curl --request GET \
  --url https://your-instance.example.com/api/organizations/{organizationId}/extraction-rules \
  --header 'Authorization: Bearer <token>'

{
  "success": true,
  "data": {
    "builtInFields": {
      "province": {
        "mode": "allowlist",
        "values": [
          "ON",
          "QC",
          "BC",
          "AB"
        ],
        "regex": [
          "^[A-Z]{2}$"
        ]
      }
    },
    "customFields": {
      "creditScore": {
        "mode": "allowlist",
        "values": [],
        "regex": [
          "^\\d{3}$"
        ],
        "prompt": "Three-digit credit score"
      }
    }
  }
}