Add a VPS to a placement group

POST /api/v2/placement-groups/{id}/members

Add a VPS to Group A, B, or C inside the placement group. VPS in different groups are kept on separate hardware.

Cloud VPS Cloud VPS

Authentication

Required API scope: write:vm

Authenticate with an API key in the Authorization: Bearer <token> header.

Context

Path Parameters

id string required Example: pg_01hxa3b4c5d6e7f8g9h0j1k2m3

Placement group public ID. Do not invent this value; use the exact ID returned by the referenced API response.

Headers

Authorization Bearer <token>
Accept application/json
Content-Type application/json

Body

required
application/json
vpsId string required · Example: vps_01hxa3b4c5d6e7f8g9h0j1k2m3

VPS public ID from GET /api/v2/placement-groups/candidates or GET /api/v2/vps.

placementSet string · enum · Example: a

Customer-defined member group. VPS in different groups are kept on separate hardware. Defaults to a.

a
b
c

Responses

201 Updated placement group detail.
id string required · Example: pg_01hxa3b4c5d6e7f8g9h0j1k2m3
name string required · Example: Production database
policy string · enum required · Example: spread
spread
health string · enum required · Example: ok
ok
reconciling
violation
needsAttention boolean required · Example: false
compatibilityKey string · nullable required · Example: pgcmp_9f6a3b2c1d0e8a7b

members array<object> required
members[].vpsId string required · Example: vps_01hxa3b4c5d6e7f8g9h0j1k2m3
members[].name string required · Example: db-primary
members[].instanceUrl string required · Example: /instance/vps_01hxa3b4c5d6e7f8g9h0j1k2m3
members[].placementSet string · enum required · Example: a
a
b
c
members[].status string · enum required · Example: placed
placed
migrating
colocated
unknown
members[].addedAt string required · Example: 2026-06-28T10:02:00.000Z
actions object required
actions.canRename object required
actions.canRename.allowed boolean required · Example: true
actions.canRename.reason string · nullable required · Example: null

Nullable: may be null when not applicable.

actions.canDelete object required
actions.canDelete.allowed boolean required · Example: true
actions.canDelete.reason string · nullable required · Example: null

Nullable: may be null when not applicable.

actions.canAddMember object required
actions.canAddMember.allowed boolean required · Example: true
actions.canAddMember.reason string · nullable required · Example: null

Nullable: may be null when not applicable.

actions.canResolve object required
actions.canResolve.allowed boolean required · Example: false
actions.canResolve.reason string · nullable · enum required · Example: not_needed

Why the resolve action is unavailable: not_needed when the group has no issue a restart can fix, no_restart_target when no suitable separate hardware is available right now. null when allowed is true.

not_needed
no_restart_target
createdAt string required · Example: 2026-06-28T10:00:00.000Z
updatedAt string required · Example: 2026-06-28T10:05:00.000Z
400 The request body was invalid. Known code values are invalid_request (missing/invalid vpsId, invalid placementSet, or unknown fields) and not_a_vps (the referenced service is not a VPS).

No response body

401 Unauthorized. Authentication is required.
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
403 Forbidden. The caller lacks a required scope or does not own the resource.
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 The placement group or VPS could not be found. Known code values are placement_group_not_found and vps_not_found.

No response body

409 The VPS cannot join this placement group. Known code values are already_grouped, different_location, and server_not_eligible.

No response body

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/placement-groups/{id}/members
For AI assistants
View as Markdown
cURL 
curl -X POST "https://cloud.hostup.se/api/v2/placement-groups/pg_01hxa3b4c5d6e7f8g9h0j1k2m3/members" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Accept: application/json" \
  -H "Content-Type: application/json" \
  -d '{
    "vpsId": "vps_01hxa3b4c5d6e7f8g9h0j1k2m3",
    "placementSet": "a"
  }'
Response 
{
  "id": "pg_01hxa3b4c5d6e7f8g9h0j1k2m3",
  "name": "Production database",
  "policy": "spread",
  "health": "ok",
  "needsAttention": false,
  "compatibilityKey": "pgcmp_9f6a3b2c1d0e8a7b",
  "members": [
    {
      "vpsId": "vps_01hxa3b4c5d6e7f8g9h0j1k2m3",
      "name": "db-primary",
      "instanceUrl": "/instance/vps_01hxa3b4c5d6e7f8g9h0j1k2m3",
      "placementSet": "a",
      "status": "placed",
      "addedAt": "2026-06-28T10:02:00.000Z"
    }
  ],
  "actions": {
    "canRename": {
      "allowed": true,
      "reason": null
    },
    "canDelete": {
      "allowed": true,
      "reason": null
    },
    "canAddMember": {
      "allowed": true,
      "reason": null
    },
    "canResolve": {
      "allowed": false,
      "reason": "not_needed"
    }
  },
  "createdAt": "2026-06-28T10:00:00.000Z",
  "updatedAt": "2026-06-28T10:05:00.000Z"
}
Request Body 
{
  "vpsId": "vps_01hxa3b4c5d6e7f8g9h0j1k2m3",
  "placementSet": "a"
}