compute

PUT `/v1/compute/servers/{serverId}/reverse-dns`

Point one address's PTR at a hostname, or reset it.

Authentication

Send an API key as a bearer token. The key must carry the sites.restart permission; a key without it is refused with 403, not 404.

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 PUT https://api.zinndigital.com/v1/compute/servers/{serverId}/reverse-dns \
  -H "Authorization: Bearer zdk_live_…" \
  -H "Content-Type: application/json" \
  -d '{ "ip": <string> }'

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

⛔ `ip` is required and is never inferred from the machine: a machine has an IPv4 and an IPv6 address with **different** default states, so "set the PTR of this server" is not a well-formed request. An empty `hostname` resets that address to the provider's own default, which is a real thing to want and is not the same as leaving it alone. ⛔⛔ **The hostname must resolve forward to this address, and that is checked before anything is written.** Receiving mail servers check forward-confirmed reverse DNS, so a PTR whose name does not point back is *worse* than the supplier's default: it looks configured on the screen and still fails delivery. A name that does not resolve at all is refused too — "we could not look it up" is not evidence the record exists. An `ip` the machine does not hold is `422`, and that refusal is the tenancy boundary: the provider would happily set a PTR for any address on the account, including another customer's. Requires `sites.restart`.

Parameters

Name	Type	Required	What it is
`serverId (path)`	`Uuid`	Yes	The server's id, as `listComputeServers` reports it. Ours (UUIDv7), minted when the order row was written — never the provider's own identifier for the machine.

Request body

Name	Type	Required	What it is
`ip`	`string`	Yes	Which address to set. ⛔ Required and never inferred: a machine has an IPv4 and an IPv6 with different default states, so "set the PTR of this server" is not a well-formed reques…
`hostname`	`string`	No	The name to point at. Empty resets the address to the provider's own default, which is a real thing to want and is not the same as leaving it alone. ⛔ A non-empty name must…

Response

Name	Type	Required	What it is
`data`	`ComputeReverseDnsRecord[]`	Yes	—

Errors this endpoint can return

401 · 403 · 404 · 422 · 429 · 503

PUT /v1/compute/servers/{serverId}/reverse-dns