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. Servers in different groups are kept away from each other.

Cloud VPS Cloud VPS

Authentication

Required API scope: write:vm

Use Authorization: Bearer <token> for API keys. Dashboard sessions may also use hostup_session.

Context

Path Parameters

id string required Example: id_01hxa3b4c5d6e7f8g9h0j1k2m3

Placement group public ID.

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. Servers in different sets are kept away from each other. Defaults to a.

a
b
c

Responses

201 Updated placement group detail.

No response body

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

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/id_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"
}