Company workspace resources are exposed by the People API:

Membership covers create workspace, leave, managers, users, invitations, and workspace search — see WorkspaceNew.

On a People workspace representation, teams and bulkInvitation links may target Membership URLs when workspace-invite behaviour is enabled in your environment; otherwise they stay on People. Always use the href from the response.

GET returns the workspace resource; the caller must be in the workspace (or a Huddle administrator).

GET /people/workspaces/123 HTTP/1.1
Accept: application/vnd.huddle.data+xml
Authorization: Bearer frootymcnooty/vonbootycherooty

HTTP/1.1 200 OK
Content-Type: application/vnd.huddle.data+xml

<workspace>
  <link rel="self" href="..." />
  <link rel="company" href="..." />
  <link rel="teams" href="..." />
  <link rel="bulkInvitation" href="..." />
  <name>My Important Workspace</name>
  <archived>false</archived>
  <locked>false</locked>
  <managers>
    <link rel="self" href="..." />
    <link rel="avatar" href="..." />
    <displayName>Andy McLoughlin</displayName>
  </managers>
  <createdDate>2014-07-04T14:13:57.447Z</createdDate>
  <memberCount>42</memberCount>
</workspace>

Links are repeated <link> elements (not a <links> wrapper). bulkInvitation appears only when the caller may invite to the workspace.

GET /people/workspaces/123 HTTP/1.1
Accept: application/vnd.huddle.data+json
Authorization: Bearer frootymcnooty/vonbootycherooty

HTTP/1.1 200 OK
Content-Type: application/vnd.huddle.data+json

{
  "links": [
    { "rel": "self", "href": "..." },
    { "rel": "company", "href": "..." },
    { "rel": "teams", "href": "..." },
    { "rel": "bulkInvitation", "href": "..." }
  ],
  "name": "My Important Workspace",
  "archived": false,
  "locked": false,
  "managers": [
    {
      "links": [
        { "rel": "self", "href": "..." },
        { "rel": "avatar", "href": "..." }
      ],
      "displayName": "Andy McLoughlin"
    }
  ],
  "createdDate": "2014-07-04T14:13:57.447Z",
  "memberCount": 42
}

• Teams — GET .../workspaces/{workspaceId}/teams on People (and Membership teams list when the teams link targets Membership).
• Workspace — legacy XML workspace document (Actor / older clients).
• WorkspaceNew — Membership workspaces (create, leave, managers, users, invitations).