cart is gone — reads 404 whether or not it has been purged.
`items`	`PublicCartItem[]`	Yes	—
`totals`	`PublicCartTotals`	Yes	Pre-tax totals. Tax appears on the order, once a billing country exists.

Errors this endpoint can return

404 · 422 · 429

PATCH /v1/public/cart/{token}/items/{itemId}