Validate nameservers

Validate nameserver hostnames before a domain order, transfer, or nameserver update. This is a public utility endpoint and does not require an API key. Provide domain when validating in-bailiwick child nameservers so the registry glue-host check can run; for example, ns1.example.com for example.com can fail with GLUE_HOST_NOT_REGISTERED until glue is registered.

Domains & DNS Nameservers

Authentication

No authentication required.

Context

Headers

Accept Example
Content-Type Example

Body

required
application/json
nameservers array required · Example: ["primary.ns.hostup.se","secondary.ns.hostup.se"]
domain string · Example: example.com

Optional domain name for registry glue validation.

Responses

200 Per-nameserver validation results.
results array<object>
results[].ns string required · Example: primary.ns.hostup.se
results[].isValid boolean required · Example: true
results[].errorCode stringnull · enum required · Example: null
EMPTY_VALUE
INVALID_FORMAT
NOT_FOUND
DNS_RESOLUTION_FAILED
GLUE_HOST_NOT_REGISTERED
results[].errorMessage stringnull required · Example: null
400 Invalid request. The response body is an RFC 7807 Problem Details document.
type string · Example: https://developer.hostup.se/errors/invalid_request
title string · Example: Validation failed
status integer · Example: 400
detail string · Example: The request body failed validation.
code string · Example: invalid_request

Stable machine-readable code. Branch on this field, not on `detail`.

instance string · Example: /api/v2/orders
requestId string · Example: req_01hxa3b4c5d6e7f8g9h0j1k2m3
timestamp string · Example: 2026-04-27T12:34:56.000Z
errors array<object>

Field-level validation errors when `code` is `invalid_request`.

errors[].pointer string required · Example: /items/0/eppCode
errors[].detail string required · Example: `eppCode` is required for this transfer.
errors[].code string required · Example: missing_required
extensions object
404 Not found. The resource does not exist or is not owned by the caller.
type string · Example: https://developer.hostup.se/errors/invalid_request
title string · Example: Validation failed
status integer · Example: 400
detail string · Example: The request body failed validation.
code string · Example: invalid_request

Stable machine-readable code. Branch on this field, not on `detail`.

instance string · Example: /api/v2/orders
requestId string · Example: req_01hxa3b4c5d6e7f8g9h0j1k2m3
timestamp string · Example: 2026-04-27T12:34:56.000Z
errors array<object>

Field-level validation errors when `code` is `invalid_request`.

errors[].pointer string required · Example: /items/0/eppCode
errors[].detail string required · Example: `eppCode` is required for this transfer.
errors[].code string required · Example: missing_required
extensions object
429 Rate limited. Retry after the limit resets. 429 responses include `Retry-After` seconds plus `X-RateLimit-*` headers.
type string · Example: https://developer.hostup.se/errors/invalid_request
title string · Example: Validation failed
status integer · Example: 400
detail string · Example: The request body failed validation.
code string · Example: invalid_request

Stable machine-readable code. Branch on this field, not on `detail`.

instance string · Example: /api/v2/orders
requestId string · Example: req_01hxa3b4c5d6e7f8g9h0j1k2m3
timestamp string · Example: 2026-04-27T12:34:56.000Z
errors array<object>

Field-level validation errors when `code` is `invalid_request`.

errors[].pointer string required · Example: /items/0/eppCode
errors[].detail string required · Example: `eppCode` is required for this transfer.
errors[].code string required · Example: missing_required
extensions object
500 Internal error. Retry later or contact support if the issue persists.
type string · Example: https://developer.hostup.se/errors/invalid_request
title string · Example: Validation failed
status integer · Example: 400
detail string · Example: The request body failed validation.
code string · Example: invalid_request

Stable machine-readable code. Branch on this field, not on `detail`.

instance string · Example: /api/v2/orders
requestId string · Example: req_01hxa3b4c5d6e7f8g9h0j1k2m3
timestamp string · Example: 2026-04-27T12:34:56.000Z
errors array<object>

Field-level validation errors when `code` is `invalid_request`.

errors[].pointer string required · Example: /items/0/eppCode
errors[].detail string required · Example: `eppCode` is required for this transfer.
errors[].code string required · Example: missing_required
extensions object
POST https://cloud.hostup.se/api/v2/domains/nameservers/validate
For AI assistants
View as Markdown
cURL 
curl -X POST "https://cloud.hostup.se/api/v2/domains/nameservers/validate" \
  -H "Accept: application/json" \
  -H "Content-Type: application/json" \
  -d '{
    "nameservers": [
      "primary.ns.hostup.se",
      "secondary.ns.hostup.se"
    ],
    "domain": "example.com"
  }'
Response 
{
  "results": [
    {
      "ns": "primary.ns.hostup.se",
      "isValid": true,
      "errorCode": null,
      "errorMessage": null
    },
    {
      "ns": "secondary.ns.hostup.se",
      "isValid": true,
      "errorCode": null,
      "errorMessage": null
    }
  ]
}
Request Body Validate HostUp managed nameservers 
{
  "nameservers": [
    "primary.ns.hostup.se",
    "secondary.ns.hostup.se"
  ],
  "domain": "example.com"
}