{
  "error": {
    "type": "NM_ERROR_TYPE",
    "code": "NM_ERROR_TYPE",
    "message": "Human readable message"
  }
}

{
  "error": {
    "type": "NM_UNAUTHORIZED",
    "message": "Invalid or missing NM-Key header."
  }
}

{
  "error": {
    "type": "NM_BUDGET_HARD_LIMIT",
    "message": "Agent 'support-bot' daily budget of $15.00 exceeded.",
    "spent": 15.43,
    "limit": 15.00,
    "period": "daily",
    "reset_at": "2026-05-22T00:00:00Z",
    "agent": "support-bot",
    "session_id": "sess_8f3a2c19"
  }
}

{
  "error": {
    "type": "NM_SHIELD_BLOCKED",
    "message": "Request blocked by Nolma Shield.",
    "risk_score": 0.94,
    "threat_type": "INJECTION",
    "session_id": "sess_8f3a2c19"
  }
}

{
  "error": {
    "type": "NM_PAYMENT_REQUIRED",
    "message": "Shadow mode requires Pro plan."
  }
}

{
  "error": {
    "type": "NM_RETRY_LOOP_DETECTED",
    "message": "Retry loop detected. Blocked for 5 minutes.",
    "resume_at": "2026-05-22T10:35:00Z",
    "agent": "support-bot"
  }
}

{
  "error": {
    "type": "NM_PII_DETECTED",
    "message": "PII detected in request. Block mode is enabled."
  }
}