A customer is unable to connect to the Nutanix Prism v3 REST API using PowerShell 5.1 in Constrained Language Mode, encountering a 401 authentication error.

{
  "signal_id": "bb2514fd-17f9-57c6-aa15-6fa581d981b8",
  "signal_type": "reddit-company",
  "signal_subtype": "customerFeedback",
  "detected_at": "2026-10-03T16:44:23+00:00",
  "company": {
    "name": "Nutanix",
    "domain": "nutanix.com"
  },
  "data": {
    "nsfw": false,
    "stage": "none",
    "awards": 0,
    "timing": "in_progress",
    "topics": [
      "api",
      "integration",
      "powershell",
      "authentication",
      "support"
    ],
    "post_id": "1wwrsjp",
    "summary": "A customer is unable to connect to the Nutanix Prism v3 REST API using PowerShell 5.1 in Constrained Language Mode, encountering a 401 authentication error.",
    "category": "integration",
    "evidence": [
      "[post] I'm trying to connect to a Nutanix Prism environment using PowerShell in order to list the VMs through the Nutanix REST API.",
      "[post] Initially, I tried Invoke-RestMethod with -Credential, but I received: 401 AUTHENTICATION REQUIRED \"Invalid cookies present in the request\"",
      "[post] Has anyone successfully used the Nutanix v3 REST API from PowerShell 5.1 under Constrained Language Mode? What's the recommended authentication method in this situation?"
    ],
    "virality": "very_low",
    "post_date": "2026-10-03T16:44:23.000Z",
    "post_kind": "text",
    "post_text": "Hi everyone,\n\nI'm trying to connect to a Nutanix Prism environment using PowerShell in order to list the VMs through the Nutanix REST API.\n\nMy environment:\n\nWindows PowerShell 5.1\n\nPowerShell is running in Constrained Language Mode\n\nNutanix Prism on https://<prism-server>:9440\n\nI'm trying to use the Nutanix v3 API\n\nEndpoint: /api/nutanix/v3/vms/list\n\nInitially, I tried Invoke-RestMethod with -Credential, but I received:\n\n401 AUTHENTICATION REQUIRED \"Invalid cookies present in the request\"\n\nI then tried to use Basic Authentication manually, but PowerShell's Constrained Language Mode blocks .NET methods such as:\n\n\\[Convert\\]::ToBase64String() \\[System.Net.ServicePointManager\\]::ServerCertificateValidationCallback\n\nI also have curl.exe available:\n\ncurl 8.21.0\n\nSo I tried:\n\ncurl.exe -k -u \"USERNAME\" \\` \"https://<prism-server>:9440/api/nutanix/v3/vms/list\" \\` -X POST \\` -H \"Content-Type: application/json\" \\` -d '{\"kind\":\"vm\"}'\n\nHowever, when running this from PowerShell ISE, it seems to hang after displaying:\n\nConnexion à Nutanix...\n\nMy goal is simply to authenticate and retrieve a list of VMs (name + UUID). I don't need to perform any modification on the Nutanix environment.\n\nHas anyone successfully used the Nutanix v3 REST API from PowerShell 5.1 under Constrained Language Mode? What's the recommended authentication method in this situation?\n\nThanks!",
    "sentiment": "negative",
    "subreddit": "virtualization",
    "event_date": "2026-10",
    "post_title": "Help needed: Connecting to Nutanix Prism API using PowerShell 5.1",
    "prominence": "core",
    "source_url": "https://www.reddit.com/r/virtualization/comments/1wwrsjp/help_needed_connecting_to_nutanix_prism_api_using/",
    "entity_role": "vendor",
    "post_author": "Mcm_Sys",
    "upvote_ratio": 1,
    "mention_count": 1,
    "mention_surge": false,
    "subreddit_url": "https://www.reddit.com/r/virtualization/",
    "total_upvotes": 1,
    "comments_total": 1,
    "total_comments": 1,
    "post_author_url": "https://www.reddit.com/user/Mcm_Sys/",
    "signal_category": "feedback",
    "comments_included": 0,
    "products_mentioned": [
      "Nutanix Prism",
      "Nutanix v3 API"
    ]
  }
}

curl https://signals.autobound.ai/v1/signals/bb2514fd-17f9-57c6-aa15-6fa581d981b8 \
  -H "X-API-KEY: $AUTOBOUND_API_KEY"

curl -X POST https://signals.autobound.ai/v1/companies/enrich \
  -H "X-API-KEY: $AUTOBOUND_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"domain":"nutanix.com","limit":20}'