List counties for a state

{
  "results": [
    {
      "slug": "string",
      "name": "string",
      "fips_code": "string",
      "supported_webhook_events": [
        "string"
      ]
    }
  ]
}

{
  "error": {
    "code": 400,
    "message": "Bad Request",
    "long_message": "Invalid person ID format: 'sdf'. Person ID must start with 'P' followed by exactly 10 alphanumeric characters. Example: 'PABcd12345e' or 'P1234567890'.",
    "meta": null
  },
  "wp_trace_id": "3b0b537a60d84057817bb40563ca5c99"
}

{
  "message": "Forbidden"
}

{
  "error": {
    "code": 404,
    "message": "Not Found",
    "long_message": "Person id not found: PABcd12345e",
    "meta": null
  },
  "wp_trace_id": "0c57473114bd49b3b3c4b585df624f2f"
}

{
  "error": {
    "code": 422,
    "message": "Unprocessable Entity",
    "long_message": "The request contains semantic errors and cannot be processed",
    "meta": null
  },
  "wp_trace_id": "7e5f2c9a1d8b4e6f9c0a3b5d7e1f2a4c"
}

{
  "message": "Too Many Requests",
  "error": "usage_cap_exceeded",
  "error_instance_id": "1b9d6bcd-bbfd-4b2d-9b5d-ab8dfbbd4bed",
  "limit": 1000,
  "used": 1000,
  "reset_at": "2026-09-01T00:00:00+00:00",
  "upgrade_url": "https://www.whitepages.com/billing/manage-plan/pro-api"
}

{
  "error": {
    "code": 500,
    "message": "Internal Server Error",
    "long_message": "An internal server error occurred",
    "meta": null
  },
  "wp_trace_id": "9c1a4e7f2b8d4c6a9e0f3b5d7c1a2e4f"
}